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Message-ID: <20231101-rust-binder-v1-20-08ba9197f637@google.com>
Date:   Wed, 01 Nov 2023 18:01:50 +0000
From:   Alice Ryhl <aliceryhl@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Arve Hjønnevåg" <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Carlos Llamas <cmllamas@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>
Cc:     linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        "Björn Roy Baron" <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Andreas Hindborg <a.hindborg@...sung.com>,
        Matt Gilbride <mattgilbride@...gle.com>,
        Jeffrey Vander Stoep <jeffv@...gle.com>,
        Matthew Maurer <mmaurer@...gle.com>,
        Alice Ryhl <aliceryhl@...gle.com>
Subject: [PATCH RFC 20/20] binder: delete the C implementation

The ultimate goal of this project is to replace the C implementation.

Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
---
 drivers/android/Kconfig        |   36 -
 drivers/android/binder.c       | 6630 ----------------------------------------
 drivers/android/binder_alloc.c | 1284 --------
 drivers/android/binderfs.c     |  827 -----
 4 files changed, 8777 deletions(-)

diff --git a/drivers/android/Kconfig b/drivers/android/Kconfig
index 82ed6ddabe1a..8b8badd87dc5 100644
--- a/drivers/android/Kconfig
+++ b/drivers/android/Kconfig
@@ -1,18 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 menu "Android"
 
-config ANDROID_BINDER_IPC
-	bool "Android Binder IPC Driver"
-	depends on MMU
-	default n
-	help
-	  Binder is used in Android for both communication between processes,
-	  and remote method invocation.
-
-	  This means one Android process can call a method/routine in another
-	  Android process, using Binder to identify, invoke and pass arguments
-	  between said processes.
-
 config ANDROID_BINDER_IPC_RUST
 	bool "Android Binder IPC Driver in Rust"
 	depends on MMU && RUST
@@ -24,18 +12,6 @@ config ANDROID_BINDER_IPC_RUST
 	  Android process, using Binder to identify, invoke and pass arguments
 	  between said processes.
 
-config ANDROID_BINDERFS
-	bool "Android Binderfs filesystem"
-	depends on ANDROID_BINDER_IPC
-	default n
-	help
-	  Binderfs is a pseudo-filesystem for the Android Binder IPC driver
-	  which can be mounted per-ipc namespace allowing to run multiple
-	  instances of Android.
-	  Each binderfs mount initially only contains a binder-control device.
-	  It can be used to dynamically allocate new binder IPC devices via
-	  ioctls.
-
 config ANDROID_BINDERFS_RUST
 	bool "Android Binderfs filesystem in Rust"
 	depends on ANDROID_BINDER_IPC_RUST
@@ -48,18 +24,6 @@ config ANDROID_BINDERFS_RUST
 	  It can be used to dynamically allocate new binder IPC devices via
 	  ioctls.
 
-config ANDROID_BINDER_DEVICES
-	string "Android Binder devices"
-	depends on ANDROID_BINDER_IPC
-	default "binder,hwbinder,vndbinder"
-	help
-	  Default value for the binder.devices parameter.
-
-	  The binder.devices parameter is a comma-separated list of strings
-	  that specifies the names of the binder device nodes that will be
-	  created. Each binder device has its own context manager, and is
-	  therefore logically separated from the other devices.
-
 config ANDROID_BINDER_DEVICES_RUST
 	string "Android Binder devices in Rust"
 	depends on ANDROID_BINDER_IPC_RUST
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
deleted file mode 100644
index 92128aae2d06..000000000000
--- a/drivers/android/binder.c
+++ /dev/null
@@ -1,6630 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* binder.c
- *
- * Android IPC Subsystem
- *
- * Copyright (C) 2007-2008 Google, Inc.
- */
-
-/*
- * Locking overview
- *
- * There are 3 main spinlocks which must be acquired in the
- * order shown:
- *
- * 1) proc->outer_lock : protects binder_ref
- *    binder_proc_lock() and binder_proc_unlock() are
- *    used to acq/rel.
- * 2) node->lock : protects most fields of binder_node.
- *    binder_node_lock() and binder_node_unlock() are
- *    used to acq/rel
- * 3) proc->inner_lock : protects the thread and node lists
- *    (proc->threads, proc->waiting_threads, proc->nodes)
- *    and all todo lists associated with the binder_proc
- *    (proc->todo, thread->todo, proc->delivered_death and
- *    node->async_todo), as well as thread->transaction_stack
- *    binder_inner_proc_lock() and binder_inner_proc_unlock()
- *    are used to acq/rel
- *
- * Any lock under procA must never be nested under any lock at the same
- * level or below on procB.
- *
- * Functions that require a lock held on entry indicate which lock
- * in the suffix of the function name:
- *
- * foo_olocked() : requires node->outer_lock
- * foo_nlocked() : requires node->lock
- * foo_ilocked() : requires proc->inner_lock
- * foo_oilocked(): requires proc->outer_lock and proc->inner_lock
- * foo_nilocked(): requires node->lock and proc->inner_lock
- * ...
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/fdtable.h>
-#include <linux/file.h>
-#include <linux/freezer.h>
-#include <linux/fs.h>
-#include <linux/list.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/nsproxy.h>
-#include <linux/poll.h>
-#include <linux/debugfs.h>
-#include <linux/rbtree.h>
-#include <linux/sched/signal.h>
-#include <linux/sched/mm.h>
-#include <linux/seq_file.h>
-#include <linux/string.h>
-#include <linux/uaccess.h>
-#include <linux/pid_namespace.h>
-#include <linux/security.h>
-#include <linux/spinlock.h>
-#include <linux/ratelimit.h>
-#include <linux/syscalls.h>
-#include <linux/task_work.h>
-#include <linux/sizes.h>
-#include <linux/ktime.h>
-
-#include <uapi/linux/android/binder.h>
-
-#include <linux/cacheflush.h>
-
-#include "binder_internal.h"
-#include "binder_trace.h"
-
-static HLIST_HEAD(binder_deferred_list);
-static DEFINE_MUTEX(binder_deferred_lock);
-
-static HLIST_HEAD(binder_devices);
-static HLIST_HEAD(binder_procs);
-static DEFINE_MUTEX(binder_procs_lock);
-
-static HLIST_HEAD(binder_dead_nodes);
-static DEFINE_SPINLOCK(binder_dead_nodes_lock);
-
-static struct dentry *binder_debugfs_dir_entry_root;
-static struct dentry *binder_debugfs_dir_entry_proc;
-static atomic_t binder_last_id;
-
-static int proc_show(struct seq_file *m, void *unused);
-DEFINE_SHOW_ATTRIBUTE(proc);
-
-#define FORBIDDEN_MMAP_FLAGS                (VM_WRITE)
-
-enum {
-	BINDER_DEBUG_USER_ERROR             = 1U << 0,
-	BINDER_DEBUG_FAILED_TRANSACTION     = 1U << 1,
-	BINDER_DEBUG_DEAD_TRANSACTION       = 1U << 2,
-	BINDER_DEBUG_OPEN_CLOSE             = 1U << 3,
-	BINDER_DEBUG_DEAD_BINDER            = 1U << 4,
-	BINDER_DEBUG_DEATH_NOTIFICATION     = 1U << 5,
-	BINDER_DEBUG_READ_WRITE             = 1U << 6,
-	BINDER_DEBUG_USER_REFS              = 1U << 7,
-	BINDER_DEBUG_THREADS                = 1U << 8,
-	BINDER_DEBUG_TRANSACTION            = 1U << 9,
-	BINDER_DEBUG_TRANSACTION_COMPLETE   = 1U << 10,
-	BINDER_DEBUG_FREE_BUFFER            = 1U << 11,
-	BINDER_DEBUG_INTERNAL_REFS          = 1U << 12,
-	BINDER_DEBUG_PRIORITY_CAP           = 1U << 13,
-	BINDER_DEBUG_SPINLOCKS              = 1U << 14,
-};
-static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
-	BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
-module_param_named(debug_mask, binder_debug_mask, uint, 0644);
-
-char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
-module_param_named(devices, binder_devices_param, charp, 0444);
-
-static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
-static int binder_stop_on_user_error;
-
-static int binder_set_stop_on_user_error(const char *val,
-					 const struct kernel_param *kp)
-{
-	int ret;
-
-	ret = param_set_int(val, kp);
-	if (binder_stop_on_user_error < 2)
-		wake_up(&binder_user_error_wait);
-	return ret;
-}
-module_param_call(stop_on_user_error, binder_set_stop_on_user_error,
-	param_get_int, &binder_stop_on_user_error, 0644);
-
-static __printf(2, 3) void binder_debug(int mask, const char *format, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	if (binder_debug_mask & mask) {
-		va_start(args, format);
-		vaf.va = &args;
-		vaf.fmt = format;
-		pr_info_ratelimited("%pV", &vaf);
-		va_end(args);
-	}
-}
-
-#define binder_txn_error(x...) \
-	binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, x)
-
-static __printf(1, 2) void binder_user_error(const char *format, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	if (binder_debug_mask & BINDER_DEBUG_USER_ERROR) {
-		va_start(args, format);
-		vaf.va = &args;
-		vaf.fmt = format;
-		pr_info_ratelimited("%pV", &vaf);
-		va_end(args);
-	}
-
-	if (binder_stop_on_user_error)
-		binder_stop_on_user_error = 2;
-}
-
-#define binder_set_extended_error(ee, _id, _command, _param) \
-	do { \
-		(ee)->id = _id; \
-		(ee)->command = _command; \
-		(ee)->param = _param; \
-	} while (0)
-
-#define to_flat_binder_object(hdr) \
-	container_of(hdr, struct flat_binder_object, hdr)
-
-#define to_binder_fd_object(hdr) container_of(hdr, struct binder_fd_object, hdr)
-
-#define to_binder_buffer_object(hdr) \
-	container_of(hdr, struct binder_buffer_object, hdr)
-
-#define to_binder_fd_array_object(hdr) \
-	container_of(hdr, struct binder_fd_array_object, hdr)
-
-static struct binder_stats binder_stats;
-
-static inline void binder_stats_deleted(enum binder_stat_types type)
-{
-	atomic_inc(&binder_stats.obj_deleted[type]);
-}
-
-static inline void binder_stats_created(enum binder_stat_types type)
-{
-	atomic_inc(&binder_stats.obj_created[type]);
-}
-
-struct binder_transaction_log_entry {
-	int debug_id;
-	int debug_id_done;
-	int call_type;
-	int from_proc;
-	int from_thread;
-	int target_handle;
-	int to_proc;
-	int to_thread;
-	int to_node;
-	int data_size;
-	int offsets_size;
-	int return_error_line;
-	uint32_t return_error;
-	uint32_t return_error_param;
-	char context_name[BINDERFS_MAX_NAME + 1];
-};
-
-struct binder_transaction_log {
-	atomic_t cur;
-	bool full;
-	struct binder_transaction_log_entry entry[32];
-};
-
-static struct binder_transaction_log binder_transaction_log;
-static struct binder_transaction_log binder_transaction_log_failed;
-
-static struct binder_transaction_log_entry *binder_transaction_log_add(
-	struct binder_transaction_log *log)
-{
-	struct binder_transaction_log_entry *e;
-	unsigned int cur = atomic_inc_return(&log->cur);
-
-	if (cur >= ARRAY_SIZE(log->entry))
-		log->full = true;
-	e = &log->entry[cur % ARRAY_SIZE(log->entry)];
-	WRITE_ONCE(e->debug_id_done, 0);
-	/*
-	 * write-barrier to synchronize access to e->debug_id_done.
-	 * We make sure the initialized 0 value is seen before
-	 * memset() other fields are zeroed by memset.
-	 */
-	smp_wmb();
-	memset(e, 0, sizeof(*e));
-	return e;
-}
-
-enum binder_deferred_state {
-	BINDER_DEFERRED_FLUSH        = 0x01,
-	BINDER_DEFERRED_RELEASE      = 0x02,
-};
-
-enum {
-	BINDER_LOOPER_STATE_REGISTERED  = 0x01,
-	BINDER_LOOPER_STATE_ENTERED     = 0x02,
-	BINDER_LOOPER_STATE_EXITED      = 0x04,
-	BINDER_LOOPER_STATE_INVALID     = 0x08,
-	BINDER_LOOPER_STATE_WAITING     = 0x10,
-	BINDER_LOOPER_STATE_POLL        = 0x20,
-};
-
-/**
- * binder_proc_lock() - Acquire outer lock for given binder_proc
- * @proc:         struct binder_proc to acquire
- *
- * Acquires proc->outer_lock. Used to protect binder_ref
- * structures associated with the given proc.
- */
-#define binder_proc_lock(proc) _binder_proc_lock(proc, __LINE__)
-static void
-_binder_proc_lock(struct binder_proc *proc, int line)
-	__acquires(&proc->outer_lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_lock(&proc->outer_lock);
-}
-
-/**
- * binder_proc_unlock() - Release spinlock for given binder_proc
- * @proc:                struct binder_proc to acquire
- *
- * Release lock acquired via binder_proc_lock()
- */
-#define binder_proc_unlock(proc) _binder_proc_unlock(proc, __LINE__)
-static void
-_binder_proc_unlock(struct binder_proc *proc, int line)
-	__releases(&proc->outer_lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_unlock(&proc->outer_lock);
-}
-
-/**
- * binder_inner_proc_lock() - Acquire inner lock for given binder_proc
- * @proc:         struct binder_proc to acquire
- *
- * Acquires proc->inner_lock. Used to protect todo lists
- */
-#define binder_inner_proc_lock(proc) _binder_inner_proc_lock(proc, __LINE__)
-static void
-_binder_inner_proc_lock(struct binder_proc *proc, int line)
-	__acquires(&proc->inner_lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_lock(&proc->inner_lock);
-}
-
-/**
- * binder_inner_proc_unlock() - Release inner lock for given binder_proc
- * @proc:         struct binder_proc to acquire
- *
- * Release lock acquired via binder_inner_proc_lock()
- */
-#define binder_inner_proc_unlock(proc) _binder_inner_proc_unlock(proc, __LINE__)
-static void
-_binder_inner_proc_unlock(struct binder_proc *proc, int line)
-	__releases(&proc->inner_lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_unlock(&proc->inner_lock);
-}
-
-/**
- * binder_node_lock() - Acquire spinlock for given binder_node
- * @node:         struct binder_node to acquire
- *
- * Acquires node->lock. Used to protect binder_node fields
- */
-#define binder_node_lock(node) _binder_node_lock(node, __LINE__)
-static void
-_binder_node_lock(struct binder_node *node, int line)
-	__acquires(&node->lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_lock(&node->lock);
-}
-
-/**
- * binder_node_unlock() - Release spinlock for given binder_proc
- * @node:         struct binder_node to acquire
- *
- * Release lock acquired via binder_node_lock()
- */
-#define binder_node_unlock(node) _binder_node_unlock(node, __LINE__)
-static void
-_binder_node_unlock(struct binder_node *node, int line)
-	__releases(&node->lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_unlock(&node->lock);
-}
-
-/**
- * binder_node_inner_lock() - Acquire node and inner locks
- * @node:         struct binder_node to acquire
- *
- * Acquires node->lock. If node->proc also acquires
- * proc->inner_lock. Used to protect binder_node fields
- */
-#define binder_node_inner_lock(node) _binder_node_inner_lock(node, __LINE__)
-static void
-_binder_node_inner_lock(struct binder_node *node, int line)
-	__acquires(&node->lock) __acquires(&node->proc->inner_lock)
-{
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	spin_lock(&node->lock);
-	if (node->proc)
-		binder_inner_proc_lock(node->proc);
-	else
-		/* annotation for sparse */
-		__acquire(&node->proc->inner_lock);
-}
-
-/**
- * binder_node_inner_unlock() - Release node and inner locks
- * @node:         struct binder_node to acquire
- *
- * Release lock acquired via binder_node_lock()
- */
-#define binder_node_inner_unlock(node) _binder_node_inner_unlock(node, __LINE__)
-static void
-_binder_node_inner_unlock(struct binder_node *node, int line)
-	__releases(&node->lock) __releases(&node->proc->inner_lock)
-{
-	struct binder_proc *proc = node->proc;
-
-	binder_debug(BINDER_DEBUG_SPINLOCKS,
-		     "%s: line=%d\n", __func__, line);
-	if (proc)
-		binder_inner_proc_unlock(proc);
-	else
-		/* annotation for sparse */
-		__release(&node->proc->inner_lock);
-	spin_unlock(&node->lock);
-}
-
-static bool binder_worklist_empty_ilocked(struct list_head *list)
-{
-	return list_empty(list);
-}
-
-/**
- * binder_worklist_empty() - Check if no items on the work list
- * @proc:       binder_proc associated with list
- * @list:	list to check
- *
- * Return: true if there are no items on list, else false
- */
-static bool binder_worklist_empty(struct binder_proc *proc,
-				  struct list_head *list)
-{
-	bool ret;
-
-	binder_inner_proc_lock(proc);
-	ret = binder_worklist_empty_ilocked(list);
-	binder_inner_proc_unlock(proc);
-	return ret;
-}
-
-/**
- * binder_enqueue_work_ilocked() - Add an item to the work list
- * @work:         struct binder_work to add to list
- * @target_list:  list to add work to
- *
- * Adds the work to the specified list. Asserts that work
- * is not already on a list.
- *
- * Requires the proc->inner_lock to be held.
- */
-static void
-binder_enqueue_work_ilocked(struct binder_work *work,
-			   struct list_head *target_list)
-{
-	BUG_ON(target_list == NULL);
-	BUG_ON(work->entry.next && !list_empty(&work->entry));
-	list_add_tail(&work->entry, target_list);
-}
-
-/**
- * binder_enqueue_deferred_thread_work_ilocked() - Add deferred thread work
- * @thread:       thread to queue work to
- * @work:         struct binder_work to add to list
- *
- * Adds the work to the todo list of the thread. Doesn't set the process_todo
- * flag, which means that (if it wasn't already set) the thread will go to
- * sleep without handling this work when it calls read.
- *
- * Requires the proc->inner_lock to be held.
- */
-static void
-binder_enqueue_deferred_thread_work_ilocked(struct binder_thread *thread,
-					    struct binder_work *work)
-{
-	WARN_ON(!list_empty(&thread->waiting_thread_node));
-	binder_enqueue_work_ilocked(work, &thread->todo);
-}
-
-/**
- * binder_enqueue_thread_work_ilocked() - Add an item to the thread work list
- * @thread:       thread to queue work to
- * @work:         struct binder_work to add to list
- *
- * Adds the work to the todo list of the thread, and enables processing
- * of the todo queue.
- *
- * Requires the proc->inner_lock to be held.
- */
-static void
-binder_enqueue_thread_work_ilocked(struct binder_thread *thread,
-				   struct binder_work *work)
-{
-	WARN_ON(!list_empty(&thread->waiting_thread_node));
-	binder_enqueue_work_ilocked(work, &thread->todo);
-	thread->process_todo = true;
-}
-
-/**
- * binder_enqueue_thread_work() - Add an item to the thread work list
- * @thread:       thread to queue work to
- * @work:         struct binder_work to add to list
- *
- * Adds the work to the todo list of the thread, and enables processing
- * of the todo queue.
- */
-static void
-binder_enqueue_thread_work(struct binder_thread *thread,
-			   struct binder_work *work)
-{
-	binder_inner_proc_lock(thread->proc);
-	binder_enqueue_thread_work_ilocked(thread, work);
-	binder_inner_proc_unlock(thread->proc);
-}
-
-static void
-binder_dequeue_work_ilocked(struct binder_work *work)
-{
-	list_del_init(&work->entry);
-}
-
-/**
- * binder_dequeue_work() - Removes an item from the work list
- * @proc:         binder_proc associated with list
- * @work:         struct binder_work to remove from list
- *
- * Removes the specified work item from whatever list it is on.
- * Can safely be called if work is not on any list.
- */
-static void
-binder_dequeue_work(struct binder_proc *proc, struct binder_work *work)
-{
-	binder_inner_proc_lock(proc);
-	binder_dequeue_work_ilocked(work);
-	binder_inner_proc_unlock(proc);
-}
-
-static struct binder_work *binder_dequeue_work_head_ilocked(
-					struct list_head *list)
-{
-	struct binder_work *w;
-
-	w = list_first_entry_or_null(list, struct binder_work, entry);
-	if (w)
-		list_del_init(&w->entry);
-	return w;
-}
-
-static void
-binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer);
-static void binder_free_thread(struct binder_thread *thread);
-static void binder_free_proc(struct binder_proc *proc);
-static void binder_inc_node_tmpref_ilocked(struct binder_node *node);
-
-static bool binder_has_work_ilocked(struct binder_thread *thread,
-				    bool do_proc_work)
-{
-	return thread->process_todo ||
-		thread->looper_need_return ||
-		(do_proc_work &&
-		 !binder_worklist_empty_ilocked(&thread->proc->todo));
-}
-
-static bool binder_has_work(struct binder_thread *thread, bool do_proc_work)
-{
-	bool has_work;
-
-	binder_inner_proc_lock(thread->proc);
-	has_work = binder_has_work_ilocked(thread, do_proc_work);
-	binder_inner_proc_unlock(thread->proc);
-
-	return has_work;
-}
-
-static bool binder_available_for_proc_work_ilocked(struct binder_thread *thread)
-{
-	return !thread->transaction_stack &&
-		binder_worklist_empty_ilocked(&thread->todo) &&
-		(thread->looper & (BINDER_LOOPER_STATE_ENTERED |
-				   BINDER_LOOPER_STATE_REGISTERED));
-}
-
-static void binder_wakeup_poll_threads_ilocked(struct binder_proc *proc,
-					       bool sync)
-{
-	struct rb_node *n;
-	struct binder_thread *thread;
-
-	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
-		thread = rb_entry(n, struct binder_thread, rb_node);
-		if (thread->looper & BINDER_LOOPER_STATE_POLL &&
-		    binder_available_for_proc_work_ilocked(thread)) {
-			if (sync)
-				wake_up_interruptible_sync(&thread->wait);
-			else
-				wake_up_interruptible(&thread->wait);
-		}
-	}
-}
-
-/**
- * binder_select_thread_ilocked() - selects a thread for doing proc work.
- * @proc:	process to select a thread from
- *
- * Note that calling this function moves the thread off the waiting_threads
- * list, so it can only be woken up by the caller of this function, or a
- * signal. Therefore, callers *should* always wake up the thread this function
- * returns.
- *
- * Return:	If there's a thread currently waiting for process work,
- *		returns that thread. Otherwise returns NULL.
- */
-static struct binder_thread *
-binder_select_thread_ilocked(struct binder_proc *proc)
-{
-	struct binder_thread *thread;
-
-	assert_spin_locked(&proc->inner_lock);
-	thread = list_first_entry_or_null(&proc->waiting_threads,
-					  struct binder_thread,
-					  waiting_thread_node);
-
-	if (thread)
-		list_del_init(&thread->waiting_thread_node);
-
-	return thread;
-}
-
-/**
- * binder_wakeup_thread_ilocked() - wakes up a thread for doing proc work.
- * @proc:	process to wake up a thread in
- * @thread:	specific thread to wake-up (may be NULL)
- * @sync:	whether to do a synchronous wake-up
- *
- * This function wakes up a thread in the @proc process.
- * The caller may provide a specific thread to wake-up in
- * the @thread parameter. If @thread is NULL, this function
- * will wake up threads that have called poll().
- *
- * Note that for this function to work as expected, callers
- * should first call binder_select_thread() to find a thread
- * to handle the work (if they don't have a thread already),
- * and pass the result into the @thread parameter.
- */
-static void binder_wakeup_thread_ilocked(struct binder_proc *proc,
-					 struct binder_thread *thread,
-					 bool sync)
-{
-	assert_spin_locked(&proc->inner_lock);
-
-	if (thread) {
-		if (sync)
-			wake_up_interruptible_sync(&thread->wait);
-		else
-			wake_up_interruptible(&thread->wait);
-		return;
-	}
-
-	/* Didn't find a thread waiting for proc work; this can happen
-	 * in two scenarios:
-	 * 1. All threads are busy handling transactions
-	 *    In that case, one of those threads should call back into
-	 *    the kernel driver soon and pick up this work.
-	 * 2. Threads are using the (e)poll interface, in which case
-	 *    they may be blocked on the waitqueue without having been
-	 *    added to waiting_threads. For this case, we just iterate
-	 *    over all threads not handling transaction work, and
-	 *    wake them all up. We wake all because we don't know whether
-	 *    a thread that called into (e)poll is handling non-binder
-	 *    work currently.
-	 */
-	binder_wakeup_poll_threads_ilocked(proc, sync);
-}
-
-static void binder_wakeup_proc_ilocked(struct binder_proc *proc)
-{
-	struct binder_thread *thread = binder_select_thread_ilocked(proc);
-
-	binder_wakeup_thread_ilocked(proc, thread, /* sync = */false);
-}
-
-static void binder_set_nice(long nice)
-{
-	long min_nice;
-
-	if (can_nice(current, nice)) {
-		set_user_nice(current, nice);
-		return;
-	}
-	min_nice = rlimit_to_nice(rlimit(RLIMIT_NICE));
-	binder_debug(BINDER_DEBUG_PRIORITY_CAP,
-		     "%d: nice value %ld not allowed use %ld instead\n",
-		      current->pid, nice, min_nice);
-	set_user_nice(current, min_nice);
-	if (min_nice <= MAX_NICE)
-		return;
-	binder_user_error("%d RLIMIT_NICE not set\n", current->pid);
-}
-
-static struct binder_node *binder_get_node_ilocked(struct binder_proc *proc,
-						   binder_uintptr_t ptr)
-{
-	struct rb_node *n = proc->nodes.rb_node;
-	struct binder_node *node;
-
-	assert_spin_locked(&proc->inner_lock);
-
-	while (n) {
-		node = rb_entry(n, struct binder_node, rb_node);
-
-		if (ptr < node->ptr)
-			n = n->rb_left;
-		else if (ptr > node->ptr)
-			n = n->rb_right;
-		else {
-			/*
-			 * take an implicit weak reference
-			 * to ensure node stays alive until
-			 * call to binder_put_node()
-			 */
-			binder_inc_node_tmpref_ilocked(node);
-			return node;
-		}
-	}
-	return NULL;
-}
-
-static struct binder_node *binder_get_node(struct binder_proc *proc,
-					   binder_uintptr_t ptr)
-{
-	struct binder_node *node;
-
-	binder_inner_proc_lock(proc);
-	node = binder_get_node_ilocked(proc, ptr);
-	binder_inner_proc_unlock(proc);
-	return node;
-}
-
-static struct binder_node *binder_init_node_ilocked(
-						struct binder_proc *proc,
-						struct binder_node *new_node,
-						struct flat_binder_object *fp)
-{
-	struct rb_node **p = &proc->nodes.rb_node;
-	struct rb_node *parent = NULL;
-	struct binder_node *node;
-	binder_uintptr_t ptr = fp ? fp->binder : 0;
-	binder_uintptr_t cookie = fp ? fp->cookie : 0;
-	__u32 flags = fp ? fp->flags : 0;
-
-	assert_spin_locked(&proc->inner_lock);
-
-	while (*p) {
-
-		parent = *p;
-		node = rb_entry(parent, struct binder_node, rb_node);
-
-		if (ptr < node->ptr)
-			p = &(*p)->rb_left;
-		else if (ptr > node->ptr)
-			p = &(*p)->rb_right;
-		else {
-			/*
-			 * A matching node is already in
-			 * the rb tree. Abandon the init
-			 * and return it.
-			 */
-			binder_inc_node_tmpref_ilocked(node);
-			return node;
-		}
-	}
-	node = new_node;
-	binder_stats_created(BINDER_STAT_NODE);
-	node->tmp_refs++;
-	rb_link_node(&node->rb_node, parent, p);
-	rb_insert_color(&node->rb_node, &proc->nodes);
-	node->debug_id = atomic_inc_return(&binder_last_id);
-	node->proc = proc;
-	node->ptr = ptr;
-	node->cookie = cookie;
-	node->work.type = BINDER_WORK_NODE;
-	node->min_priority = flags & FLAT_BINDER_FLAG_PRIORITY_MASK;
-	node->accept_fds = !!(flags & FLAT_BINDER_FLAG_ACCEPTS_FDS);
-	node->txn_security_ctx = !!(flags & FLAT_BINDER_FLAG_TXN_SECURITY_CTX);
-	spin_lock_init(&node->lock);
-	INIT_LIST_HEAD(&node->work.entry);
-	INIT_LIST_HEAD(&node->async_todo);
-	binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-		     "%d:%d node %d u%016llx c%016llx created\n",
-		     proc->pid, current->pid, node->debug_id,
-		     (u64)node->ptr, (u64)node->cookie);
-
-	return node;
-}
-
-static struct binder_node *binder_new_node(struct binder_proc *proc,
-					   struct flat_binder_object *fp)
-{
-	struct binder_node *node;
-	struct binder_node *new_node = kzalloc(sizeof(*node), GFP_KERNEL);
-
-	if (!new_node)
-		return NULL;
-	binder_inner_proc_lock(proc);
-	node = binder_init_node_ilocked(proc, new_node, fp);
-	binder_inner_proc_unlock(proc);
-	if (node != new_node)
-		/*
-		 * The node was already added by another thread
-		 */
-		kfree(new_node);
-
-	return node;
-}
-
-static void binder_free_node(struct binder_node *node)
-{
-	kfree(node);
-	binder_stats_deleted(BINDER_STAT_NODE);
-}
-
-static int binder_inc_node_nilocked(struct binder_node *node, int strong,
-				    int internal,
-				    struct list_head *target_list)
-{
-	struct binder_proc *proc = node->proc;
-
-	assert_spin_locked(&node->lock);
-	if (proc)
-		assert_spin_locked(&proc->inner_lock);
-	if (strong) {
-		if (internal) {
-			if (target_list == NULL &&
-			    node->internal_strong_refs == 0 &&
-			    !(node->proc &&
-			      node == node->proc->context->binder_context_mgr_node &&
-			      node->has_strong_ref)) {
-				pr_err("invalid inc strong node for %d\n",
-					node->debug_id);
-				return -EINVAL;
-			}
-			node->internal_strong_refs++;
-		} else
-			node->local_strong_refs++;
-		if (!node->has_strong_ref && target_list) {
-			struct binder_thread *thread = container_of(target_list,
-						    struct binder_thread, todo);
-			binder_dequeue_work_ilocked(&node->work);
-			BUG_ON(&thread->todo != target_list);
-			binder_enqueue_deferred_thread_work_ilocked(thread,
-								   &node->work);
-		}
-	} else {
-		if (!internal)
-			node->local_weak_refs++;
-		if (!node->has_weak_ref && list_empty(&node->work.entry)) {
-			if (target_list == NULL) {
-				pr_err("invalid inc weak node for %d\n",
-					node->debug_id);
-				return -EINVAL;
-			}
-			/*
-			 * See comment above
-			 */
-			binder_enqueue_work_ilocked(&node->work, target_list);
-		}
-	}
-	return 0;
-}
-
-static int binder_inc_node(struct binder_node *node, int strong, int internal,
-			   struct list_head *target_list)
-{
-	int ret;
-
-	binder_node_inner_lock(node);
-	ret = binder_inc_node_nilocked(node, strong, internal, target_list);
-	binder_node_inner_unlock(node);
-
-	return ret;
-}
-
-static bool binder_dec_node_nilocked(struct binder_node *node,
-				     int strong, int internal)
-{
-	struct binder_proc *proc = node->proc;
-
-	assert_spin_locked(&node->lock);
-	if (proc)
-		assert_spin_locked(&proc->inner_lock);
-	if (strong) {
-		if (internal)
-			node->internal_strong_refs--;
-		else
-			node->local_strong_refs--;
-		if (node->local_strong_refs || node->internal_strong_refs)
-			return false;
-	} else {
-		if (!internal)
-			node->local_weak_refs--;
-		if (node->local_weak_refs || node->tmp_refs ||
-				!hlist_empty(&node->refs))
-			return false;
-	}
-
-	if (proc && (node->has_strong_ref || node->has_weak_ref)) {
-		if (list_empty(&node->work.entry)) {
-			binder_enqueue_work_ilocked(&node->work, &proc->todo);
-			binder_wakeup_proc_ilocked(proc);
-		}
-	} else {
-		if (hlist_empty(&node->refs) && !node->local_strong_refs &&
-		    !node->local_weak_refs && !node->tmp_refs) {
-			if (proc) {
-				binder_dequeue_work_ilocked(&node->work);
-				rb_erase(&node->rb_node, &proc->nodes);
-				binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-					     "refless node %d deleted\n",
-					     node->debug_id);
-			} else {
-				BUG_ON(!list_empty(&node->work.entry));
-				spin_lock(&binder_dead_nodes_lock);
-				/*
-				 * tmp_refs could have changed so
-				 * check it again
-				 */
-				if (node->tmp_refs) {
-					spin_unlock(&binder_dead_nodes_lock);
-					return false;
-				}
-				hlist_del(&node->dead_node);
-				spin_unlock(&binder_dead_nodes_lock);
-				binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-					     "dead node %d deleted\n",
-					     node->debug_id);
-			}
-			return true;
-		}
-	}
-	return false;
-}
-
-static void binder_dec_node(struct binder_node *node, int strong, int internal)
-{
-	bool free_node;
-
-	binder_node_inner_lock(node);
-	free_node = binder_dec_node_nilocked(node, strong, internal);
-	binder_node_inner_unlock(node);
-	if (free_node)
-		binder_free_node(node);
-}
-
-static void binder_inc_node_tmpref_ilocked(struct binder_node *node)
-{
-	/*
-	 * No call to binder_inc_node() is needed since we
-	 * don't need to inform userspace of any changes to
-	 * tmp_refs
-	 */
-	node->tmp_refs++;
-}
-
-/**
- * binder_inc_node_tmpref() - take a temporary reference on node
- * @node:	node to reference
- *
- * Take reference on node to prevent the node from being freed
- * while referenced only by a local variable. The inner lock is
- * needed to serialize with the node work on the queue (which
- * isn't needed after the node is dead). If the node is dead
- * (node->proc is NULL), use binder_dead_nodes_lock to protect
- * node->tmp_refs against dead-node-only cases where the node
- * lock cannot be acquired (eg traversing the dead node list to
- * print nodes)
- */
-static void binder_inc_node_tmpref(struct binder_node *node)
-{
-	binder_node_lock(node);
-	if (node->proc)
-		binder_inner_proc_lock(node->proc);
-	else
-		spin_lock(&binder_dead_nodes_lock);
-	binder_inc_node_tmpref_ilocked(node);
-	if (node->proc)
-		binder_inner_proc_unlock(node->proc);
-	else
-		spin_unlock(&binder_dead_nodes_lock);
-	binder_node_unlock(node);
-}
-
-/**
- * binder_dec_node_tmpref() - remove a temporary reference on node
- * @node:	node to reference
- *
- * Release temporary reference on node taken via binder_inc_node_tmpref()
- */
-static void binder_dec_node_tmpref(struct binder_node *node)
-{
-	bool free_node;
-
-	binder_node_inner_lock(node);
-	if (!node->proc)
-		spin_lock(&binder_dead_nodes_lock);
-	else
-		__acquire(&binder_dead_nodes_lock);
-	node->tmp_refs--;
-	BUG_ON(node->tmp_refs < 0);
-	if (!node->proc)
-		spin_unlock(&binder_dead_nodes_lock);
-	else
-		__release(&binder_dead_nodes_lock);
-	/*
-	 * Call binder_dec_node() to check if all refcounts are 0
-	 * and cleanup is needed. Calling with strong=0 and internal=1
-	 * causes no actual reference to be released in binder_dec_node().
-	 * If that changes, a change is needed here too.
-	 */
-	free_node = binder_dec_node_nilocked(node, 0, 1);
-	binder_node_inner_unlock(node);
-	if (free_node)
-		binder_free_node(node);
-}
-
-static void binder_put_node(struct binder_node *node)
-{
-	binder_dec_node_tmpref(node);
-}
-
-static struct binder_ref *binder_get_ref_olocked(struct binder_proc *proc,
-						 u32 desc, bool need_strong_ref)
-{
-	struct rb_node *n = proc->refs_by_desc.rb_node;
-	struct binder_ref *ref;
-
-	while (n) {
-		ref = rb_entry(n, struct binder_ref, rb_node_desc);
-
-		if (desc < ref->data.desc) {
-			n = n->rb_left;
-		} else if (desc > ref->data.desc) {
-			n = n->rb_right;
-		} else if (need_strong_ref && !ref->data.strong) {
-			binder_user_error("tried to use weak ref as strong ref\n");
-			return NULL;
-		} else {
-			return ref;
-		}
-	}
-	return NULL;
-}
-
-/**
- * binder_get_ref_for_node_olocked() - get the ref associated with given node
- * @proc:	binder_proc that owns the ref
- * @node:	binder_node of target
- * @new_ref:	newly allocated binder_ref to be initialized or %NULL
- *
- * Look up the ref for the given node and return it if it exists
- *
- * If it doesn't exist and the caller provides a newly allocated
- * ref, initialize the fields of the newly allocated ref and insert
- * into the given proc rb_trees and node refs list.
- *
- * Return:	the ref for node. It is possible that another thread
- *		allocated/initialized the ref first in which case the
- *		returned ref would be different than the passed-in
- *		new_ref. new_ref must be kfree'd by the caller in
- *		this case.
- */
-static struct binder_ref *binder_get_ref_for_node_olocked(
-					struct binder_proc *proc,
-					struct binder_node *node,
-					struct binder_ref *new_ref)
-{
-	struct binder_context *context = proc->context;
-	struct rb_node **p = &proc->refs_by_node.rb_node;
-	struct rb_node *parent = NULL;
-	struct binder_ref *ref;
-	struct rb_node *n;
-
-	while (*p) {
-		parent = *p;
-		ref = rb_entry(parent, struct binder_ref, rb_node_node);
-
-		if (node < ref->node)
-			p = &(*p)->rb_left;
-		else if (node > ref->node)
-			p = &(*p)->rb_right;
-		else
-			return ref;
-	}
-	if (!new_ref)
-		return NULL;
-
-	binder_stats_created(BINDER_STAT_REF);
-	new_ref->data.debug_id = atomic_inc_return(&binder_last_id);
-	new_ref->proc = proc;
-	new_ref->node = node;
-	rb_link_node(&new_ref->rb_node_node, parent, p);
-	rb_insert_color(&new_ref->rb_node_node, &proc->refs_by_node);
-
-	new_ref->data.desc = (node == context->binder_context_mgr_node) ? 0 : 1;
-	for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
-		ref = rb_entry(n, struct binder_ref, rb_node_desc);
-		if (ref->data.desc > new_ref->data.desc)
-			break;
-		new_ref->data.desc = ref->data.desc + 1;
-	}
-
-	p = &proc->refs_by_desc.rb_node;
-	while (*p) {
-		parent = *p;
-		ref = rb_entry(parent, struct binder_ref, rb_node_desc);
-
-		if (new_ref->data.desc < ref->data.desc)
-			p = &(*p)->rb_left;
-		else if (new_ref->data.desc > ref->data.desc)
-			p = &(*p)->rb_right;
-		else
-			BUG();
-	}
-	rb_link_node(&new_ref->rb_node_desc, parent, p);
-	rb_insert_color(&new_ref->rb_node_desc, &proc->refs_by_desc);
-
-	binder_node_lock(node);
-	hlist_add_head(&new_ref->node_entry, &node->refs);
-
-	binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-		     "%d new ref %d desc %d for node %d\n",
-		      proc->pid, new_ref->data.debug_id, new_ref->data.desc,
-		      node->debug_id);
-	binder_node_unlock(node);
-	return new_ref;
-}
-
-static void binder_cleanup_ref_olocked(struct binder_ref *ref)
-{
-	bool delete_node = false;
-
-	binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-		     "%d delete ref %d desc %d for node %d\n",
-		      ref->proc->pid, ref->data.debug_id, ref->data.desc,
-		      ref->node->debug_id);
-
-	rb_erase(&ref->rb_node_desc, &ref->proc->refs_by_desc);
-	rb_erase(&ref->rb_node_node, &ref->proc->refs_by_node);
-
-	binder_node_inner_lock(ref->node);
-	if (ref->data.strong)
-		binder_dec_node_nilocked(ref->node, 1, 1);
-
-	hlist_del(&ref->node_entry);
-	delete_node = binder_dec_node_nilocked(ref->node, 0, 1);
-	binder_node_inner_unlock(ref->node);
-	/*
-	 * Clear ref->node unless we want the caller to free the node
-	 */
-	if (!delete_node) {
-		/*
-		 * The caller uses ref->node to determine
-		 * whether the node needs to be freed. Clear
-		 * it since the node is still alive.
-		 */
-		ref->node = NULL;
-	}
-
-	if (ref->death) {
-		binder_debug(BINDER_DEBUG_DEAD_BINDER,
-			     "%d delete ref %d desc %d has death notification\n",
-			      ref->proc->pid, ref->data.debug_id,
-			      ref->data.desc);
-		binder_dequeue_work(ref->proc, &ref->death->work);
-		binder_stats_deleted(BINDER_STAT_DEATH);
-	}
-	binder_stats_deleted(BINDER_STAT_REF);
-}
-
-/**
- * binder_inc_ref_olocked() - increment the ref for given handle
- * @ref:         ref to be incremented
- * @strong:      if true, strong increment, else weak
- * @target_list: list to queue node work on
- *
- * Increment the ref. @ref->proc->outer_lock must be held on entry
- *
- * Return: 0, if successful, else errno
- */
-static int binder_inc_ref_olocked(struct binder_ref *ref, int strong,
-				  struct list_head *target_list)
-{
-	int ret;
-
-	if (strong) {
-		if (ref->data.strong == 0) {
-			ret = binder_inc_node(ref->node, 1, 1, target_list);
-			if (ret)
-				return ret;
-		}
-		ref->data.strong++;
-	} else {
-		if (ref->data.weak == 0) {
-			ret = binder_inc_node(ref->node, 0, 1, target_list);
-			if (ret)
-				return ret;
-		}
-		ref->data.weak++;
-	}
-	return 0;
-}
-
-/**
- * binder_dec_ref_olocked() - dec the ref for given handle
- * @ref:	ref to be decremented
- * @strong:	if true, strong decrement, else weak
- *
- * Decrement the ref.
- *
- * Return: %true if ref is cleaned up and ready to be freed.
- */
-static bool binder_dec_ref_olocked(struct binder_ref *ref, int strong)
-{
-	if (strong) {
-		if (ref->data.strong == 0) {
-			binder_user_error("%d invalid dec strong, ref %d desc %d s %d w %d\n",
-					  ref->proc->pid, ref->data.debug_id,
-					  ref->data.desc, ref->data.strong,
-					  ref->data.weak);
-			return false;
-		}
-		ref->data.strong--;
-		if (ref->data.strong == 0)
-			binder_dec_node(ref->node, strong, 1);
-	} else {
-		if (ref->data.weak == 0) {
-			binder_user_error("%d invalid dec weak, ref %d desc %d s %d w %d\n",
-					  ref->proc->pid, ref->data.debug_id,
-					  ref->data.desc, ref->data.strong,
-					  ref->data.weak);
-			return false;
-		}
-		ref->data.weak--;
-	}
-	if (ref->data.strong == 0 && ref->data.weak == 0) {
-		binder_cleanup_ref_olocked(ref);
-		return true;
-	}
-	return false;
-}
-
-/**
- * binder_get_node_from_ref() - get the node from the given proc/desc
- * @proc:	proc containing the ref
- * @desc:	the handle associated with the ref
- * @need_strong_ref: if true, only return node if ref is strong
- * @rdata:	the id/refcount data for the ref
- *
- * Given a proc and ref handle, return the associated binder_node
- *
- * Return: a binder_node or NULL if not found or not strong when strong required
- */
-static struct binder_node *binder_get_node_from_ref(
-		struct binder_proc *proc,
-		u32 desc, bool need_strong_ref,
-		struct binder_ref_data *rdata)
-{
-	struct binder_node *node;
-	struct binder_ref *ref;
-
-	binder_proc_lock(proc);
-	ref = binder_get_ref_olocked(proc, desc, need_strong_ref);
-	if (!ref)
-		goto err_no_ref;
-	node = ref->node;
-	/*
-	 * Take an implicit reference on the node to ensure
-	 * it stays alive until the call to binder_put_node()
-	 */
-	binder_inc_node_tmpref(node);
-	if (rdata)
-		*rdata = ref->data;
-	binder_proc_unlock(proc);
-
-	return node;
-
-err_no_ref:
-	binder_proc_unlock(proc);
-	return NULL;
-}
-
-/**
- * binder_free_ref() - free the binder_ref
- * @ref:	ref to free
- *
- * Free the binder_ref. Free the binder_node indicated by ref->node
- * (if non-NULL) and the binder_ref_death indicated by ref->death.
- */
-static void binder_free_ref(struct binder_ref *ref)
-{
-	if (ref->node)
-		binder_free_node(ref->node);
-	kfree(ref->death);
-	kfree(ref);
-}
-
-/**
- * binder_update_ref_for_handle() - inc/dec the ref for given handle
- * @proc:	proc containing the ref
- * @desc:	the handle associated with the ref
- * @increment:	true=inc reference, false=dec reference
- * @strong:	true=strong reference, false=weak reference
- * @rdata:	the id/refcount data for the ref
- *
- * Given a proc and ref handle, increment or decrement the ref
- * according to "increment" arg.
- *
- * Return: 0 if successful, else errno
- */
-static int binder_update_ref_for_handle(struct binder_proc *proc,
-		uint32_t desc, bool increment, bool strong,
-		struct binder_ref_data *rdata)
-{
-	int ret = 0;
-	struct binder_ref *ref;
-	bool delete_ref = false;
-
-	binder_proc_lock(proc);
-	ref = binder_get_ref_olocked(proc, desc, strong);
-	if (!ref) {
-		ret = -EINVAL;
-		goto err_no_ref;
-	}
-	if (increment)
-		ret = binder_inc_ref_olocked(ref, strong, NULL);
-	else
-		delete_ref = binder_dec_ref_olocked(ref, strong);
-
-	if (rdata)
-		*rdata = ref->data;
-	binder_proc_unlock(proc);
-
-	if (delete_ref)
-		binder_free_ref(ref);
-	return ret;
-
-err_no_ref:
-	binder_proc_unlock(proc);
-	return ret;
-}
-
-/**
- * binder_dec_ref_for_handle() - dec the ref for given handle
- * @proc:	proc containing the ref
- * @desc:	the handle associated with the ref
- * @strong:	true=strong reference, false=weak reference
- * @rdata:	the id/refcount data for the ref
- *
- * Just calls binder_update_ref_for_handle() to decrement the ref.
- *
- * Return: 0 if successful, else errno
- */
-static int binder_dec_ref_for_handle(struct binder_proc *proc,
-		uint32_t desc, bool strong, struct binder_ref_data *rdata)
-{
-	return binder_update_ref_for_handle(proc, desc, false, strong, rdata);
-}
-
-
-/**
- * binder_inc_ref_for_node() - increment the ref for given proc/node
- * @proc:	 proc containing the ref
- * @node:	 target node
- * @strong:	 true=strong reference, false=weak reference
- * @target_list: worklist to use if node is incremented
- * @rdata:	 the id/refcount data for the ref
- *
- * Given a proc and node, increment the ref. Create the ref if it
- * doesn't already exist
- *
- * Return: 0 if successful, else errno
- */
-static int binder_inc_ref_for_node(struct binder_proc *proc,
-			struct binder_node *node,
-			bool strong,
-			struct list_head *target_list,
-			struct binder_ref_data *rdata)
-{
-	struct binder_ref *ref;
-	struct binder_ref *new_ref = NULL;
-	int ret = 0;
-
-	binder_proc_lock(proc);
-	ref = binder_get_ref_for_node_olocked(proc, node, NULL);
-	if (!ref) {
-		binder_proc_unlock(proc);
-		new_ref = kzalloc(sizeof(*ref), GFP_KERNEL);
-		if (!new_ref)
-			return -ENOMEM;
-		binder_proc_lock(proc);
-		ref = binder_get_ref_for_node_olocked(proc, node, new_ref);
-	}
-	ret = binder_inc_ref_olocked(ref, strong, target_list);
-	*rdata = ref->data;
-	if (ret && ref == new_ref) {
-		/*
-		 * Cleanup the failed reference here as the target
-		 * could now be dead and have already released its
-		 * references by now. Calling on the new reference
-		 * with strong=0 and a tmp_refs will not decrement
-		 * the node. The new_ref gets kfree'd below.
-		 */
-		binder_cleanup_ref_olocked(new_ref);
-		ref = NULL;
-	}
-
-	binder_proc_unlock(proc);
-	if (new_ref && ref != new_ref)
-		/*
-		 * Another thread created the ref first so
-		 * free the one we allocated
-		 */
-		kfree(new_ref);
-	return ret;
-}
-
-static void binder_pop_transaction_ilocked(struct binder_thread *target_thread,
-					   struct binder_transaction *t)
-{
-	BUG_ON(!target_thread);
-	assert_spin_locked(&target_thread->proc->inner_lock);
-	BUG_ON(target_thread->transaction_stack != t);
-	BUG_ON(target_thread->transaction_stack->from != target_thread);
-	target_thread->transaction_stack =
-		target_thread->transaction_stack->from_parent;
-	t->from = NULL;
-}
-
-/**
- * binder_thread_dec_tmpref() - decrement thread->tmp_ref
- * @thread:	thread to decrement
- *
- * A thread needs to be kept alive while being used to create or
- * handle a transaction. binder_get_txn_from() is used to safely
- * extract t->from from a binder_transaction and keep the thread
- * indicated by t->from from being freed. When done with that
- * binder_thread, this function is called to decrement the
- * tmp_ref and free if appropriate (thread has been released
- * and no transaction being processed by the driver)
- */
-static void binder_thread_dec_tmpref(struct binder_thread *thread)
-{
-	/*
-	 * atomic is used to protect the counter value while
-	 * it cannot reach zero or thread->is_dead is false
-	 */
-	binder_inner_proc_lock(thread->proc);
-	atomic_dec(&thread->tmp_ref);
-	if (thread->is_dead && !atomic_read(&thread->tmp_ref)) {
-		binder_inner_proc_unlock(thread->proc);
-		binder_free_thread(thread);
-		return;
-	}
-	binder_inner_proc_unlock(thread->proc);
-}
-
-/**
- * binder_proc_dec_tmpref() - decrement proc->tmp_ref
- * @proc:	proc to decrement
- *
- * A binder_proc needs to be kept alive while being used to create or
- * handle a transaction. proc->tmp_ref is incremented when
- * creating a new transaction or the binder_proc is currently in-use
- * by threads that are being released. When done with the binder_proc,
- * this function is called to decrement the counter and free the
- * proc if appropriate (proc has been released, all threads have
- * been released and not currenly in-use to process a transaction).
- */
-static void binder_proc_dec_tmpref(struct binder_proc *proc)
-{
-	binder_inner_proc_lock(proc);
-	proc->tmp_ref--;
-	if (proc->is_dead && RB_EMPTY_ROOT(&proc->threads) &&
-			!proc->tmp_ref) {
-		binder_inner_proc_unlock(proc);
-		binder_free_proc(proc);
-		return;
-	}
-	binder_inner_proc_unlock(proc);
-}
-
-/**
- * binder_get_txn_from() - safely extract the "from" thread in transaction
- * @t:	binder transaction for t->from
- *
- * Atomically return the "from" thread and increment the tmp_ref
- * count for the thread to ensure it stays alive until
- * binder_thread_dec_tmpref() is called.
- *
- * Return: the value of t->from
- */
-static struct binder_thread *binder_get_txn_from(
-		struct binder_transaction *t)
-{
-	struct binder_thread *from;
-
-	spin_lock(&t->lock);
-	from = t->from;
-	if (from)
-		atomic_inc(&from->tmp_ref);
-	spin_unlock(&t->lock);
-	return from;
-}
-
-/**
- * binder_get_txn_from_and_acq_inner() - get t->from and acquire inner lock
- * @t:	binder transaction for t->from
- *
- * Same as binder_get_txn_from() except it also acquires the proc->inner_lock
- * to guarantee that the thread cannot be released while operating on it.
- * The caller must call binder_inner_proc_unlock() to release the inner lock
- * as well as call binder_dec_thread_txn() to release the reference.
- *
- * Return: the value of t->from
- */
-static struct binder_thread *binder_get_txn_from_and_acq_inner(
-		struct binder_transaction *t)
-	__acquires(&t->from->proc->inner_lock)
-{
-	struct binder_thread *from;
-
-	from = binder_get_txn_from(t);
-	if (!from) {
-		__acquire(&from->proc->inner_lock);
-		return NULL;
-	}
-	binder_inner_proc_lock(from->proc);
-	if (t->from) {
-		BUG_ON(from != t->from);
-		return from;
-	}
-	binder_inner_proc_unlock(from->proc);
-	__acquire(&from->proc->inner_lock);
-	binder_thread_dec_tmpref(from);
-	return NULL;
-}
-
-/**
- * binder_free_txn_fixups() - free unprocessed fd fixups
- * @t:	binder transaction for t->from
- *
- * If the transaction is being torn down prior to being
- * processed by the target process, free all of the
- * fd fixups and fput the file structs. It is safe to
- * call this function after the fixups have been
- * processed -- in that case, the list will be empty.
- */
-static void binder_free_txn_fixups(struct binder_transaction *t)
-{
-	struct binder_txn_fd_fixup *fixup, *tmp;
-
-	list_for_each_entry_safe(fixup, tmp, &t->fd_fixups, fixup_entry) {
-		fput(fixup->file);
-		if (fixup->target_fd >= 0)
-			put_unused_fd(fixup->target_fd);
-		list_del(&fixup->fixup_entry);
-		kfree(fixup);
-	}
-}
-
-static void binder_txn_latency_free(struct binder_transaction *t)
-{
-	int from_proc, from_thread, to_proc, to_thread;
-
-	spin_lock(&t->lock);
-	from_proc = t->from ? t->from->proc->pid : 0;
-	from_thread = t->from ? t->from->pid : 0;
-	to_proc = t->to_proc ? t->to_proc->pid : 0;
-	to_thread = t->to_thread ? t->to_thread->pid : 0;
-	spin_unlock(&t->lock);
-
-	trace_binder_txn_latency_free(t, from_proc, from_thread, to_proc, to_thread);
-}
-
-static void binder_free_transaction(struct binder_transaction *t)
-{
-	struct binder_proc *target_proc = t->to_proc;
-
-	if (target_proc) {
-		binder_inner_proc_lock(target_proc);
-		target_proc->outstanding_txns--;
-		if (target_proc->outstanding_txns < 0)
-			pr_warn("%s: Unexpected outstanding_txns %d\n",
-				__func__, target_proc->outstanding_txns);
-		if (!target_proc->outstanding_txns && target_proc->is_frozen)
-			wake_up_interruptible_all(&target_proc->freeze_wait);
-		if (t->buffer)
-			t->buffer->transaction = NULL;
-		binder_inner_proc_unlock(target_proc);
-	}
-	if (trace_binder_txn_latency_free_enabled())
-		binder_txn_latency_free(t);
-	/*
-	 * If the transaction has no target_proc, then
-	 * t->buffer->transaction has already been cleared.
-	 */
-	binder_free_txn_fixups(t);
-	kfree(t);
-	binder_stats_deleted(BINDER_STAT_TRANSACTION);
-}
-
-static void binder_send_failed_reply(struct binder_transaction *t,
-				     uint32_t error_code)
-{
-	struct binder_thread *target_thread;
-	struct binder_transaction *next;
-
-	BUG_ON(t->flags & TF_ONE_WAY);
-	while (1) {
-		target_thread = binder_get_txn_from_and_acq_inner(t);
-		if (target_thread) {
-			binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
-				     "send failed reply for transaction %d to %d:%d\n",
-				      t->debug_id,
-				      target_thread->proc->pid,
-				      target_thread->pid);
-
-			binder_pop_transaction_ilocked(target_thread, t);
-			if (target_thread->reply_error.cmd == BR_OK) {
-				target_thread->reply_error.cmd = error_code;
-				binder_enqueue_thread_work_ilocked(
-					target_thread,
-					&target_thread->reply_error.work);
-				wake_up_interruptible(&target_thread->wait);
-			} else {
-				/*
-				 * Cannot get here for normal operation, but
-				 * we can if multiple synchronous transactions
-				 * are sent without blocking for responses.
-				 * Just ignore the 2nd error in this case.
-				 */
-				pr_warn("Unexpected reply error: %u\n",
-					target_thread->reply_error.cmd);
-			}
-			binder_inner_proc_unlock(target_thread->proc);
-			binder_thread_dec_tmpref(target_thread);
-			binder_free_transaction(t);
-			return;
-		}
-		__release(&target_thread->proc->inner_lock);
-		next = t->from_parent;
-
-		binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
-			     "send failed reply for transaction %d, target dead\n",
-			     t->debug_id);
-
-		binder_free_transaction(t);
-		if (next == NULL) {
-			binder_debug(BINDER_DEBUG_DEAD_BINDER,
-				     "reply failed, no target thread at root\n");
-			return;
-		}
-		t = next;
-		binder_debug(BINDER_DEBUG_DEAD_BINDER,
-			     "reply failed, no target thread -- retry %d\n",
-			      t->debug_id);
-	}
-}
-
-/**
- * binder_cleanup_transaction() - cleans up undelivered transaction
- * @t:		transaction that needs to be cleaned up
- * @reason:	reason the transaction wasn't delivered
- * @error_code:	error to return to caller (if synchronous call)
- */
-static void binder_cleanup_transaction(struct binder_transaction *t,
-				       const char *reason,
-				       uint32_t error_code)
-{
-	if (t->buffer->target_node && !(t->flags & TF_ONE_WAY)) {
-		binder_send_failed_reply(t, error_code);
-	} else {
-		binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
-			"undelivered transaction %d, %s\n",
-			t->debug_id, reason);
-		binder_free_transaction(t);
-	}
-}
-
-/**
- * binder_get_object() - gets object and checks for valid metadata
- * @proc:	binder_proc owning the buffer
- * @u:		sender's user pointer to base of buffer
- * @buffer:	binder_buffer that we're parsing.
- * @offset:	offset in the @buffer at which to validate an object.
- * @object:	struct binder_object to read into
- *
- * Copy the binder object at the given offset into @object. If @u is
- * provided then the copy is from the sender's buffer. If not, then
- * it is copied from the target's @buffer.
- *
- * Return:	If there's a valid metadata object at @offset, the
- *		size of that object. Otherwise, it returns zero. The object
- *		is read into the struct binder_object pointed to by @object.
- */
-static size_t binder_get_object(struct binder_proc *proc,
-				const void __user *u,
-				struct binder_buffer *buffer,
-				unsigned long offset,
-				struct binder_object *object)
-{
-	size_t read_size;
-	struct binder_object_header *hdr;
-	size_t object_size = 0;
-
-	read_size = min_t(size_t, sizeof(*object), buffer->data_size - offset);
-	if (offset > buffer->data_size || read_size < sizeof(*hdr))
-		return 0;
-	if (u) {
-		if (copy_from_user(object, u + offset, read_size))
-			return 0;
-	} else {
-		if (binder_alloc_copy_from_buffer(&proc->alloc, object, buffer,
-						  offset, read_size))
-			return 0;
-	}
-
-	/* Ok, now see if we read a complete object. */
-	hdr = &object->hdr;
-	switch (hdr->type) {
-	case BINDER_TYPE_BINDER:
-	case BINDER_TYPE_WEAK_BINDER:
-	case BINDER_TYPE_HANDLE:
-	case BINDER_TYPE_WEAK_HANDLE:
-		object_size = sizeof(struct flat_binder_object);
-		break;
-	case BINDER_TYPE_FD:
-		object_size = sizeof(struct binder_fd_object);
-		break;
-	case BINDER_TYPE_PTR:
-		object_size = sizeof(struct binder_buffer_object);
-		break;
-	case BINDER_TYPE_FDA:
-		object_size = sizeof(struct binder_fd_array_object);
-		break;
-	default:
-		return 0;
-	}
-	if (offset <= buffer->data_size - object_size &&
-	    buffer->data_size >= object_size)
-		return object_size;
-	else
-		return 0;
-}
-
-/**
- * binder_validate_ptr() - validates binder_buffer_object in a binder_buffer.
- * @proc:	binder_proc owning the buffer
- * @b:		binder_buffer containing the object
- * @object:	struct binder_object to read into
- * @index:	index in offset array at which the binder_buffer_object is
- *		located
- * @start_offset: points to the start of the offset array
- * @object_offsetp: offset of @object read from @b
- * @num_valid:	the number of valid offsets in the offset array
- *
- * Return:	If @index is within the valid range of the offset array
- *		described by @start and @num_valid, and if there's a valid
- *		binder_buffer_object at the offset found in index @index
- *		of the offset array, that object is returned. Otherwise,
- *		%NULL is returned.
- *		Note that the offset found in index @index itself is not
- *		verified; this function assumes that @num_valid elements
- *		from @start were previously verified to have valid offsets.
- *		If @object_offsetp is non-NULL, then the offset within
- *		@b is written to it.
- */
-static struct binder_buffer_object *binder_validate_ptr(
-						struct binder_proc *proc,
-						struct binder_buffer *b,
-						struct binder_object *object,
-						binder_size_t index,
-						binder_size_t start_offset,
-						binder_size_t *object_offsetp,
-						binder_size_t num_valid)
-{
-	size_t object_size;
-	binder_size_t object_offset;
-	unsigned long buffer_offset;
-
-	if (index >= num_valid)
-		return NULL;
-
-	buffer_offset = start_offset + sizeof(binder_size_t) * index;
-	if (binder_alloc_copy_from_buffer(&proc->alloc, &object_offset,
-					  b, buffer_offset,
-					  sizeof(object_offset)))
-		return NULL;
-	object_size = binder_get_object(proc, NULL, b, object_offset, object);
-	if (!object_size || object->hdr.type != BINDER_TYPE_PTR)
-		return NULL;
-	if (object_offsetp)
-		*object_offsetp = object_offset;
-
-	return &object->bbo;
-}
-
-/**
- * binder_validate_fixup() - validates pointer/fd fixups happen in order.
- * @proc:		binder_proc owning the buffer
- * @b:			transaction buffer
- * @objects_start_offset: offset to start of objects buffer
- * @buffer_obj_offset:	offset to binder_buffer_object in which to fix up
- * @fixup_offset:	start offset in @buffer to fix up
- * @last_obj_offset:	offset to last binder_buffer_object that we fixed
- * @last_min_offset:	minimum fixup offset in object at @last_obj_offset
- *
- * Return:		%true if a fixup in buffer @buffer at offset @offset is
- *			allowed.
- *
- * For safety reasons, we only allow fixups inside a buffer to happen
- * at increasing offsets; additionally, we only allow fixup on the last
- * buffer object that was verified, or one of its parents.
- *
- * Example of what is allowed:
- *
- * A
- *   B (parent = A, offset = 0)
- *   C (parent = A, offset = 16)
- *     D (parent = C, offset = 0)
- *   E (parent = A, offset = 32) // min_offset is 16 (C.parent_offset)
- *
- * Examples of what is not allowed:
- *
- * Decreasing offsets within the same parent:
- * A
- *   C (parent = A, offset = 16)
- *   B (parent = A, offset = 0) // decreasing offset within A
- *
- * Referring to a parent that wasn't the last object or any of its parents:
- * A
- *   B (parent = A, offset = 0)
- *   C (parent = A, offset = 0)
- *   C (parent = A, offset = 16)
- *     D (parent = B, offset = 0) // B is not A or any of A's parents
- */
-static bool binder_validate_fixup(struct binder_proc *proc,
-				  struct binder_buffer *b,
-				  binder_size_t objects_start_offset,
-				  binder_size_t buffer_obj_offset,
-				  binder_size_t fixup_offset,
-				  binder_size_t last_obj_offset,
-				  binder_size_t last_min_offset)
-{
-	if (!last_obj_offset) {
-		/* Nothing to fix up in */
-		return false;
-	}
-
-	while (last_obj_offset != buffer_obj_offset) {
-		unsigned long buffer_offset;
-		struct binder_object last_object;
-		struct binder_buffer_object *last_bbo;
-		size_t object_size = binder_get_object(proc, NULL, b,
-						       last_obj_offset,
-						       &last_object);
-		if (object_size != sizeof(*last_bbo))
-			return false;
-
-		last_bbo = &last_object.bbo;
-		/*
-		 * Safe to retrieve the parent of last_obj, since it
-		 * was already previously verified by the driver.
-		 */
-		if ((last_bbo->flags & BINDER_BUFFER_FLAG_HAS_PARENT) == 0)
-			return false;
-		last_min_offset = last_bbo->parent_offset + sizeof(uintptr_t);
-		buffer_offset = objects_start_offset +
-			sizeof(binder_size_t) * last_bbo->parent;
-		if (binder_alloc_copy_from_buffer(&proc->alloc,
-						  &last_obj_offset,
-						  b, buffer_offset,
-						  sizeof(last_obj_offset)))
-			return false;
-	}
-	return (fixup_offset >= last_min_offset);
-}
-
-/**
- * struct binder_task_work_cb - for deferred close
- *
- * @twork:                callback_head for task work
- * @fd:                   fd to close
- *
- * Structure to pass task work to be handled after
- * returning from binder_ioctl() via task_work_add().
- */
-struct binder_task_work_cb {
-	struct callback_head twork;
-	struct file *file;
-};
-
-/**
- * binder_do_fd_close() - close list of file descriptors
- * @twork:	callback head for task work
- *
- * It is not safe to call ksys_close() during the binder_ioctl()
- * function if there is a chance that binder's own file descriptor
- * might be closed. This is to meet the requirements for using
- * fdget() (see comments for __fget_light()). Therefore use
- * task_work_add() to schedule the close operation once we have
- * returned from binder_ioctl(). This function is a callback
- * for that mechanism and does the actual ksys_close() on the
- * given file descriptor.
- */
-static void binder_do_fd_close(struct callback_head *twork)
-{
-	struct binder_task_work_cb *twcb = container_of(twork,
-			struct binder_task_work_cb, twork);
-
-	fput(twcb->file);
-	kfree(twcb);
-}
-
-/**
- * binder_deferred_fd_close() - schedule a close for the given file-descriptor
- * @fd:		file-descriptor to close
- *
- * See comments in binder_do_fd_close(). This function is used to schedule
- * a file-descriptor to be closed after returning from binder_ioctl().
- */
-static void binder_deferred_fd_close(int fd)
-{
-	struct binder_task_work_cb *twcb;
-
-	twcb = kzalloc(sizeof(*twcb), GFP_KERNEL);
-	if (!twcb)
-		return;
-	init_task_work(&twcb->twork, binder_do_fd_close);
-	twcb->file = close_fd_get_file(fd);
-	if (twcb->file) {
-		// pin it until binder_do_fd_close(); see comments there
-		get_file(twcb->file);
-		filp_close(twcb->file, current->files);
-		task_work_add(current, &twcb->twork, TWA_RESUME);
-	} else {
-		kfree(twcb);
-	}
-}
-
-static void binder_transaction_buffer_release(struct binder_proc *proc,
-					      struct binder_thread *thread,
-					      struct binder_buffer *buffer,
-					      binder_size_t off_end_offset,
-					      bool is_failure)
-{
-	int debug_id = buffer->debug_id;
-	binder_size_t off_start_offset, buffer_offset;
-
-	binder_debug(BINDER_DEBUG_TRANSACTION,
-		     "%d buffer release %d, size %zd-%zd, failed at %llx\n",
-		     proc->pid, buffer->debug_id,
-		     buffer->data_size, buffer->offsets_size,
-		     (unsigned long long)off_end_offset);
-
-	if (buffer->target_node)
-		binder_dec_node(buffer->target_node, 1, 0);
-
-	off_start_offset = ALIGN(buffer->data_size, sizeof(void *));
-
-	for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
-	     buffer_offset += sizeof(binder_size_t)) {
-		struct binder_object_header *hdr;
-		size_t object_size = 0;
-		struct binder_object object;
-		binder_size_t object_offset;
-
-		if (!binder_alloc_copy_from_buffer(&proc->alloc, &object_offset,
-						   buffer, buffer_offset,
-						   sizeof(object_offset)))
-			object_size = binder_get_object(proc, NULL, buffer,
-							object_offset, &object);
-		if (object_size == 0) {
-			pr_err("transaction release %d bad object at offset %lld, size %zd\n",
-			       debug_id, (u64)object_offset, buffer->data_size);
-			continue;
-		}
-		hdr = &object.hdr;
-		switch (hdr->type) {
-		case BINDER_TYPE_BINDER:
-		case BINDER_TYPE_WEAK_BINDER: {
-			struct flat_binder_object *fp;
-			struct binder_node *node;
-
-			fp = to_flat_binder_object(hdr);
-			node = binder_get_node(proc, fp->binder);
-			if (node == NULL) {
-				pr_err("transaction release %d bad node %016llx\n",
-				       debug_id, (u64)fp->binder);
-				break;
-			}
-			binder_debug(BINDER_DEBUG_TRANSACTION,
-				     "        node %d u%016llx\n",
-				     node->debug_id, (u64)node->ptr);
-			binder_dec_node(node, hdr->type == BINDER_TYPE_BINDER,
-					0);
-			binder_put_node(node);
-		} break;
-		case BINDER_TYPE_HANDLE:
-		case BINDER_TYPE_WEAK_HANDLE: {
-			struct flat_binder_object *fp;
-			struct binder_ref_data rdata;
-			int ret;
-
-			fp = to_flat_binder_object(hdr);
-			ret = binder_dec_ref_for_handle(proc, fp->handle,
-				hdr->type == BINDER_TYPE_HANDLE, &rdata);
-
-			if (ret) {
-				pr_err("transaction release %d bad handle %d, ret = %d\n",
-				 debug_id, fp->handle, ret);
-				break;
-			}
-			binder_debug(BINDER_DEBUG_TRANSACTION,
-				     "        ref %d desc %d\n",
-				     rdata.debug_id, rdata.desc);
-		} break;
-
-		case BINDER_TYPE_FD: {
-			/*
-			 * No need to close the file here since user-space
-			 * closes it for successfully delivered
-			 * transactions. For transactions that weren't
-			 * delivered, the new fd was never allocated so
-			 * there is no need to close and the fput on the
-			 * file is done when the transaction is torn
-			 * down.
-			 */
-		} break;
-		case BINDER_TYPE_PTR:
-			/*
-			 * Nothing to do here, this will get cleaned up when the
-			 * transaction buffer gets freed
-			 */
-			break;
-		case BINDER_TYPE_FDA: {
-			struct binder_fd_array_object *fda;
-			struct binder_buffer_object *parent;
-			struct binder_object ptr_object;
-			binder_size_t fda_offset;
-			size_t fd_index;
-			binder_size_t fd_buf_size;
-			binder_size_t num_valid;
-
-			if (is_failure) {
-				/*
-				 * The fd fixups have not been applied so no
-				 * fds need to be closed.
-				 */
-				continue;
-			}
-
-			num_valid = (buffer_offset - off_start_offset) /
-						sizeof(binder_size_t);
-			fda = to_binder_fd_array_object(hdr);
-			parent = binder_validate_ptr(proc, buffer, &ptr_object,
-						     fda->parent,
-						     off_start_offset,
-						     NULL,
-						     num_valid);
-			if (!parent) {
-				pr_err("transaction release %d bad parent offset\n",
-				       debug_id);
-				continue;
-			}
-			fd_buf_size = sizeof(u32) * fda->num_fds;
-			if (fda->num_fds >= SIZE_MAX / sizeof(u32)) {
-				pr_err("transaction release %d invalid number of fds (%lld)\n",
-				       debug_id, (u64)fda->num_fds);
-				continue;
-			}
-			if (fd_buf_size > parent->length ||
-			    fda->parent_offset > parent->length - fd_buf_size) {
-				/* No space for all file descriptors here. */
-				pr_err("transaction release %d not enough space for %lld fds in buffer\n",
-				       debug_id, (u64)fda->num_fds);
-				continue;
-			}
-			/*
-			 * the source data for binder_buffer_object is visible
-			 * to user-space and the @buffer element is the user
-			 * pointer to the buffer_object containing the fd_array.
-			 * Convert the address to an offset relative to
-			 * the base of the transaction buffer.
-			 */
-			fda_offset =
-			    (parent->buffer - (uintptr_t)buffer->user_data) +
-			    fda->parent_offset;
-			for (fd_index = 0; fd_index < fda->num_fds;
-			     fd_index++) {
-				u32 fd;
-				int err;
-				binder_size_t offset = fda_offset +
-					fd_index * sizeof(fd);
-
-				err = binder_alloc_copy_from_buffer(
-						&proc->alloc, &fd, buffer,
-						offset, sizeof(fd));
-				WARN_ON(err);
-				if (!err) {
-					binder_deferred_fd_close(fd);
-					/*
-					 * Need to make sure the thread goes
-					 * back to userspace to complete the
-					 * deferred close
-					 */
-					if (thread)
-						thread->looper_need_return = true;
-				}
-			}
-		} break;
-		default:
-			pr_err("transaction release %d bad object type %x\n",
-				debug_id, hdr->type);
-			break;
-		}
-	}
-}
-
-/* Clean up all the objects in the buffer */
-static inline void binder_release_entire_buffer(struct binder_proc *proc,
-						struct binder_thread *thread,
-						struct binder_buffer *buffer,
-						bool is_failure)
-{
-	binder_size_t off_end_offset;
-
-	off_end_offset = ALIGN(buffer->data_size, sizeof(void *));
-	off_end_offset += buffer->offsets_size;
-
-	binder_transaction_buffer_release(proc, thread, buffer,
-					  off_end_offset, is_failure);
-}
-
-static int binder_translate_binder(struct flat_binder_object *fp,
-				   struct binder_transaction *t,
-				   struct binder_thread *thread)
-{
-	struct binder_node *node;
-	struct binder_proc *proc = thread->proc;
-	struct binder_proc *target_proc = t->to_proc;
-	struct binder_ref_data rdata;
-	int ret = 0;
-
-	node = binder_get_node(proc, fp->binder);
-	if (!node) {
-		node = binder_new_node(proc, fp);
-		if (!node)
-			return -ENOMEM;
-	}
-	if (fp->cookie != node->cookie) {
-		binder_user_error("%d:%d sending u%016llx node %d, cookie mismatch %016llx != %016llx\n",
-				  proc->pid, thread->pid, (u64)fp->binder,
-				  node->debug_id, (u64)fp->cookie,
-				  (u64)node->cookie);
-		ret = -EINVAL;
-		goto done;
-	}
-	if (security_binder_transfer_binder(proc->cred, target_proc->cred)) {
-		ret = -EPERM;
-		goto done;
-	}
-
-	ret = binder_inc_ref_for_node(target_proc, node,
-			fp->hdr.type == BINDER_TYPE_BINDER,
-			&thread->todo, &rdata);
-	if (ret)
-		goto done;
-
-	if (fp->hdr.type == BINDER_TYPE_BINDER)
-		fp->hdr.type = BINDER_TYPE_HANDLE;
-	else
-		fp->hdr.type = BINDER_TYPE_WEAK_HANDLE;
-	fp->binder = 0;
-	fp->handle = rdata.desc;
-	fp->cookie = 0;
-
-	trace_binder_transaction_node_to_ref(t, node, &rdata);
-	binder_debug(BINDER_DEBUG_TRANSACTION,
-		     "        node %d u%016llx -> ref %d desc %d\n",
-		     node->debug_id, (u64)node->ptr,
-		     rdata.debug_id, rdata.desc);
-done:
-	binder_put_node(node);
-	return ret;
-}
-
-static int binder_translate_handle(struct flat_binder_object *fp,
-				   struct binder_transaction *t,
-				   struct binder_thread *thread)
-{
-	struct binder_proc *proc = thread->proc;
-	struct binder_proc *target_proc = t->to_proc;
-	struct binder_node *node;
-	struct binder_ref_data src_rdata;
-	int ret = 0;
-
-	node = binder_get_node_from_ref(proc, fp->handle,
-			fp->hdr.type == BINDER_TYPE_HANDLE, &src_rdata);
-	if (!node) {
-		binder_user_error("%d:%d got transaction with invalid handle, %d\n",
-				  proc->pid, thread->pid, fp->handle);
-		return -EINVAL;
-	}
-	if (security_binder_transfer_binder(proc->cred, target_proc->cred)) {
-		ret = -EPERM;
-		goto done;
-	}
-
-	binder_node_lock(node);
-	if (node->proc == target_proc) {
-		if (fp->hdr.type == BINDER_TYPE_HANDLE)
-			fp->hdr.type = BINDER_TYPE_BINDER;
-		else
-			fp->hdr.type = BINDER_TYPE_WEAK_BINDER;
-		fp->binder = node->ptr;
-		fp->cookie = node->cookie;
-		if (node->proc)
-			binder_inner_proc_lock(node->proc);
-		else
-			__acquire(&node->proc->inner_lock);
-		binder_inc_node_nilocked(node,
-					 fp->hdr.type == BINDER_TYPE_BINDER,
-					 0, NULL);
-		if (node->proc)
-			binder_inner_proc_unlock(node->proc);
-		else
-			__release(&node->proc->inner_lock);
-		trace_binder_transaction_ref_to_node(t, node, &src_rdata);
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "        ref %d desc %d -> node %d u%016llx\n",
-			     src_rdata.debug_id, src_rdata.desc, node->debug_id,
-			     (u64)node->ptr);
-		binder_node_unlock(node);
-	} else {
-		struct binder_ref_data dest_rdata;
-
-		binder_node_unlock(node);
-		ret = binder_inc_ref_for_node(target_proc, node,
-				fp->hdr.type == BINDER_TYPE_HANDLE,
-				NULL, &dest_rdata);
-		if (ret)
-			goto done;
-
-		fp->binder = 0;
-		fp->handle = dest_rdata.desc;
-		fp->cookie = 0;
-		trace_binder_transaction_ref_to_ref(t, node, &src_rdata,
-						    &dest_rdata);
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "        ref %d desc %d -> ref %d desc %d (node %d)\n",
-			     src_rdata.debug_id, src_rdata.desc,
-			     dest_rdata.debug_id, dest_rdata.desc,
-			     node->debug_id);
-	}
-done:
-	binder_put_node(node);
-	return ret;
-}
-
-static int binder_translate_fd(u32 fd, binder_size_t fd_offset,
-			       struct binder_transaction *t,
-			       struct binder_thread *thread,
-			       struct binder_transaction *in_reply_to)
-{
-	struct binder_proc *proc = thread->proc;
-	struct binder_proc *target_proc = t->to_proc;
-	struct binder_txn_fd_fixup *fixup;
-	struct file *file;
-	int ret = 0;
-	bool target_allows_fd;
-
-	if (in_reply_to)
-		target_allows_fd = !!(in_reply_to->flags & TF_ACCEPT_FDS);
-	else
-		target_allows_fd = t->buffer->target_node->accept_fds;
-	if (!target_allows_fd) {
-		binder_user_error("%d:%d got %s with fd, %d, but target does not allow fds\n",
-				  proc->pid, thread->pid,
-				  in_reply_to ? "reply" : "transaction",
-				  fd);
-		ret = -EPERM;
-		goto err_fd_not_accepted;
-	}
-
-	file = fget(fd);
-	if (!file) {
-		binder_user_error("%d:%d got transaction with invalid fd, %d\n",
-				  proc->pid, thread->pid, fd);
-		ret = -EBADF;
-		goto err_fget;
-	}
-	ret = security_binder_transfer_file(proc->cred, target_proc->cred, file);
-	if (ret < 0) {
-		ret = -EPERM;
-		goto err_security;
-	}
-
-	/*
-	 * Add fixup record for this transaction. The allocation
-	 * of the fd in the target needs to be done from a
-	 * target thread.
-	 */
-	fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
-	if (!fixup) {
-		ret = -ENOMEM;
-		goto err_alloc;
-	}
-	fixup->file = file;
-	fixup->offset = fd_offset;
-	fixup->target_fd = -1;
-	trace_binder_transaction_fd_send(t, fd, fixup->offset);
-	list_add_tail(&fixup->fixup_entry, &t->fd_fixups);
-
-	return ret;
-
-err_alloc:
-err_security:
-	fput(file);
-err_fget:
-err_fd_not_accepted:
-	return ret;
-}
-
-/**
- * struct binder_ptr_fixup - data to be fixed-up in target buffer
- * @offset	offset in target buffer to fixup
- * @skip_size	bytes to skip in copy (fixup will be written later)
- * @fixup_data	data to write at fixup offset
- * @node	list node
- *
- * This is used for the pointer fixup list (pf) which is created and consumed
- * during binder_transaction() and is only accessed locally. No
- * locking is necessary.
- *
- * The list is ordered by @offset.
- */
-struct binder_ptr_fixup {
-	binder_size_t offset;
-	size_t skip_size;
-	binder_uintptr_t fixup_data;
-	struct list_head node;
-};
-
-/**
- * struct binder_sg_copy - scatter-gather data to be copied
- * @offset		offset in target buffer
- * @sender_uaddr	user address in source buffer
- * @length		bytes to copy
- * @node		list node
- *
- * This is used for the sg copy list (sgc) which is created and consumed
- * during binder_transaction() and is only accessed locally. No
- * locking is necessary.
- *
- * The list is ordered by @offset.
- */
-struct binder_sg_copy {
-	binder_size_t offset;
-	const void __user *sender_uaddr;
-	size_t length;
-	struct list_head node;
-};
-
-/**
- * binder_do_deferred_txn_copies() - copy and fixup scatter-gather data
- * @alloc:	binder_alloc associated with @buffer
- * @buffer:	binder buffer in target process
- * @sgc_head:	list_head of scatter-gather copy list
- * @pf_head:	list_head of pointer fixup list
- *
- * Processes all elements of @sgc_head, applying fixups from @pf_head
- * and copying the scatter-gather data from the source process' user
- * buffer to the target's buffer. It is expected that the list creation
- * and processing all occurs during binder_transaction() so these lists
- * are only accessed in local context.
- *
- * Return: 0=success, else -errno
- */
-static int binder_do_deferred_txn_copies(struct binder_alloc *alloc,
-					 struct binder_buffer *buffer,
-					 struct list_head *sgc_head,
-					 struct list_head *pf_head)
-{
-	int ret = 0;
-	struct binder_sg_copy *sgc, *tmpsgc;
-	struct binder_ptr_fixup *tmppf;
-	struct binder_ptr_fixup *pf =
-		list_first_entry_or_null(pf_head, struct binder_ptr_fixup,
-					 node);
-
-	list_for_each_entry_safe(sgc, tmpsgc, sgc_head, node) {
-		size_t bytes_copied = 0;
-
-		while (bytes_copied < sgc->length) {
-			size_t copy_size;
-			size_t bytes_left = sgc->length - bytes_copied;
-			size_t offset = sgc->offset + bytes_copied;
-
-			/*
-			 * We copy up to the fixup (pointed to by pf)
-			 */
-			copy_size = pf ? min(bytes_left, (size_t)pf->offset - offset)
-				       : bytes_left;
-			if (!ret && copy_size)
-				ret = binder_alloc_copy_user_to_buffer(
-						alloc, buffer,
-						offset,
-						sgc->sender_uaddr + bytes_copied,
-						copy_size);
-			bytes_copied += copy_size;
-			if (copy_size != bytes_left) {
-				BUG_ON(!pf);
-				/* we stopped at a fixup offset */
-				if (pf->skip_size) {
-					/*
-					 * we are just skipping. This is for
-					 * BINDER_TYPE_FDA where the translated
-					 * fds will be fixed up when we get
-					 * to target context.
-					 */
-					bytes_copied += pf->skip_size;
-				} else {
-					/* apply the fixup indicated by pf */
-					if (!ret)
-						ret = binder_alloc_copy_to_buffer(
-							alloc, buffer,
-							pf->offset,
-							&pf->fixup_data,
-							sizeof(pf->fixup_data));
-					bytes_copied += sizeof(pf->fixup_data);
-				}
-				list_del(&pf->node);
-				kfree(pf);
-				pf = list_first_entry_or_null(pf_head,
-						struct binder_ptr_fixup, node);
-			}
-		}
-		list_del(&sgc->node);
-		kfree(sgc);
-	}
-	list_for_each_entry_safe(pf, tmppf, pf_head, node) {
-		BUG_ON(pf->skip_size == 0);
-		list_del(&pf->node);
-		kfree(pf);
-	}
-	BUG_ON(!list_empty(sgc_head));
-
-	return ret > 0 ? -EINVAL : ret;
-}
-
-/**
- * binder_cleanup_deferred_txn_lists() - free specified lists
- * @sgc_head:	list_head of scatter-gather copy list
- * @pf_head:	list_head of pointer fixup list
- *
- * Called to clean up @sgc_head and @pf_head if there is an
- * error.
- */
-static void binder_cleanup_deferred_txn_lists(struct list_head *sgc_head,
-					      struct list_head *pf_head)
-{
-	struct binder_sg_copy *sgc, *tmpsgc;
-	struct binder_ptr_fixup *pf, *tmppf;
-
-	list_for_each_entry_safe(sgc, tmpsgc, sgc_head, node) {
-		list_del(&sgc->node);
-		kfree(sgc);
-	}
-	list_for_each_entry_safe(pf, tmppf, pf_head, node) {
-		list_del(&pf->node);
-		kfree(pf);
-	}
-}
-
-/**
- * binder_defer_copy() - queue a scatter-gather buffer for copy
- * @sgc_head:		list_head of scatter-gather copy list
- * @offset:		binder buffer offset in target process
- * @sender_uaddr:	user address in source process
- * @length:		bytes to copy
- *
- * Specify a scatter-gather block to be copied. The actual copy must
- * be deferred until all the needed fixups are identified and queued.
- * Then the copy and fixups are done together so un-translated values
- * from the source are never visible in the target buffer.
- *
- * We are guaranteed that repeated calls to this function will have
- * monotonically increasing @offset values so the list will naturally
- * be ordered.
- *
- * Return: 0=success, else -errno
- */
-static int binder_defer_copy(struct list_head *sgc_head, binder_size_t offset,
-			     const void __user *sender_uaddr, size_t length)
-{
-	struct binder_sg_copy *bc = kzalloc(sizeof(*bc), GFP_KERNEL);
-
-	if (!bc)
-		return -ENOMEM;
-
-	bc->offset = offset;
-	bc->sender_uaddr = sender_uaddr;
-	bc->length = length;
-	INIT_LIST_HEAD(&bc->node);
-
-	/*
-	 * We are guaranteed that the deferred copies are in-order
-	 * so just add to the tail.
-	 */
-	list_add_tail(&bc->node, sgc_head);
-
-	return 0;
-}
-
-/**
- * binder_add_fixup() - queue a fixup to be applied to sg copy
- * @pf_head:	list_head of binder ptr fixup list
- * @offset:	binder buffer offset in target process
- * @fixup:	bytes to be copied for fixup
- * @skip_size:	bytes to skip when copying (fixup will be applied later)
- *
- * Add the specified fixup to a list ordered by @offset. When copying
- * the scatter-gather buffers, the fixup will be copied instead of
- * data from the source buffer. For BINDER_TYPE_FDA fixups, the fixup
- * will be applied later (in target process context), so we just skip
- * the bytes specified by @skip_size. If @skip_size is 0, we copy the
- * value in @fixup.
- *
- * This function is called *mostly* in @offset order, but there are
- * exceptions. Since out-of-order inserts are relatively uncommon,
- * we insert the new element by searching backward from the tail of
- * the list.
- *
- * Return: 0=success, else -errno
- */
-static int binder_add_fixup(struct list_head *pf_head, binder_size_t offset,
-			    binder_uintptr_t fixup, size_t skip_size)
-{
-	struct binder_ptr_fixup *pf = kzalloc(sizeof(*pf), GFP_KERNEL);
-	struct binder_ptr_fixup *tmppf;
-
-	if (!pf)
-		return -ENOMEM;
-
-	pf->offset = offset;
-	pf->fixup_data = fixup;
-	pf->skip_size = skip_size;
-	INIT_LIST_HEAD(&pf->node);
-
-	/* Fixups are *mostly* added in-order, but there are some
-	 * exceptions. Look backwards through list for insertion point.
-	 */
-	list_for_each_entry_reverse(tmppf, pf_head, node) {
-		if (tmppf->offset < pf->offset) {
-			list_add(&pf->node, &tmppf->node);
-			return 0;
-		}
-	}
-	/*
-	 * if we get here, then the new offset is the lowest so
-	 * insert at the head
-	 */
-	list_add(&pf->node, pf_head);
-	return 0;
-}
-
-static int binder_translate_fd_array(struct list_head *pf_head,
-				     struct binder_fd_array_object *fda,
-				     const void __user *sender_ubuffer,
-				     struct binder_buffer_object *parent,
-				     struct binder_buffer_object *sender_uparent,
-				     struct binder_transaction *t,
-				     struct binder_thread *thread,
-				     struct binder_transaction *in_reply_to)
-{
-	binder_size_t fdi, fd_buf_size;
-	binder_size_t fda_offset;
-	const void __user *sender_ufda_base;
-	struct binder_proc *proc = thread->proc;
-	int ret;
-
-	if (fda->num_fds == 0)
-		return 0;
-
-	fd_buf_size = sizeof(u32) * fda->num_fds;
-	if (fda->num_fds >= SIZE_MAX / sizeof(u32)) {
-		binder_user_error("%d:%d got transaction with invalid number of fds (%lld)\n",
-				  proc->pid, thread->pid, (u64)fda->num_fds);
-		return -EINVAL;
-	}
-	if (fd_buf_size > parent->length ||
-	    fda->parent_offset > parent->length - fd_buf_size) {
-		/* No space for all file descriptors here. */
-		binder_user_error("%d:%d not enough space to store %lld fds in buffer\n",
-				  proc->pid, thread->pid, (u64)fda->num_fds);
-		return -EINVAL;
-	}
-	/*
-	 * the source data for binder_buffer_object is visible
-	 * to user-space and the @buffer element is the user
-	 * pointer to the buffer_object containing the fd_array.
-	 * Convert the address to an offset relative to
-	 * the base of the transaction buffer.
-	 */
-	fda_offset = (parent->buffer - (uintptr_t)t->buffer->user_data) +
-		fda->parent_offset;
-	sender_ufda_base = (void __user *)(uintptr_t)sender_uparent->buffer +
-				fda->parent_offset;
-
-	if (!IS_ALIGNED((unsigned long)fda_offset, sizeof(u32)) ||
-	    !IS_ALIGNED((unsigned long)sender_ufda_base, sizeof(u32))) {
-		binder_user_error("%d:%d parent offset not aligned correctly.\n",
-				  proc->pid, thread->pid);
-		return -EINVAL;
-	}
-	ret = binder_add_fixup(pf_head, fda_offset, 0, fda->num_fds * sizeof(u32));
-	if (ret)
-		return ret;
-
-	for (fdi = 0; fdi < fda->num_fds; fdi++) {
-		u32 fd;
-		binder_size_t offset = fda_offset + fdi * sizeof(fd);
-		binder_size_t sender_uoffset = fdi * sizeof(fd);
-
-		ret = copy_from_user(&fd, sender_ufda_base + sender_uoffset, sizeof(fd));
-		if (!ret)
-			ret = binder_translate_fd(fd, offset, t, thread,
-						  in_reply_to);
-		if (ret)
-			return ret > 0 ? -EINVAL : ret;
-	}
-	return 0;
-}
-
-static int binder_fixup_parent(struct list_head *pf_head,
-			       struct binder_transaction *t,
-			       struct binder_thread *thread,
-			       struct binder_buffer_object *bp,
-			       binder_size_t off_start_offset,
-			       binder_size_t num_valid,
-			       binder_size_t last_fixup_obj_off,
-			       binder_size_t last_fixup_min_off)
-{
-	struct binder_buffer_object *parent;
-	struct binder_buffer *b = t->buffer;
-	struct binder_proc *proc = thread->proc;
-	struct binder_proc *target_proc = t->to_proc;
-	struct binder_object object;
-	binder_size_t buffer_offset;
-	binder_size_t parent_offset;
-
-	if (!(bp->flags & BINDER_BUFFER_FLAG_HAS_PARENT))
-		return 0;
-
-	parent = binder_validate_ptr(target_proc, b, &object, bp->parent,
-				     off_start_offset, &parent_offset,
-				     num_valid);
-	if (!parent) {
-		binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
-				  proc->pid, thread->pid);
-		return -EINVAL;
-	}
-
-	if (!binder_validate_fixup(target_proc, b, off_start_offset,
-				   parent_offset, bp->parent_offset,
-				   last_fixup_obj_off,
-				   last_fixup_min_off)) {
-		binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
-				  proc->pid, thread->pid);
-		return -EINVAL;
-	}
-
-	if (parent->length < sizeof(binder_uintptr_t) ||
-	    bp->parent_offset > parent->length - sizeof(binder_uintptr_t)) {
-		/* No space for a pointer here! */
-		binder_user_error("%d:%d got transaction with invalid parent offset\n",
-				  proc->pid, thread->pid);
-		return -EINVAL;
-	}
-	buffer_offset = bp->parent_offset +
-			(uintptr_t)parent->buffer - (uintptr_t)b->user_data;
-	return binder_add_fixup(pf_head, buffer_offset, bp->buffer, 0);
-}
-
-/**
- * binder_can_update_transaction() - Can a txn be superseded by an updated one?
- * @t1: the pending async txn in the frozen process
- * @t2: the new async txn to supersede the outdated pending one
- *
- * Return:  true if t2 can supersede t1
- *          false if t2 can not supersede t1
- */
-static bool binder_can_update_transaction(struct binder_transaction *t1,
-					  struct binder_transaction *t2)
-{
-	if ((t1->flags & t2->flags & (TF_ONE_WAY | TF_UPDATE_TXN)) !=
-	    (TF_ONE_WAY | TF_UPDATE_TXN) || !t1->to_proc || !t2->to_proc)
-		return false;
-	if (t1->to_proc->tsk == t2->to_proc->tsk && t1->code == t2->code &&
-	    t1->flags == t2->flags && t1->buffer->pid == t2->buffer->pid &&
-	    t1->buffer->target_node->ptr == t2->buffer->target_node->ptr &&
-	    t1->buffer->target_node->cookie == t2->buffer->target_node->cookie)
-		return true;
-	return false;
-}
-
-/**
- * binder_find_outdated_transaction_ilocked() - Find the outdated transaction
- * @t:		 new async transaction
- * @target_list: list to find outdated transaction
- *
- * Return: the outdated transaction if found
- *         NULL if no outdated transacton can be found
- *
- * Requires the proc->inner_lock to be held.
- */
-static struct binder_transaction *
-binder_find_outdated_transaction_ilocked(struct binder_transaction *t,
-					 struct list_head *target_list)
-{
-	struct binder_work *w;
-
-	list_for_each_entry(w, target_list, entry) {
-		struct binder_transaction *t_queued;
-
-		if (w->type != BINDER_WORK_TRANSACTION)
-			continue;
-		t_queued = container_of(w, struct binder_transaction, work);
-		if (binder_can_update_transaction(t_queued, t))
-			return t_queued;
-	}
-	return NULL;
-}
-
-/**
- * binder_proc_transaction() - sends a transaction to a process and wakes it up
- * @t:		transaction to send
- * @proc:	process to send the transaction to
- * @thread:	thread in @proc to send the transaction to (may be NULL)
- *
- * This function queues a transaction to the specified process. It will try
- * to find a thread in the target process to handle the transaction and
- * wake it up. If no thread is found, the work is queued to the proc
- * waitqueue.
- *
- * If the @thread parameter is not NULL, the transaction is always queued
- * to the waitlist of that specific thread.
- *
- * Return:	0 if the transaction was successfully queued
- *		BR_DEAD_REPLY if the target process or thread is dead
- *		BR_FROZEN_REPLY if the target process or thread is frozen and
- *			the sync transaction was rejected
- *		BR_TRANSACTION_PENDING_FROZEN if the target process is frozen
- *		and the async transaction was successfully queued
- */
-static int binder_proc_transaction(struct binder_transaction *t,
-				    struct binder_proc *proc,
-				    struct binder_thread *thread)
-{
-	struct binder_node *node = t->buffer->target_node;
-	bool oneway = !!(t->flags & TF_ONE_WAY);
-	bool pending_async = false;
-	struct binder_transaction *t_outdated = NULL;
-	bool frozen = false;
-
-	BUG_ON(!node);
-	binder_node_lock(node);
-	if (oneway) {
-		BUG_ON(thread);
-		if (node->has_async_transaction)
-			pending_async = true;
-		else
-			node->has_async_transaction = true;
-	}
-
-	binder_inner_proc_lock(proc);
-	if (proc->is_frozen) {
-		frozen = true;
-		proc->sync_recv |= !oneway;
-		proc->async_recv |= oneway;
-	}
-
-	if ((frozen && !oneway) || proc->is_dead ||
-			(thread && thread->is_dead)) {
-		binder_inner_proc_unlock(proc);
-		binder_node_unlock(node);
-		return frozen ? BR_FROZEN_REPLY : BR_DEAD_REPLY;
-	}
-
-	if (!thread && !pending_async)
-		thread = binder_select_thread_ilocked(proc);
-
-	if (thread) {
-		binder_enqueue_thread_work_ilocked(thread, &t->work);
-	} else if (!pending_async) {
-		binder_enqueue_work_ilocked(&t->work, &proc->todo);
-	} else {
-		if ((t->flags & TF_UPDATE_TXN) && frozen) {
-			t_outdated = binder_find_outdated_transaction_ilocked(t,
-									      &node->async_todo);
-			if (t_outdated) {
-				binder_debug(BINDER_DEBUG_TRANSACTION,
-					     "txn %d supersedes %d\n",
-					     t->debug_id, t_outdated->debug_id);
-				list_del_init(&t_outdated->work.entry);
-				proc->outstanding_txns--;
-			}
-		}
-		binder_enqueue_work_ilocked(&t->work, &node->async_todo);
-	}
-
-	if (!pending_async)
-		binder_wakeup_thread_ilocked(proc, thread, !oneway /* sync */);
-
-	proc->outstanding_txns++;
-	binder_inner_proc_unlock(proc);
-	binder_node_unlock(node);
-
-	/*
-	 * To reduce potential contention, free the outdated transaction and
-	 * buffer after releasing the locks.
-	 */
-	if (t_outdated) {
-		struct binder_buffer *buffer = t_outdated->buffer;
-
-		t_outdated->buffer = NULL;
-		buffer->transaction = NULL;
-		trace_binder_transaction_update_buffer_release(buffer);
-		binder_release_entire_buffer(proc, NULL, buffer, false);
-		binder_alloc_free_buf(&proc->alloc, buffer);
-		kfree(t_outdated);
-		binder_stats_deleted(BINDER_STAT_TRANSACTION);
-	}
-
-	if (oneway && frozen)
-		return BR_TRANSACTION_PENDING_FROZEN;
-
-	return 0;
-}
-
-/**
- * binder_get_node_refs_for_txn() - Get required refs on node for txn
- * @node:         struct binder_node for which to get refs
- * @procp:        returns @node->proc if valid
- * @error:        if no @procp then returns BR_DEAD_REPLY
- *
- * User-space normally keeps the node alive when creating a transaction
- * since it has a reference to the target. The local strong ref keeps it
- * alive if the sending process dies before the target process processes
- * the transaction. If the source process is malicious or has a reference
- * counting bug, relying on the local strong ref can fail.
- *
- * Since user-space can cause the local strong ref to go away, we also take
- * a tmpref on the node to ensure it survives while we are constructing
- * the transaction. We also need a tmpref on the proc while we are
- * constructing the transaction, so we take that here as well.
- *
- * Return: The target_node with refs taken or NULL if no @node->proc is NULL.
- * Also sets @procp if valid. If the @node->proc is NULL indicating that the
- * target proc has died, @error is set to BR_DEAD_REPLY.
- */
-static struct binder_node *binder_get_node_refs_for_txn(
-		struct binder_node *node,
-		struct binder_proc **procp,
-		uint32_t *error)
-{
-	struct binder_node *target_node = NULL;
-
-	binder_node_inner_lock(node);
-	if (node->proc) {
-		target_node = node;
-		binder_inc_node_nilocked(node, 1, 0, NULL);
-		binder_inc_node_tmpref_ilocked(node);
-		node->proc->tmp_ref++;
-		*procp = node->proc;
-	} else
-		*error = BR_DEAD_REPLY;
-	binder_node_inner_unlock(node);
-
-	return target_node;
-}
-
-static void binder_set_txn_from_error(struct binder_transaction *t, int id,
-				      uint32_t command, int32_t param)
-{
-	struct binder_thread *from = binder_get_txn_from_and_acq_inner(t);
-
-	if (!from) {
-		/* annotation for sparse */
-		__release(&from->proc->inner_lock);
-		return;
-	}
-
-	/* don't override existing errors */
-	if (from->ee.command == BR_OK)
-		binder_set_extended_error(&from->ee, id, command, param);
-	binder_inner_proc_unlock(from->proc);
-	binder_thread_dec_tmpref(from);
-}
-
-static void binder_transaction(struct binder_proc *proc,
-			       struct binder_thread *thread,
-			       struct binder_transaction_data *tr, int reply,
-			       binder_size_t extra_buffers_size)
-{
-	int ret;
-	struct binder_transaction *t;
-	struct binder_work *w;
-	struct binder_work *tcomplete;
-	binder_size_t buffer_offset = 0;
-	binder_size_t off_start_offset, off_end_offset;
-	binder_size_t off_min;
-	binder_size_t sg_buf_offset, sg_buf_end_offset;
-	binder_size_t user_offset = 0;
-	struct binder_proc *target_proc = NULL;
-	struct binder_thread *target_thread = NULL;
-	struct binder_node *target_node = NULL;
-	struct binder_transaction *in_reply_to = NULL;
-	struct binder_transaction_log_entry *e;
-	uint32_t return_error = 0;
-	uint32_t return_error_param = 0;
-	uint32_t return_error_line = 0;
-	binder_size_t last_fixup_obj_off = 0;
-	binder_size_t last_fixup_min_off = 0;
-	struct binder_context *context = proc->context;
-	int t_debug_id = atomic_inc_return(&binder_last_id);
-	ktime_t t_start_time = ktime_get();
-	char *secctx = NULL;
-	u32 secctx_sz = 0;
-	struct list_head sgc_head;
-	struct list_head pf_head;
-	const void __user *user_buffer = (const void __user *)
-				(uintptr_t)tr->data.ptr.buffer;
-	INIT_LIST_HEAD(&sgc_head);
-	INIT_LIST_HEAD(&pf_head);
-
-	e = binder_transaction_log_add(&binder_transaction_log);
-	e->debug_id = t_debug_id;
-	e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY);
-	e->from_proc = proc->pid;
-	e->from_thread = thread->pid;
-	e->target_handle = tr->target.handle;
-	e->data_size = tr->data_size;
-	e->offsets_size = tr->offsets_size;
-	strscpy(e->context_name, proc->context->name, BINDERFS_MAX_NAME);
-
-	binder_inner_proc_lock(proc);
-	binder_set_extended_error(&thread->ee, t_debug_id, BR_OK, 0);
-	binder_inner_proc_unlock(proc);
-
-	if (reply) {
-		binder_inner_proc_lock(proc);
-		in_reply_to = thread->transaction_stack;
-		if (in_reply_to == NULL) {
-			binder_inner_proc_unlock(proc);
-			binder_user_error("%d:%d got reply transaction with no transaction stack\n",
-					  proc->pid, thread->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EPROTO;
-			return_error_line = __LINE__;
-			goto err_empty_call_stack;
-		}
-		if (in_reply_to->to_thread != thread) {
-			spin_lock(&in_reply_to->lock);
-			binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n",
-				proc->pid, thread->pid, in_reply_to->debug_id,
-				in_reply_to->to_proc ?
-				in_reply_to->to_proc->pid : 0,
-				in_reply_to->to_thread ?
-				in_reply_to->to_thread->pid : 0);
-			spin_unlock(&in_reply_to->lock);
-			binder_inner_proc_unlock(proc);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EPROTO;
-			return_error_line = __LINE__;
-			in_reply_to = NULL;
-			goto err_bad_call_stack;
-		}
-		thread->transaction_stack = in_reply_to->to_parent;
-		binder_inner_proc_unlock(proc);
-		binder_set_nice(in_reply_to->saved_priority);
-		target_thread = binder_get_txn_from_and_acq_inner(in_reply_to);
-		if (target_thread == NULL) {
-			/* annotation for sparse */
-			__release(&target_thread->proc->inner_lock);
-			binder_txn_error("%d:%d reply target not found\n",
-				thread->pid, proc->pid);
-			return_error = BR_DEAD_REPLY;
-			return_error_line = __LINE__;
-			goto err_dead_binder;
-		}
-		if (target_thread->transaction_stack != in_reply_to) {
-			binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n",
-				proc->pid, thread->pid,
-				target_thread->transaction_stack ?
-				target_thread->transaction_stack->debug_id : 0,
-				in_reply_to->debug_id);
-			binder_inner_proc_unlock(target_thread->proc);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EPROTO;
-			return_error_line = __LINE__;
-			in_reply_to = NULL;
-			target_thread = NULL;
-			goto err_dead_binder;
-		}
-		target_proc = target_thread->proc;
-		target_proc->tmp_ref++;
-		binder_inner_proc_unlock(target_thread->proc);
-	} else {
-		if (tr->target.handle) {
-			struct binder_ref *ref;
-
-			/*
-			 * There must already be a strong ref
-			 * on this node. If so, do a strong
-			 * increment on the node to ensure it
-			 * stays alive until the transaction is
-			 * done.
-			 */
-			binder_proc_lock(proc);
-			ref = binder_get_ref_olocked(proc, tr->target.handle,
-						     true);
-			if (ref) {
-				target_node = binder_get_node_refs_for_txn(
-						ref->node, &target_proc,
-						&return_error);
-			} else {
-				binder_user_error("%d:%d got transaction to invalid handle, %u\n",
-						  proc->pid, thread->pid, tr->target.handle);
-				return_error = BR_FAILED_REPLY;
-			}
-			binder_proc_unlock(proc);
-		} else {
-			mutex_lock(&context->context_mgr_node_lock);
-			target_node = context->binder_context_mgr_node;
-			if (target_node)
-				target_node = binder_get_node_refs_for_txn(
-						target_node, &target_proc,
-						&return_error);
-			else
-				return_error = BR_DEAD_REPLY;
-			mutex_unlock(&context->context_mgr_node_lock);
-			if (target_node && target_proc->pid == proc->pid) {
-				binder_user_error("%d:%d got transaction to context manager from process owning it\n",
-						  proc->pid, thread->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EINVAL;
-				return_error_line = __LINE__;
-				goto err_invalid_target_handle;
-			}
-		}
-		if (!target_node) {
-			binder_txn_error("%d:%d cannot find target node\n",
-				thread->pid, proc->pid);
-			/*
-			 * return_error is set above
-			 */
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_dead_binder;
-		}
-		e->to_node = target_node->debug_id;
-		if (WARN_ON(proc == target_proc)) {
-			binder_txn_error("%d:%d self transactions not allowed\n",
-				thread->pid, proc->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_invalid_target_handle;
-		}
-		if (security_binder_transaction(proc->cred,
-						target_proc->cred) < 0) {
-			binder_txn_error("%d:%d transaction credentials failed\n",
-				thread->pid, proc->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EPERM;
-			return_error_line = __LINE__;
-			goto err_invalid_target_handle;
-		}
-		binder_inner_proc_lock(proc);
-
-		w = list_first_entry_or_null(&thread->todo,
-					     struct binder_work, entry);
-		if (!(tr->flags & TF_ONE_WAY) && w &&
-		    w->type == BINDER_WORK_TRANSACTION) {
-			/*
-			 * Do not allow new outgoing transaction from a
-			 * thread that has a transaction at the head of
-			 * its todo list. Only need to check the head
-			 * because binder_select_thread_ilocked picks a
-			 * thread from proc->waiting_threads to enqueue
-			 * the transaction, and nothing is queued to the
-			 * todo list while the thread is on waiting_threads.
-			 */
-			binder_user_error("%d:%d new transaction not allowed when there is a transaction on thread todo\n",
-					  proc->pid, thread->pid);
-			binder_inner_proc_unlock(proc);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EPROTO;
-			return_error_line = __LINE__;
-			goto err_bad_todo_list;
-		}
-
-		if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) {
-			struct binder_transaction *tmp;
-
-			tmp = thread->transaction_stack;
-			if (tmp->to_thread != thread) {
-				spin_lock(&tmp->lock);
-				binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n",
-					proc->pid, thread->pid, tmp->debug_id,
-					tmp->to_proc ? tmp->to_proc->pid : 0,
-					tmp->to_thread ?
-					tmp->to_thread->pid : 0);
-				spin_unlock(&tmp->lock);
-				binder_inner_proc_unlock(proc);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EPROTO;
-				return_error_line = __LINE__;
-				goto err_bad_call_stack;
-			}
-			while (tmp) {
-				struct binder_thread *from;
-
-				spin_lock(&tmp->lock);
-				from = tmp->from;
-				if (from && from->proc == target_proc) {
-					atomic_inc(&from->tmp_ref);
-					target_thread = from;
-					spin_unlock(&tmp->lock);
-					break;
-				}
-				spin_unlock(&tmp->lock);
-				tmp = tmp->from_parent;
-			}
-		}
-		binder_inner_proc_unlock(proc);
-	}
-	if (target_thread)
-		e->to_thread = target_thread->pid;
-	e->to_proc = target_proc->pid;
-
-	/* TODO: reuse incoming transaction for reply */
-	t = kzalloc(sizeof(*t), GFP_KERNEL);
-	if (t == NULL) {
-		binder_txn_error("%d:%d cannot allocate transaction\n",
-			thread->pid, proc->pid);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -ENOMEM;
-		return_error_line = __LINE__;
-		goto err_alloc_t_failed;
-	}
-	INIT_LIST_HEAD(&t->fd_fixups);
-	binder_stats_created(BINDER_STAT_TRANSACTION);
-	spin_lock_init(&t->lock);
-
-	tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL);
-	if (tcomplete == NULL) {
-		binder_txn_error("%d:%d cannot allocate work for transaction\n",
-			thread->pid, proc->pid);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -ENOMEM;
-		return_error_line = __LINE__;
-		goto err_alloc_tcomplete_failed;
-	}
-	binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE);
-
-	t->debug_id = t_debug_id;
-	t->start_time = t_start_time;
-
-	if (reply)
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n",
-			     proc->pid, thread->pid, t->debug_id,
-			     target_proc->pid, target_thread->pid,
-			     (u64)tr->data.ptr.buffer,
-			     (u64)tr->data.ptr.offsets,
-			     (u64)tr->data_size, (u64)tr->offsets_size,
-			     (u64)extra_buffers_size);
-	else
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n",
-			     proc->pid, thread->pid, t->debug_id,
-			     target_proc->pid, target_node->debug_id,
-			     (u64)tr->data.ptr.buffer,
-			     (u64)tr->data.ptr.offsets,
-			     (u64)tr->data_size, (u64)tr->offsets_size,
-			     (u64)extra_buffers_size);
-
-	if (!reply && !(tr->flags & TF_ONE_WAY))
-		t->from = thread;
-	else
-		t->from = NULL;
-	t->from_pid = proc->pid;
-	t->from_tid = thread->pid;
-	t->sender_euid = task_euid(proc->tsk);
-	t->to_proc = target_proc;
-	t->to_thread = target_thread;
-	t->code = tr->code;
-	t->flags = tr->flags;
-	t->priority = task_nice(current);
-
-	if (target_node && target_node->txn_security_ctx) {
-		u32 secid;
-		size_t added_size;
-
-		security_cred_getsecid(proc->cred, &secid);
-		ret = security_secid_to_secctx(secid, &secctx, &secctx_sz);
-		if (ret) {
-			binder_txn_error("%d:%d failed to get security context\n",
-				thread->pid, proc->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = ret;
-			return_error_line = __LINE__;
-			goto err_get_secctx_failed;
-		}
-		added_size = ALIGN(secctx_sz, sizeof(u64));
-		extra_buffers_size += added_size;
-		if (extra_buffers_size < added_size) {
-			binder_txn_error("%d:%d integer overflow of extra_buffers_size\n",
-				thread->pid, proc->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_bad_extra_size;
-		}
-	}
-
-	trace_binder_transaction(reply, t, target_node);
-
-	t->buffer = binder_alloc_new_buf(&target_proc->alloc, tr->data_size,
-		tr->offsets_size, extra_buffers_size,
-		!reply && (t->flags & TF_ONE_WAY), current->tgid);
-	if (IS_ERR(t->buffer)) {
-		char *s;
-
-		ret = PTR_ERR(t->buffer);
-		s = (ret == -ESRCH) ? ": vma cleared, target dead or dying"
-			: (ret == -ENOSPC) ? ": no space left"
-			: (ret == -ENOMEM) ? ": memory allocation failed"
-			: "";
-		binder_txn_error("cannot allocate buffer%s", s);
-
-		return_error_param = PTR_ERR(t->buffer);
-		return_error = return_error_param == -ESRCH ?
-			BR_DEAD_REPLY : BR_FAILED_REPLY;
-		return_error_line = __LINE__;
-		t->buffer = NULL;
-		goto err_binder_alloc_buf_failed;
-	}
-	if (secctx) {
-		int err;
-		size_t buf_offset = ALIGN(tr->data_size, sizeof(void *)) +
-				    ALIGN(tr->offsets_size, sizeof(void *)) +
-				    ALIGN(extra_buffers_size, sizeof(void *)) -
-				    ALIGN(secctx_sz, sizeof(u64));
-
-		t->security_ctx = (uintptr_t)t->buffer->user_data + buf_offset;
-		err = binder_alloc_copy_to_buffer(&target_proc->alloc,
-						  t->buffer, buf_offset,
-						  secctx, secctx_sz);
-		if (err) {
-			t->security_ctx = 0;
-			WARN_ON(1);
-		}
-		security_release_secctx(secctx, secctx_sz);
-		secctx = NULL;
-	}
-	t->buffer->debug_id = t->debug_id;
-	t->buffer->transaction = t;
-	t->buffer->target_node = target_node;
-	t->buffer->clear_on_free = !!(t->flags & TF_CLEAR_BUF);
-	trace_binder_transaction_alloc_buf(t->buffer);
-
-	if (binder_alloc_copy_user_to_buffer(
-				&target_proc->alloc,
-				t->buffer,
-				ALIGN(tr->data_size, sizeof(void *)),
-				(const void __user *)
-					(uintptr_t)tr->data.ptr.offsets,
-				tr->offsets_size)) {
-		binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
-				proc->pid, thread->pid);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -EFAULT;
-		return_error_line = __LINE__;
-		goto err_copy_data_failed;
-	}
-	if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) {
-		binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n",
-				proc->pid, thread->pid, (u64)tr->offsets_size);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -EINVAL;
-		return_error_line = __LINE__;
-		goto err_bad_offset;
-	}
-	if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) {
-		binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n",
-				  proc->pid, thread->pid,
-				  (u64)extra_buffers_size);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -EINVAL;
-		return_error_line = __LINE__;
-		goto err_bad_offset;
-	}
-	off_start_offset = ALIGN(tr->data_size, sizeof(void *));
-	buffer_offset = off_start_offset;
-	off_end_offset = off_start_offset + tr->offsets_size;
-	sg_buf_offset = ALIGN(off_end_offset, sizeof(void *));
-	sg_buf_end_offset = sg_buf_offset + extra_buffers_size -
-		ALIGN(secctx_sz, sizeof(u64));
-	off_min = 0;
-	for (buffer_offset = off_start_offset; buffer_offset < off_end_offset;
-	     buffer_offset += sizeof(binder_size_t)) {
-		struct binder_object_header *hdr;
-		size_t object_size;
-		struct binder_object object;
-		binder_size_t object_offset;
-		binder_size_t copy_size;
-
-		if (binder_alloc_copy_from_buffer(&target_proc->alloc,
-						  &object_offset,
-						  t->buffer,
-						  buffer_offset,
-						  sizeof(object_offset))) {
-			binder_txn_error("%d:%d copy offset from buffer failed\n",
-				thread->pid, proc->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_bad_offset;
-		}
-
-		/*
-		 * Copy the source user buffer up to the next object
-		 * that will be processed.
-		 */
-		copy_size = object_offset - user_offset;
-		if (copy_size && (user_offset > object_offset ||
-				binder_alloc_copy_user_to_buffer(
-					&target_proc->alloc,
-					t->buffer, user_offset,
-					user_buffer + user_offset,
-					copy_size))) {
-			binder_user_error("%d:%d got transaction with invalid data ptr\n",
-					proc->pid, thread->pid);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EFAULT;
-			return_error_line = __LINE__;
-			goto err_copy_data_failed;
-		}
-		object_size = binder_get_object(target_proc, user_buffer,
-				t->buffer, object_offset, &object);
-		if (object_size == 0 || object_offset < off_min) {
-			binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n",
-					  proc->pid, thread->pid,
-					  (u64)object_offset,
-					  (u64)off_min,
-					  (u64)t->buffer->data_size);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_bad_offset;
-		}
-		/*
-		 * Set offset to the next buffer fragment to be
-		 * copied
-		 */
-		user_offset = object_offset + object_size;
-
-		hdr = &object.hdr;
-		off_min = object_offset + object_size;
-		switch (hdr->type) {
-		case BINDER_TYPE_BINDER:
-		case BINDER_TYPE_WEAK_BINDER: {
-			struct flat_binder_object *fp;
-
-			fp = to_flat_binder_object(hdr);
-			ret = binder_translate_binder(fp, t, thread);
-
-			if (ret < 0 ||
-			    binder_alloc_copy_to_buffer(&target_proc->alloc,
-							t->buffer,
-							object_offset,
-							fp, sizeof(*fp))) {
-				binder_txn_error("%d:%d translate binder failed\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-		} break;
-		case BINDER_TYPE_HANDLE:
-		case BINDER_TYPE_WEAK_HANDLE: {
-			struct flat_binder_object *fp;
-
-			fp = to_flat_binder_object(hdr);
-			ret = binder_translate_handle(fp, t, thread);
-			if (ret < 0 ||
-			    binder_alloc_copy_to_buffer(&target_proc->alloc,
-							t->buffer,
-							object_offset,
-							fp, sizeof(*fp))) {
-				binder_txn_error("%d:%d translate handle failed\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-		} break;
-
-		case BINDER_TYPE_FD: {
-			struct binder_fd_object *fp = to_binder_fd_object(hdr);
-			binder_size_t fd_offset = object_offset +
-				(uintptr_t)&fp->fd - (uintptr_t)fp;
-			int ret = binder_translate_fd(fp->fd, fd_offset, t,
-						      thread, in_reply_to);
-
-			fp->pad_binder = 0;
-			if (ret < 0 ||
-			    binder_alloc_copy_to_buffer(&target_proc->alloc,
-							t->buffer,
-							object_offset,
-							fp, sizeof(*fp))) {
-				binder_txn_error("%d:%d translate fd failed\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-		} break;
-		case BINDER_TYPE_FDA: {
-			struct binder_object ptr_object;
-			binder_size_t parent_offset;
-			struct binder_object user_object;
-			size_t user_parent_size;
-			struct binder_fd_array_object *fda =
-				to_binder_fd_array_object(hdr);
-			size_t num_valid = (buffer_offset - off_start_offset) /
-						sizeof(binder_size_t);
-			struct binder_buffer_object *parent =
-				binder_validate_ptr(target_proc, t->buffer,
-						    &ptr_object, fda->parent,
-						    off_start_offset,
-						    &parent_offset,
-						    num_valid);
-			if (!parent) {
-				binder_user_error("%d:%d got transaction with invalid parent offset or type\n",
-						  proc->pid, thread->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EINVAL;
-				return_error_line = __LINE__;
-				goto err_bad_parent;
-			}
-			if (!binder_validate_fixup(target_proc, t->buffer,
-						   off_start_offset,
-						   parent_offset,
-						   fda->parent_offset,
-						   last_fixup_obj_off,
-						   last_fixup_min_off)) {
-				binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n",
-						  proc->pid, thread->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EINVAL;
-				return_error_line = __LINE__;
-				goto err_bad_parent;
-			}
-			/*
-			 * We need to read the user version of the parent
-			 * object to get the original user offset
-			 */
-			user_parent_size =
-				binder_get_object(proc, user_buffer, t->buffer,
-						  parent_offset, &user_object);
-			if (user_parent_size != sizeof(user_object.bbo)) {
-				binder_user_error("%d:%d invalid ptr object size: %zd vs %zd\n",
-						  proc->pid, thread->pid,
-						  user_parent_size,
-						  sizeof(user_object.bbo));
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EINVAL;
-				return_error_line = __LINE__;
-				goto err_bad_parent;
-			}
-			ret = binder_translate_fd_array(&pf_head, fda,
-							user_buffer, parent,
-							&user_object.bbo, t,
-							thread, in_reply_to);
-			if (!ret)
-				ret = binder_alloc_copy_to_buffer(&target_proc->alloc,
-								  t->buffer,
-								  object_offset,
-								  fda, sizeof(*fda));
-			if (ret) {
-				binder_txn_error("%d:%d translate fd array failed\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret > 0 ? -EINVAL : ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-			last_fixup_obj_off = parent_offset;
-			last_fixup_min_off =
-				fda->parent_offset + sizeof(u32) * fda->num_fds;
-		} break;
-		case BINDER_TYPE_PTR: {
-			struct binder_buffer_object *bp =
-				to_binder_buffer_object(hdr);
-			size_t buf_left = sg_buf_end_offset - sg_buf_offset;
-			size_t num_valid;
-
-			if (bp->length > buf_left) {
-				binder_user_error("%d:%d got transaction with too large buffer\n",
-						  proc->pid, thread->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = -EINVAL;
-				return_error_line = __LINE__;
-				goto err_bad_offset;
-			}
-			ret = binder_defer_copy(&sgc_head, sg_buf_offset,
-				(const void __user *)(uintptr_t)bp->buffer,
-				bp->length);
-			if (ret) {
-				binder_txn_error("%d:%d deferred copy failed\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-			/* Fixup buffer pointer to target proc address space */
-			bp->buffer = (uintptr_t)
-				t->buffer->user_data + sg_buf_offset;
-			sg_buf_offset += ALIGN(bp->length, sizeof(u64));
-
-			num_valid = (buffer_offset - off_start_offset) /
-					sizeof(binder_size_t);
-			ret = binder_fixup_parent(&pf_head, t,
-						  thread, bp,
-						  off_start_offset,
-						  num_valid,
-						  last_fixup_obj_off,
-						  last_fixup_min_off);
-			if (ret < 0 ||
-			    binder_alloc_copy_to_buffer(&target_proc->alloc,
-							t->buffer,
-							object_offset,
-							bp, sizeof(*bp))) {
-				binder_txn_error("%d:%d failed to fixup parent\n",
-					thread->pid, proc->pid);
-				return_error = BR_FAILED_REPLY;
-				return_error_param = ret;
-				return_error_line = __LINE__;
-				goto err_translate_failed;
-			}
-			last_fixup_obj_off = object_offset;
-			last_fixup_min_off = 0;
-		} break;
-		default:
-			binder_user_error("%d:%d got transaction with invalid object type, %x\n",
-				proc->pid, thread->pid, hdr->type);
-			return_error = BR_FAILED_REPLY;
-			return_error_param = -EINVAL;
-			return_error_line = __LINE__;
-			goto err_bad_object_type;
-		}
-	}
-	/* Done processing objects, copy the rest of the buffer */
-	if (binder_alloc_copy_user_to_buffer(
-				&target_proc->alloc,
-				t->buffer, user_offset,
-				user_buffer + user_offset,
-				tr->data_size - user_offset)) {
-		binder_user_error("%d:%d got transaction with invalid data ptr\n",
-				proc->pid, thread->pid);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = -EFAULT;
-		return_error_line = __LINE__;
-		goto err_copy_data_failed;
-	}
-
-	ret = binder_do_deferred_txn_copies(&target_proc->alloc, t->buffer,
-					    &sgc_head, &pf_head);
-	if (ret) {
-		binder_user_error("%d:%d got transaction with invalid offsets ptr\n",
-				  proc->pid, thread->pid);
-		return_error = BR_FAILED_REPLY;
-		return_error_param = ret;
-		return_error_line = __LINE__;
-		goto err_copy_data_failed;
-	}
-	if (t->buffer->oneway_spam_suspect)
-		tcomplete->type = BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT;
-	else
-		tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE;
-	t->work.type = BINDER_WORK_TRANSACTION;
-
-	if (reply) {
-		binder_enqueue_thread_work(thread, tcomplete);
-		binder_inner_proc_lock(target_proc);
-		if (target_thread->is_dead) {
-			return_error = BR_DEAD_REPLY;
-			binder_inner_proc_unlock(target_proc);
-			goto err_dead_proc_or_thread;
-		}
-		BUG_ON(t->buffer->async_transaction != 0);
-		binder_pop_transaction_ilocked(target_thread, in_reply_to);
-		binder_enqueue_thread_work_ilocked(target_thread, &t->work);
-		target_proc->outstanding_txns++;
-		binder_inner_proc_unlock(target_proc);
-		wake_up_interruptible_sync(&target_thread->wait);
-		binder_free_transaction(in_reply_to);
-	} else if (!(t->flags & TF_ONE_WAY)) {
-		BUG_ON(t->buffer->async_transaction != 0);
-		binder_inner_proc_lock(proc);
-		/*
-		 * Defer the TRANSACTION_COMPLETE, so we don't return to
-		 * userspace immediately; this allows the target process to
-		 * immediately start processing this transaction, reducing
-		 * latency. We will then return the TRANSACTION_COMPLETE when
-		 * the target replies (or there is an error).
-		 */
-		binder_enqueue_deferred_thread_work_ilocked(thread, tcomplete);
-		t->need_reply = 1;
-		t->from_parent = thread->transaction_stack;
-		thread->transaction_stack = t;
-		binder_inner_proc_unlock(proc);
-		return_error = binder_proc_transaction(t,
-				target_proc, target_thread);
-		if (return_error) {
-			binder_inner_proc_lock(proc);
-			binder_pop_transaction_ilocked(thread, t);
-			binder_inner_proc_unlock(proc);
-			goto err_dead_proc_or_thread;
-		}
-	} else {
-		BUG_ON(target_node == NULL);
-		BUG_ON(t->buffer->async_transaction != 1);
-		return_error = binder_proc_transaction(t, target_proc, NULL);
-		/*
-		 * Let the caller know when async transaction reaches a frozen
-		 * process and is put in a pending queue, waiting for the target
-		 * process to be unfrozen.
-		 */
-		if (return_error == BR_TRANSACTION_PENDING_FROZEN)
-			tcomplete->type = BINDER_WORK_TRANSACTION_PENDING;
-		binder_enqueue_thread_work(thread, tcomplete);
-		if (return_error &&
-		    return_error != BR_TRANSACTION_PENDING_FROZEN)
-			goto err_dead_proc_or_thread;
-	}
-	if (target_thread)
-		binder_thread_dec_tmpref(target_thread);
-	binder_proc_dec_tmpref(target_proc);
-	if (target_node)
-		binder_dec_node_tmpref(target_node);
-	/*
-	 * write barrier to synchronize with initialization
-	 * of log entry
-	 */
-	smp_wmb();
-	WRITE_ONCE(e->debug_id_done, t_debug_id);
-	return;
-
-err_dead_proc_or_thread:
-	binder_txn_error("%d:%d dead process or thread\n",
-		thread->pid, proc->pid);
-	return_error_line = __LINE__;
-	binder_dequeue_work(proc, tcomplete);
-err_translate_failed:
-err_bad_object_type:
-err_bad_offset:
-err_bad_parent:
-err_copy_data_failed:
-	binder_cleanup_deferred_txn_lists(&sgc_head, &pf_head);
-	binder_free_txn_fixups(t);
-	trace_binder_transaction_failed_buffer_release(t->buffer);
-	binder_transaction_buffer_release(target_proc, NULL, t->buffer,
-					  buffer_offset, true);
-	if (target_node)
-		binder_dec_node_tmpref(target_node);
-	target_node = NULL;
-	t->buffer->transaction = NULL;
-	binder_alloc_free_buf(&target_proc->alloc, t->buffer);
-err_binder_alloc_buf_failed:
-err_bad_extra_size:
-	if (secctx)
-		security_release_secctx(secctx, secctx_sz);
-err_get_secctx_failed:
-	kfree(tcomplete);
-	binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
-err_alloc_tcomplete_failed:
-	if (trace_binder_txn_latency_free_enabled())
-		binder_txn_latency_free(t);
-	kfree(t);
-	binder_stats_deleted(BINDER_STAT_TRANSACTION);
-err_alloc_t_failed:
-err_bad_todo_list:
-err_bad_call_stack:
-err_empty_call_stack:
-err_dead_binder:
-err_invalid_target_handle:
-	if (target_node) {
-		binder_dec_node(target_node, 1, 0);
-		binder_dec_node_tmpref(target_node);
-	}
-
-	binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
-		     "%d:%d transaction %s to %d:%d failed %d/%d/%d, size %lld-%lld line %d\n",
-		     proc->pid, thread->pid, reply ? "reply" :
-		     (tr->flags & TF_ONE_WAY ? "async" : "call"),
-		     target_proc ? target_proc->pid : 0,
-		     target_thread ? target_thread->pid : 0,
-		     t_debug_id, return_error, return_error_param,
-		     (u64)tr->data_size, (u64)tr->offsets_size,
-		     return_error_line);
-
-	if (target_thread)
-		binder_thread_dec_tmpref(target_thread);
-	if (target_proc)
-		binder_proc_dec_tmpref(target_proc);
-
-	{
-		struct binder_transaction_log_entry *fe;
-
-		e->return_error = return_error;
-		e->return_error_param = return_error_param;
-		e->return_error_line = return_error_line;
-		fe = binder_transaction_log_add(&binder_transaction_log_failed);
-		*fe = *e;
-		/*
-		 * write barrier to synchronize with initialization
-		 * of log entry
-		 */
-		smp_wmb();
-		WRITE_ONCE(e->debug_id_done, t_debug_id);
-		WRITE_ONCE(fe->debug_id_done, t_debug_id);
-	}
-
-	BUG_ON(thread->return_error.cmd != BR_OK);
-	if (in_reply_to) {
-		binder_set_txn_from_error(in_reply_to, t_debug_id,
-				return_error, return_error_param);
-		thread->return_error.cmd = BR_TRANSACTION_COMPLETE;
-		binder_enqueue_thread_work(thread, &thread->return_error.work);
-		binder_send_failed_reply(in_reply_to, return_error);
-	} else {
-		binder_inner_proc_lock(proc);
-		binder_set_extended_error(&thread->ee, t_debug_id,
-				return_error, return_error_param);
-		binder_inner_proc_unlock(proc);
-		thread->return_error.cmd = return_error;
-		binder_enqueue_thread_work(thread, &thread->return_error.work);
-	}
-}
-
-/**
- * binder_free_buf() - free the specified buffer
- * @proc:	binder proc that owns buffer
- * @buffer:	buffer to be freed
- * @is_failure:	failed to send transaction
- *
- * If buffer for an async transaction, enqueue the next async
- * transaction from the node.
- *
- * Cleanup buffer and free it.
- */
-static void
-binder_free_buf(struct binder_proc *proc,
-		struct binder_thread *thread,
-		struct binder_buffer *buffer, bool is_failure)
-{
-	binder_inner_proc_lock(proc);
-	if (buffer->transaction) {
-		buffer->transaction->buffer = NULL;
-		buffer->transaction = NULL;
-	}
-	binder_inner_proc_unlock(proc);
-	if (buffer->async_transaction && buffer->target_node) {
-		struct binder_node *buf_node;
-		struct binder_work *w;
-
-		buf_node = buffer->target_node;
-		binder_node_inner_lock(buf_node);
-		BUG_ON(!buf_node->has_async_transaction);
-		BUG_ON(buf_node->proc != proc);
-		w = binder_dequeue_work_head_ilocked(
-				&buf_node->async_todo);
-		if (!w) {
-			buf_node->has_async_transaction = false;
-		} else {
-			binder_enqueue_work_ilocked(
-					w, &proc->todo);
-			binder_wakeup_proc_ilocked(proc);
-		}
-		binder_node_inner_unlock(buf_node);
-	}
-	trace_binder_transaction_buffer_release(buffer);
-	binder_release_entire_buffer(proc, thread, buffer, is_failure);
-	binder_alloc_free_buf(&proc->alloc, buffer);
-}
-
-static int binder_thread_write(struct binder_proc *proc,
-			struct binder_thread *thread,
-			binder_uintptr_t binder_buffer, size_t size,
-			binder_size_t *consumed)
-{
-	uint32_t cmd;
-	struct binder_context *context = proc->context;
-	void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
-	void __user *ptr = buffer + *consumed;
-	void __user *end = buffer + size;
-
-	while (ptr < end && thread->return_error.cmd == BR_OK) {
-		int ret;
-
-		if (get_user(cmd, (uint32_t __user *)ptr))
-			return -EFAULT;
-		ptr += sizeof(uint32_t);
-		trace_binder_command(cmd);
-		if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.bc)) {
-			atomic_inc(&binder_stats.bc[_IOC_NR(cmd)]);
-			atomic_inc(&proc->stats.bc[_IOC_NR(cmd)]);
-			atomic_inc(&thread->stats.bc[_IOC_NR(cmd)]);
-		}
-		switch (cmd) {
-		case BC_INCREFS:
-		case BC_ACQUIRE:
-		case BC_RELEASE:
-		case BC_DECREFS: {
-			uint32_t target;
-			const char *debug_string;
-			bool strong = cmd == BC_ACQUIRE || cmd == BC_RELEASE;
-			bool increment = cmd == BC_INCREFS || cmd == BC_ACQUIRE;
-			struct binder_ref_data rdata;
-
-			if (get_user(target, (uint32_t __user *)ptr))
-				return -EFAULT;
-
-			ptr += sizeof(uint32_t);
-			ret = -1;
-			if (increment && !target) {
-				struct binder_node *ctx_mgr_node;
-
-				mutex_lock(&context->context_mgr_node_lock);
-				ctx_mgr_node = context->binder_context_mgr_node;
-				if (ctx_mgr_node) {
-					if (ctx_mgr_node->proc == proc) {
-						binder_user_error("%d:%d context manager tried to acquire desc 0\n",
-								  proc->pid, thread->pid);
-						mutex_unlock(&context->context_mgr_node_lock);
-						return -EINVAL;
-					}
-					ret = binder_inc_ref_for_node(
-							proc, ctx_mgr_node,
-							strong, NULL, &rdata);
-				}
-				mutex_unlock(&context->context_mgr_node_lock);
-			}
-			if (ret)
-				ret = binder_update_ref_for_handle(
-						proc, target, increment, strong,
-						&rdata);
-			if (!ret && rdata.desc != target) {
-				binder_user_error("%d:%d tried to acquire reference to desc %d, got %d instead\n",
-					proc->pid, thread->pid,
-					target, rdata.desc);
-			}
-			switch (cmd) {
-			case BC_INCREFS:
-				debug_string = "IncRefs";
-				break;
-			case BC_ACQUIRE:
-				debug_string = "Acquire";
-				break;
-			case BC_RELEASE:
-				debug_string = "Release";
-				break;
-			case BC_DECREFS:
-			default:
-				debug_string = "DecRefs";
-				break;
-			}
-			if (ret) {
-				binder_user_error("%d:%d %s %d refcount change on invalid ref %d ret %d\n",
-					proc->pid, thread->pid, debug_string,
-					strong, target, ret);
-				break;
-			}
-			binder_debug(BINDER_DEBUG_USER_REFS,
-				     "%d:%d %s ref %d desc %d s %d w %d\n",
-				     proc->pid, thread->pid, debug_string,
-				     rdata.debug_id, rdata.desc, rdata.strong,
-				     rdata.weak);
-			break;
-		}
-		case BC_INCREFS_DONE:
-		case BC_ACQUIRE_DONE: {
-			binder_uintptr_t node_ptr;
-			binder_uintptr_t cookie;
-			struct binder_node *node;
-			bool free_node;
-
-			if (get_user(node_ptr, (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(binder_uintptr_t);
-			if (get_user(cookie, (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(binder_uintptr_t);
-			node = binder_get_node(proc, node_ptr);
-			if (node == NULL) {
-				binder_user_error("%d:%d %s u%016llx no match\n",
-					proc->pid, thread->pid,
-					cmd == BC_INCREFS_DONE ?
-					"BC_INCREFS_DONE" :
-					"BC_ACQUIRE_DONE",
-					(u64)node_ptr);
-				break;
-			}
-			if (cookie != node->cookie) {
-				binder_user_error("%d:%d %s u%016llx node %d cookie mismatch %016llx != %016llx\n",
-					proc->pid, thread->pid,
-					cmd == BC_INCREFS_DONE ?
-					"BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
-					(u64)node_ptr, node->debug_id,
-					(u64)cookie, (u64)node->cookie);
-				binder_put_node(node);
-				break;
-			}
-			binder_node_inner_lock(node);
-			if (cmd == BC_ACQUIRE_DONE) {
-				if (node->pending_strong_ref == 0) {
-					binder_user_error("%d:%d BC_ACQUIRE_DONE node %d has no pending acquire request\n",
-						proc->pid, thread->pid,
-						node->debug_id);
-					binder_node_inner_unlock(node);
-					binder_put_node(node);
-					break;
-				}
-				node->pending_strong_ref = 0;
-			} else {
-				if (node->pending_weak_ref == 0) {
-					binder_user_error("%d:%d BC_INCREFS_DONE node %d has no pending increfs request\n",
-						proc->pid, thread->pid,
-						node->debug_id);
-					binder_node_inner_unlock(node);
-					binder_put_node(node);
-					break;
-				}
-				node->pending_weak_ref = 0;
-			}
-			free_node = binder_dec_node_nilocked(node,
-					cmd == BC_ACQUIRE_DONE, 0);
-			WARN_ON(free_node);
-			binder_debug(BINDER_DEBUG_USER_REFS,
-				     "%d:%d %s node %d ls %d lw %d tr %d\n",
-				     proc->pid, thread->pid,
-				     cmd == BC_INCREFS_DONE ? "BC_INCREFS_DONE" : "BC_ACQUIRE_DONE",
-				     node->debug_id, node->local_strong_refs,
-				     node->local_weak_refs, node->tmp_refs);
-			binder_node_inner_unlock(node);
-			binder_put_node(node);
-			break;
-		}
-		case BC_ATTEMPT_ACQUIRE:
-			pr_err("BC_ATTEMPT_ACQUIRE not supported\n");
-			return -EINVAL;
-		case BC_ACQUIRE_RESULT:
-			pr_err("BC_ACQUIRE_RESULT not supported\n");
-			return -EINVAL;
-
-		case BC_FREE_BUFFER: {
-			binder_uintptr_t data_ptr;
-			struct binder_buffer *buffer;
-
-			if (get_user(data_ptr, (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(binder_uintptr_t);
-
-			buffer = binder_alloc_prepare_to_free(&proc->alloc,
-							      data_ptr);
-			if (IS_ERR_OR_NULL(buffer)) {
-				if (PTR_ERR(buffer) == -EPERM) {
-					binder_user_error(
-						"%d:%d BC_FREE_BUFFER u%016llx matched unreturned or currently freeing buffer\n",
-						proc->pid, thread->pid,
-						(u64)data_ptr);
-				} else {
-					binder_user_error(
-						"%d:%d BC_FREE_BUFFER u%016llx no match\n",
-						proc->pid, thread->pid,
-						(u64)data_ptr);
-				}
-				break;
-			}
-			binder_debug(BINDER_DEBUG_FREE_BUFFER,
-				     "%d:%d BC_FREE_BUFFER u%016llx found buffer %d for %s transaction\n",
-				     proc->pid, thread->pid, (u64)data_ptr,
-				     buffer->debug_id,
-				     buffer->transaction ? "active" : "finished");
-			binder_free_buf(proc, thread, buffer, false);
-			break;
-		}
-
-		case BC_TRANSACTION_SG:
-		case BC_REPLY_SG: {
-			struct binder_transaction_data_sg tr;
-
-			if (copy_from_user(&tr, ptr, sizeof(tr)))
-				return -EFAULT;
-			ptr += sizeof(tr);
-			binder_transaction(proc, thread, &tr.transaction_data,
-					   cmd == BC_REPLY_SG, tr.buffers_size);
-			break;
-		}
-		case BC_TRANSACTION:
-		case BC_REPLY: {
-			struct binder_transaction_data tr;
-
-			if (copy_from_user(&tr, ptr, sizeof(tr)))
-				return -EFAULT;
-			ptr += sizeof(tr);
-			binder_transaction(proc, thread, &tr,
-					   cmd == BC_REPLY, 0);
-			break;
-		}
-
-		case BC_REGISTER_LOOPER:
-			binder_debug(BINDER_DEBUG_THREADS,
-				     "%d:%d BC_REGISTER_LOOPER\n",
-				     proc->pid, thread->pid);
-			binder_inner_proc_lock(proc);
-			if (thread->looper & BINDER_LOOPER_STATE_ENTERED) {
-				thread->looper |= BINDER_LOOPER_STATE_INVALID;
-				binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called after BC_ENTER_LOOPER\n",
-					proc->pid, thread->pid);
-			} else if (proc->requested_threads == 0) {
-				thread->looper |= BINDER_LOOPER_STATE_INVALID;
-				binder_user_error("%d:%d ERROR: BC_REGISTER_LOOPER called without request\n",
-					proc->pid, thread->pid);
-			} else {
-				proc->requested_threads--;
-				proc->requested_threads_started++;
-			}
-			thread->looper |= BINDER_LOOPER_STATE_REGISTERED;
-			binder_inner_proc_unlock(proc);
-			break;
-		case BC_ENTER_LOOPER:
-			binder_debug(BINDER_DEBUG_THREADS,
-				     "%d:%d BC_ENTER_LOOPER\n",
-				     proc->pid, thread->pid);
-			if (thread->looper & BINDER_LOOPER_STATE_REGISTERED) {
-				thread->looper |= BINDER_LOOPER_STATE_INVALID;
-				binder_user_error("%d:%d ERROR: BC_ENTER_LOOPER called after BC_REGISTER_LOOPER\n",
-					proc->pid, thread->pid);
-			}
-			thread->looper |= BINDER_LOOPER_STATE_ENTERED;
-			break;
-		case BC_EXIT_LOOPER:
-			binder_debug(BINDER_DEBUG_THREADS,
-				     "%d:%d BC_EXIT_LOOPER\n",
-				     proc->pid, thread->pid);
-			thread->looper |= BINDER_LOOPER_STATE_EXITED;
-			break;
-
-		case BC_REQUEST_DEATH_NOTIFICATION:
-		case BC_CLEAR_DEATH_NOTIFICATION: {
-			uint32_t target;
-			binder_uintptr_t cookie;
-			struct binder_ref *ref;
-			struct binder_ref_death *death = NULL;
-
-			if (get_user(target, (uint32_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(uint32_t);
-			if (get_user(cookie, (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(binder_uintptr_t);
-			if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
-				/*
-				 * Allocate memory for death notification
-				 * before taking lock
-				 */
-				death = kzalloc(sizeof(*death), GFP_KERNEL);
-				if (death == NULL) {
-					WARN_ON(thread->return_error.cmd !=
-						BR_OK);
-					thread->return_error.cmd = BR_ERROR;
-					binder_enqueue_thread_work(
-						thread,
-						&thread->return_error.work);
-					binder_debug(
-						BINDER_DEBUG_FAILED_TRANSACTION,
-						"%d:%d BC_REQUEST_DEATH_NOTIFICATION failed\n",
-						proc->pid, thread->pid);
-					break;
-				}
-			}
-			binder_proc_lock(proc);
-			ref = binder_get_ref_olocked(proc, target, false);
-			if (ref == NULL) {
-				binder_user_error("%d:%d %s invalid ref %d\n",
-					proc->pid, thread->pid,
-					cmd == BC_REQUEST_DEATH_NOTIFICATION ?
-					"BC_REQUEST_DEATH_NOTIFICATION" :
-					"BC_CLEAR_DEATH_NOTIFICATION",
-					target);
-				binder_proc_unlock(proc);
-				kfree(death);
-				break;
-			}
-
-			binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
-				     "%d:%d %s %016llx ref %d desc %d s %d w %d for node %d\n",
-				     proc->pid, thread->pid,
-				     cmd == BC_REQUEST_DEATH_NOTIFICATION ?
-				     "BC_REQUEST_DEATH_NOTIFICATION" :
-				     "BC_CLEAR_DEATH_NOTIFICATION",
-				     (u64)cookie, ref->data.debug_id,
-				     ref->data.desc, ref->data.strong,
-				     ref->data.weak, ref->node->debug_id);
-
-			binder_node_lock(ref->node);
-			if (cmd == BC_REQUEST_DEATH_NOTIFICATION) {
-				if (ref->death) {
-					binder_user_error("%d:%d BC_REQUEST_DEATH_NOTIFICATION death notification already set\n",
-						proc->pid, thread->pid);
-					binder_node_unlock(ref->node);
-					binder_proc_unlock(proc);
-					kfree(death);
-					break;
-				}
-				binder_stats_created(BINDER_STAT_DEATH);
-				INIT_LIST_HEAD(&death->work.entry);
-				death->cookie = cookie;
-				ref->death = death;
-				if (ref->node->proc == NULL) {
-					ref->death->work.type = BINDER_WORK_DEAD_BINDER;
-
-					binder_inner_proc_lock(proc);
-					binder_enqueue_work_ilocked(
-						&ref->death->work, &proc->todo);
-					binder_wakeup_proc_ilocked(proc);
-					binder_inner_proc_unlock(proc);
-				}
-			} else {
-				if (ref->death == NULL) {
-					binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification not active\n",
-						proc->pid, thread->pid);
-					binder_node_unlock(ref->node);
-					binder_proc_unlock(proc);
-					break;
-				}
-				death = ref->death;
-				if (death->cookie != cookie) {
-					binder_user_error("%d:%d BC_CLEAR_DEATH_NOTIFICATION death notification cookie mismatch %016llx != %016llx\n",
-						proc->pid, thread->pid,
-						(u64)death->cookie,
-						(u64)cookie);
-					binder_node_unlock(ref->node);
-					binder_proc_unlock(proc);
-					break;
-				}
-				ref->death = NULL;
-				binder_inner_proc_lock(proc);
-				if (list_empty(&death->work.entry)) {
-					death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
-					if (thread->looper &
-					    (BINDER_LOOPER_STATE_REGISTERED |
-					     BINDER_LOOPER_STATE_ENTERED))
-						binder_enqueue_thread_work_ilocked(
-								thread,
-								&death->work);
-					else {
-						binder_enqueue_work_ilocked(
-								&death->work,
-								&proc->todo);
-						binder_wakeup_proc_ilocked(
-								proc);
-					}
-				} else {
-					BUG_ON(death->work.type != BINDER_WORK_DEAD_BINDER);
-					death->work.type = BINDER_WORK_DEAD_BINDER_AND_CLEAR;
-				}
-				binder_inner_proc_unlock(proc);
-			}
-			binder_node_unlock(ref->node);
-			binder_proc_unlock(proc);
-		} break;
-		case BC_DEAD_BINDER_DONE: {
-			struct binder_work *w;
-			binder_uintptr_t cookie;
-			struct binder_ref_death *death = NULL;
-
-			if (get_user(cookie, (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-
-			ptr += sizeof(cookie);
-			binder_inner_proc_lock(proc);
-			list_for_each_entry(w, &proc->delivered_death,
-					    entry) {
-				struct binder_ref_death *tmp_death =
-					container_of(w,
-						     struct binder_ref_death,
-						     work);
-
-				if (tmp_death->cookie == cookie) {
-					death = tmp_death;
-					break;
-				}
-			}
-			binder_debug(BINDER_DEBUG_DEAD_BINDER,
-				     "%d:%d BC_DEAD_BINDER_DONE %016llx found %pK\n",
-				     proc->pid, thread->pid, (u64)cookie,
-				     death);
-			if (death == NULL) {
-				binder_user_error("%d:%d BC_DEAD_BINDER_DONE %016llx not found\n",
-					proc->pid, thread->pid, (u64)cookie);
-				binder_inner_proc_unlock(proc);
-				break;
-			}
-			binder_dequeue_work_ilocked(&death->work);
-			if (death->work.type == BINDER_WORK_DEAD_BINDER_AND_CLEAR) {
-				death->work.type = BINDER_WORK_CLEAR_DEATH_NOTIFICATION;
-				if (thread->looper &
-					(BINDER_LOOPER_STATE_REGISTERED |
-					 BINDER_LOOPER_STATE_ENTERED))
-					binder_enqueue_thread_work_ilocked(
-						thread, &death->work);
-				else {
-					binder_enqueue_work_ilocked(
-							&death->work,
-							&proc->todo);
-					binder_wakeup_proc_ilocked(proc);
-				}
-			}
-			binder_inner_proc_unlock(proc);
-		} break;
-
-		default:
-			pr_err("%d:%d unknown command %u\n",
-			       proc->pid, thread->pid, cmd);
-			return -EINVAL;
-		}
-		*consumed = ptr - buffer;
-	}
-	return 0;
-}
-
-static void binder_stat_br(struct binder_proc *proc,
-			   struct binder_thread *thread, uint32_t cmd)
-{
-	trace_binder_return(cmd);
-	if (_IOC_NR(cmd) < ARRAY_SIZE(binder_stats.br)) {
-		atomic_inc(&binder_stats.br[_IOC_NR(cmd)]);
-		atomic_inc(&proc->stats.br[_IOC_NR(cmd)]);
-		atomic_inc(&thread->stats.br[_IOC_NR(cmd)]);
-	}
-}
-
-static int binder_put_node_cmd(struct binder_proc *proc,
-			       struct binder_thread *thread,
-			       void __user **ptrp,
-			       binder_uintptr_t node_ptr,
-			       binder_uintptr_t node_cookie,
-			       int node_debug_id,
-			       uint32_t cmd, const char *cmd_name)
-{
-	void __user *ptr = *ptrp;
-
-	if (put_user(cmd, (uint32_t __user *)ptr))
-		return -EFAULT;
-	ptr += sizeof(uint32_t);
-
-	if (put_user(node_ptr, (binder_uintptr_t __user *)ptr))
-		return -EFAULT;
-	ptr += sizeof(binder_uintptr_t);
-
-	if (put_user(node_cookie, (binder_uintptr_t __user *)ptr))
-		return -EFAULT;
-	ptr += sizeof(binder_uintptr_t);
-
-	binder_stat_br(proc, thread, cmd);
-	binder_debug(BINDER_DEBUG_USER_REFS, "%d:%d %s %d u%016llx c%016llx\n",
-		     proc->pid, thread->pid, cmd_name, node_debug_id,
-		     (u64)node_ptr, (u64)node_cookie);
-
-	*ptrp = ptr;
-	return 0;
-}
-
-static int binder_wait_for_work(struct binder_thread *thread,
-				bool do_proc_work)
-{
-	DEFINE_WAIT(wait);
-	struct binder_proc *proc = thread->proc;
-	int ret = 0;
-
-	binder_inner_proc_lock(proc);
-	for (;;) {
-		prepare_to_wait(&thread->wait, &wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE);
-		if (binder_has_work_ilocked(thread, do_proc_work))
-			break;
-		if (do_proc_work)
-			list_add(&thread->waiting_thread_node,
-				 &proc->waiting_threads);
-		binder_inner_proc_unlock(proc);
-		schedule();
-		binder_inner_proc_lock(proc);
-		list_del_init(&thread->waiting_thread_node);
-		if (signal_pending(current)) {
-			ret = -EINTR;
-			break;
-		}
-	}
-	finish_wait(&thread->wait, &wait);
-	binder_inner_proc_unlock(proc);
-
-	return ret;
-}
-
-/**
- * binder_apply_fd_fixups() - finish fd translation
- * @proc:         binder_proc associated @t->buffer
- * @t:	binder transaction with list of fd fixups
- *
- * Now that we are in the context of the transaction target
- * process, we can allocate and install fds. Process the
- * list of fds to translate and fixup the buffer with the
- * new fds first and only then install the files.
- *
- * If we fail to allocate an fd, skip the install and release
- * any fds that have already been allocated.
- */
-static int binder_apply_fd_fixups(struct binder_proc *proc,
-				  struct binder_transaction *t)
-{
-	struct binder_txn_fd_fixup *fixup, *tmp;
-	int ret = 0;
-
-	list_for_each_entry(fixup, &t->fd_fixups, fixup_entry) {
-		int fd = get_unused_fd_flags(O_CLOEXEC);
-
-		if (fd < 0) {
-			binder_debug(BINDER_DEBUG_TRANSACTION,
-				     "failed fd fixup txn %d fd %d\n",
-				     t->debug_id, fd);
-			ret = -ENOMEM;
-			goto err;
-		}
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "fd fixup txn %d fd %d\n",
-			     t->debug_id, fd);
-		trace_binder_transaction_fd_recv(t, fd, fixup->offset);
-		fixup->target_fd = fd;
-		if (binder_alloc_copy_to_buffer(&proc->alloc, t->buffer,
-						fixup->offset, &fd,
-						sizeof(u32))) {
-			ret = -EINVAL;
-			goto err;
-		}
-	}
-	list_for_each_entry_safe(fixup, tmp, &t->fd_fixups, fixup_entry) {
-		fd_install(fixup->target_fd, fixup->file);
-		list_del(&fixup->fixup_entry);
-		kfree(fixup);
-	}
-
-	return ret;
-
-err:
-	binder_free_txn_fixups(t);
-	return ret;
-}
-
-static int binder_thread_read(struct binder_proc *proc,
-			      struct binder_thread *thread,
-			      binder_uintptr_t binder_buffer, size_t size,
-			      binder_size_t *consumed, int non_block)
-{
-	void __user *buffer = (void __user *)(uintptr_t)binder_buffer;
-	void __user *ptr = buffer + *consumed;
-	void __user *end = buffer + size;
-
-	int ret = 0;
-	int wait_for_proc_work;
-
-	if (*consumed == 0) {
-		if (put_user(BR_NOOP, (uint32_t __user *)ptr))
-			return -EFAULT;
-		ptr += sizeof(uint32_t);
-	}
-
-retry:
-	binder_inner_proc_lock(proc);
-	wait_for_proc_work = binder_available_for_proc_work_ilocked(thread);
-	binder_inner_proc_unlock(proc);
-
-	thread->looper |= BINDER_LOOPER_STATE_WAITING;
-
-	trace_binder_wait_for_work(wait_for_proc_work,
-				   !!thread->transaction_stack,
-				   !binder_worklist_empty(proc, &thread->todo));
-	if (wait_for_proc_work) {
-		if (!(thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
-					BINDER_LOOPER_STATE_ENTERED))) {
-			binder_user_error("%d:%d ERROR: Thread waiting for process work before calling BC_REGISTER_LOOPER or BC_ENTER_LOOPER (state %x)\n",
-				proc->pid, thread->pid, thread->looper);
-			wait_event_interruptible(binder_user_error_wait,
-						 binder_stop_on_user_error < 2);
-		}
-		binder_set_nice(proc->default_priority);
-	}
-
-	if (non_block) {
-		if (!binder_has_work(thread, wait_for_proc_work))
-			ret = -EAGAIN;
-	} else {
-		ret = binder_wait_for_work(thread, wait_for_proc_work);
-	}
-
-	thread->looper &= ~BINDER_LOOPER_STATE_WAITING;
-
-	if (ret)
-		return ret;
-
-	while (1) {
-		uint32_t cmd;
-		struct binder_transaction_data_secctx tr;
-		struct binder_transaction_data *trd = &tr.transaction_data;
-		struct binder_work *w = NULL;
-		struct list_head *list = NULL;
-		struct binder_transaction *t = NULL;
-		struct binder_thread *t_from;
-		size_t trsize = sizeof(*trd);
-
-		binder_inner_proc_lock(proc);
-		if (!binder_worklist_empty_ilocked(&thread->todo))
-			list = &thread->todo;
-		else if (!binder_worklist_empty_ilocked(&proc->todo) &&
-			   wait_for_proc_work)
-			list = &proc->todo;
-		else {
-			binder_inner_proc_unlock(proc);
-
-			/* no data added */
-			if (ptr - buffer == 4 && !thread->looper_need_return)
-				goto retry;
-			break;
-		}
-
-		if (end - ptr < sizeof(tr) + 4) {
-			binder_inner_proc_unlock(proc);
-			break;
-		}
-		w = binder_dequeue_work_head_ilocked(list);
-		if (binder_worklist_empty_ilocked(&thread->todo))
-			thread->process_todo = false;
-
-		switch (w->type) {
-		case BINDER_WORK_TRANSACTION: {
-			binder_inner_proc_unlock(proc);
-			t = container_of(w, struct binder_transaction, work);
-		} break;
-		case BINDER_WORK_RETURN_ERROR: {
-			struct binder_error *e = container_of(
-					w, struct binder_error, work);
-
-			WARN_ON(e->cmd == BR_OK);
-			binder_inner_proc_unlock(proc);
-			if (put_user(e->cmd, (uint32_t __user *)ptr))
-				return -EFAULT;
-			cmd = e->cmd;
-			e->cmd = BR_OK;
-			ptr += sizeof(uint32_t);
-
-			binder_stat_br(proc, thread, cmd);
-		} break;
-		case BINDER_WORK_TRANSACTION_COMPLETE:
-		case BINDER_WORK_TRANSACTION_PENDING:
-		case BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT: {
-			if (proc->oneway_spam_detection_enabled &&
-				   w->type == BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT)
-				cmd = BR_ONEWAY_SPAM_SUSPECT;
-			else if (w->type == BINDER_WORK_TRANSACTION_PENDING)
-				cmd = BR_TRANSACTION_PENDING_FROZEN;
-			else
-				cmd = BR_TRANSACTION_COMPLETE;
-			binder_inner_proc_unlock(proc);
-			kfree(w);
-			binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
-			if (put_user(cmd, (uint32_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(uint32_t);
-
-			binder_stat_br(proc, thread, cmd);
-			binder_debug(BINDER_DEBUG_TRANSACTION_COMPLETE,
-				     "%d:%d BR_TRANSACTION_COMPLETE\n",
-				     proc->pid, thread->pid);
-		} break;
-		case BINDER_WORK_NODE: {
-			struct binder_node *node = container_of(w, struct binder_node, work);
-			int strong, weak;
-			binder_uintptr_t node_ptr = node->ptr;
-			binder_uintptr_t node_cookie = node->cookie;
-			int node_debug_id = node->debug_id;
-			int has_weak_ref;
-			int has_strong_ref;
-			void __user *orig_ptr = ptr;
-
-			BUG_ON(proc != node->proc);
-			strong = node->internal_strong_refs ||
-					node->local_strong_refs;
-			weak = !hlist_empty(&node->refs) ||
-					node->local_weak_refs ||
-					node->tmp_refs || strong;
-			has_strong_ref = node->has_strong_ref;
-			has_weak_ref = node->has_weak_ref;
-
-			if (weak && !has_weak_ref) {
-				node->has_weak_ref = 1;
-				node->pending_weak_ref = 1;
-				node->local_weak_refs++;
-			}
-			if (strong && !has_strong_ref) {
-				node->has_strong_ref = 1;
-				node->pending_strong_ref = 1;
-				node->local_strong_refs++;
-			}
-			if (!strong && has_strong_ref)
-				node->has_strong_ref = 0;
-			if (!weak && has_weak_ref)
-				node->has_weak_ref = 0;
-			if (!weak && !strong) {
-				binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-					     "%d:%d node %d u%016llx c%016llx deleted\n",
-					     proc->pid, thread->pid,
-					     node_debug_id,
-					     (u64)node_ptr,
-					     (u64)node_cookie);
-				rb_erase(&node->rb_node, &proc->nodes);
-				binder_inner_proc_unlock(proc);
-				binder_node_lock(node);
-				/*
-				 * Acquire the node lock before freeing the
-				 * node to serialize with other threads that
-				 * may have been holding the node lock while
-				 * decrementing this node (avoids race where
-				 * this thread frees while the other thread
-				 * is unlocking the node after the final
-				 * decrement)
-				 */
-				binder_node_unlock(node);
-				binder_free_node(node);
-			} else
-				binder_inner_proc_unlock(proc);
-
-			if (weak && !has_weak_ref)
-				ret = binder_put_node_cmd(
-						proc, thread, &ptr, node_ptr,
-						node_cookie, node_debug_id,
-						BR_INCREFS, "BR_INCREFS");
-			if (!ret && strong && !has_strong_ref)
-				ret = binder_put_node_cmd(
-						proc, thread, &ptr, node_ptr,
-						node_cookie, node_debug_id,
-						BR_ACQUIRE, "BR_ACQUIRE");
-			if (!ret && !strong && has_strong_ref)
-				ret = binder_put_node_cmd(
-						proc, thread, &ptr, node_ptr,
-						node_cookie, node_debug_id,
-						BR_RELEASE, "BR_RELEASE");
-			if (!ret && !weak && has_weak_ref)
-				ret = binder_put_node_cmd(
-						proc, thread, &ptr, node_ptr,
-						node_cookie, node_debug_id,
-						BR_DECREFS, "BR_DECREFS");
-			if (orig_ptr == ptr)
-				binder_debug(BINDER_DEBUG_INTERNAL_REFS,
-					     "%d:%d node %d u%016llx c%016llx state unchanged\n",
-					     proc->pid, thread->pid,
-					     node_debug_id,
-					     (u64)node_ptr,
-					     (u64)node_cookie);
-			if (ret)
-				return ret;
-		} break;
-		case BINDER_WORK_DEAD_BINDER:
-		case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
-		case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
-			struct binder_ref_death *death;
-			uint32_t cmd;
-			binder_uintptr_t cookie;
-
-			death = container_of(w, struct binder_ref_death, work);
-			if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION)
-				cmd = BR_CLEAR_DEATH_NOTIFICATION_DONE;
-			else
-				cmd = BR_DEAD_BINDER;
-			cookie = death->cookie;
-
-			binder_debug(BINDER_DEBUG_DEATH_NOTIFICATION,
-				     "%d:%d %s %016llx\n",
-				      proc->pid, thread->pid,
-				      cmd == BR_DEAD_BINDER ?
-				      "BR_DEAD_BINDER" :
-				      "BR_CLEAR_DEATH_NOTIFICATION_DONE",
-				      (u64)cookie);
-			if (w->type == BINDER_WORK_CLEAR_DEATH_NOTIFICATION) {
-				binder_inner_proc_unlock(proc);
-				kfree(death);
-				binder_stats_deleted(BINDER_STAT_DEATH);
-			} else {
-				binder_enqueue_work_ilocked(
-						w, &proc->delivered_death);
-				binder_inner_proc_unlock(proc);
-			}
-			if (put_user(cmd, (uint32_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(uint32_t);
-			if (put_user(cookie,
-				     (binder_uintptr_t __user *)ptr))
-				return -EFAULT;
-			ptr += sizeof(binder_uintptr_t);
-			binder_stat_br(proc, thread, cmd);
-			if (cmd == BR_DEAD_BINDER)
-				goto done; /* DEAD_BINDER notifications can cause transactions */
-		} break;
-		default:
-			binder_inner_proc_unlock(proc);
-			pr_err("%d:%d: bad work type %d\n",
-			       proc->pid, thread->pid, w->type);
-			break;
-		}
-
-		if (!t)
-			continue;
-
-		BUG_ON(t->buffer == NULL);
-		if (t->buffer->target_node) {
-			struct binder_node *target_node = t->buffer->target_node;
-
-			trd->target.ptr = target_node->ptr;
-			trd->cookie =  target_node->cookie;
-			t->saved_priority = task_nice(current);
-			if (t->priority < target_node->min_priority &&
-			    !(t->flags & TF_ONE_WAY))
-				binder_set_nice(t->priority);
-			else if (!(t->flags & TF_ONE_WAY) ||
-				 t->saved_priority > target_node->min_priority)
-				binder_set_nice(target_node->min_priority);
-			cmd = BR_TRANSACTION;
-		} else {
-			trd->target.ptr = 0;
-			trd->cookie = 0;
-			cmd = BR_REPLY;
-		}
-		trd->code = t->code;
-		trd->flags = t->flags;
-		trd->sender_euid = from_kuid(current_user_ns(), t->sender_euid);
-
-		t_from = binder_get_txn_from(t);
-		if (t_from) {
-			struct task_struct *sender = t_from->proc->tsk;
-
-			trd->sender_pid =
-				task_tgid_nr_ns(sender,
-						task_active_pid_ns(current));
-		} else {
-			trd->sender_pid = 0;
-		}
-
-		ret = binder_apply_fd_fixups(proc, t);
-		if (ret) {
-			struct binder_buffer *buffer = t->buffer;
-			bool oneway = !!(t->flags & TF_ONE_WAY);
-			int tid = t->debug_id;
-
-			if (t_from)
-				binder_thread_dec_tmpref(t_from);
-			buffer->transaction = NULL;
-			binder_cleanup_transaction(t, "fd fixups failed",
-						   BR_FAILED_REPLY);
-			binder_free_buf(proc, thread, buffer, true);
-			binder_debug(BINDER_DEBUG_FAILED_TRANSACTION,
-				     "%d:%d %stransaction %d fd fixups failed %d/%d, line %d\n",
-				     proc->pid, thread->pid,
-				     oneway ? "async " :
-					(cmd == BR_REPLY ? "reply " : ""),
-				     tid, BR_FAILED_REPLY, ret, __LINE__);
-			if (cmd == BR_REPLY) {
-				cmd = BR_FAILED_REPLY;
-				if (put_user(cmd, (uint32_t __user *)ptr))
-					return -EFAULT;
-				ptr += sizeof(uint32_t);
-				binder_stat_br(proc, thread, cmd);
-				break;
-			}
-			continue;
-		}
-		trd->data_size = t->buffer->data_size;
-		trd->offsets_size = t->buffer->offsets_size;
-		trd->data.ptr.buffer = (uintptr_t)t->buffer->user_data;
-		trd->data.ptr.offsets = trd->data.ptr.buffer +
-					ALIGN(t->buffer->data_size,
-					    sizeof(void *));
-
-		tr.secctx = t->security_ctx;
-		if (t->security_ctx) {
-			cmd = BR_TRANSACTION_SEC_CTX;
-			trsize = sizeof(tr);
-		}
-		if (put_user(cmd, (uint32_t __user *)ptr)) {
-			if (t_from)
-				binder_thread_dec_tmpref(t_from);
-
-			binder_cleanup_transaction(t, "put_user failed",
-						   BR_FAILED_REPLY);
-
-			return -EFAULT;
-		}
-		ptr += sizeof(uint32_t);
-		if (copy_to_user(ptr, &tr, trsize)) {
-			if (t_from)
-				binder_thread_dec_tmpref(t_from);
-
-			binder_cleanup_transaction(t, "copy_to_user failed",
-						   BR_FAILED_REPLY);
-
-			return -EFAULT;
-		}
-		ptr += trsize;
-
-		trace_binder_transaction_received(t);
-		binder_stat_br(proc, thread, cmd);
-		binder_debug(BINDER_DEBUG_TRANSACTION,
-			     "%d:%d %s %d %d:%d, cmd %u size %zd-%zd ptr %016llx-%016llx\n",
-			     proc->pid, thread->pid,
-			     (cmd == BR_TRANSACTION) ? "BR_TRANSACTION" :
-				(cmd == BR_TRANSACTION_SEC_CTX) ?
-				     "BR_TRANSACTION_SEC_CTX" : "BR_REPLY",
-			     t->debug_id, t_from ? t_from->proc->pid : 0,
-			     t_from ? t_from->pid : 0, cmd,
-			     t->buffer->data_size, t->buffer->offsets_size,
-			     (u64)trd->data.ptr.buffer,
-			     (u64)trd->data.ptr.offsets);
-
-		if (t_from)
-			binder_thread_dec_tmpref(t_from);
-		t->buffer->allow_user_free = 1;
-		if (cmd != BR_REPLY && !(t->flags & TF_ONE_WAY)) {
-			binder_inner_proc_lock(thread->proc);
-			t->to_parent = thread->transaction_stack;
-			t->to_thread = thread;
-			thread->transaction_stack = t;
-			binder_inner_proc_unlock(thread->proc);
-		} else {
-			binder_free_transaction(t);
-		}
-		break;
-	}
-
-done:
-
-	*consumed = ptr - buffer;
-	binder_inner_proc_lock(proc);
-	if (proc->requested_threads == 0 &&
-	    list_empty(&thread->proc->waiting_threads) &&
-	    proc->requested_threads_started < proc->max_threads &&
-	    (thread->looper & (BINDER_LOOPER_STATE_REGISTERED |
-	     BINDER_LOOPER_STATE_ENTERED)) /* the user-space code fails to */
-	     /*spawn a new thread if we leave this out */) {
-		proc->requested_threads++;
-		binder_inner_proc_unlock(proc);
-		binder_debug(BINDER_DEBUG_THREADS,
-			     "%d:%d BR_SPAWN_LOOPER\n",
-			     proc->pid, thread->pid);
-		if (put_user(BR_SPAWN_LOOPER, (uint32_t __user *)buffer))
-			return -EFAULT;
-		binder_stat_br(proc, thread, BR_SPAWN_LOOPER);
-	} else
-		binder_inner_proc_unlock(proc);
-	return 0;
-}
-
-static void binder_release_work(struct binder_proc *proc,
-				struct list_head *list)
-{
-	struct binder_work *w;
-	enum binder_work_type wtype;
-
-	while (1) {
-		binder_inner_proc_lock(proc);
-		w = binder_dequeue_work_head_ilocked(list);
-		wtype = w ? w->type : 0;
-		binder_inner_proc_unlock(proc);
-		if (!w)
-			return;
-
-		switch (wtype) {
-		case BINDER_WORK_TRANSACTION: {
-			struct binder_transaction *t;
-
-			t = container_of(w, struct binder_transaction, work);
-
-			binder_cleanup_transaction(t, "process died.",
-						   BR_DEAD_REPLY);
-		} break;
-		case BINDER_WORK_RETURN_ERROR: {
-			struct binder_error *e = container_of(
-					w, struct binder_error, work);
-
-			binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
-				"undelivered TRANSACTION_ERROR: %u\n",
-				e->cmd);
-		} break;
-		case BINDER_WORK_TRANSACTION_PENDING:
-		case BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT:
-		case BINDER_WORK_TRANSACTION_COMPLETE: {
-			binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
-				"undelivered TRANSACTION_COMPLETE\n");
-			kfree(w);
-			binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE);
-		} break;
-		case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
-		case BINDER_WORK_CLEAR_DEATH_NOTIFICATION: {
-			struct binder_ref_death *death;
-
-			death = container_of(w, struct binder_ref_death, work);
-			binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
-				"undelivered death notification, %016llx\n",
-				(u64)death->cookie);
-			kfree(death);
-			binder_stats_deleted(BINDER_STAT_DEATH);
-		} break;
-		case BINDER_WORK_NODE:
-			break;
-		default:
-			pr_err("unexpected work type, %d, not freed\n",
-			       wtype);
-			break;
-		}
-	}
-
-}
-
-static struct binder_thread *binder_get_thread_ilocked(
-		struct binder_proc *proc, struct binder_thread *new_thread)
-{
-	struct binder_thread *thread = NULL;
-	struct rb_node *parent = NULL;
-	struct rb_node **p = &proc->threads.rb_node;
-
-	while (*p) {
-		parent = *p;
-		thread = rb_entry(parent, struct binder_thread, rb_node);
-
-		if (current->pid < thread->pid)
-			p = &(*p)->rb_left;
-		else if (current->pid > thread->pid)
-			p = &(*p)->rb_right;
-		else
-			return thread;
-	}
-	if (!new_thread)
-		return NULL;
-	thread = new_thread;
-	binder_stats_created(BINDER_STAT_THREAD);
-	thread->proc = proc;
-	thread->pid = current->pid;
-	atomic_set(&thread->tmp_ref, 0);
-	init_waitqueue_head(&thread->wait);
-	INIT_LIST_HEAD(&thread->todo);
-	rb_link_node(&thread->rb_node, parent, p);
-	rb_insert_color(&thread->rb_node, &proc->threads);
-	thread->looper_need_return = true;
-	thread->return_error.work.type = BINDER_WORK_RETURN_ERROR;
-	thread->return_error.cmd = BR_OK;
-	thread->reply_error.work.type = BINDER_WORK_RETURN_ERROR;
-	thread->reply_error.cmd = BR_OK;
-	thread->ee.command = BR_OK;
-	INIT_LIST_HEAD(&new_thread->waiting_thread_node);
-	return thread;
-}
-
-static struct binder_thread *binder_get_thread(struct binder_proc *proc)
-{
-	struct binder_thread *thread;
-	struct binder_thread *new_thread;
-
-	binder_inner_proc_lock(proc);
-	thread = binder_get_thread_ilocked(proc, NULL);
-	binder_inner_proc_unlock(proc);
-	if (!thread) {
-		new_thread = kzalloc(sizeof(*thread), GFP_KERNEL);
-		if (new_thread == NULL)
-			return NULL;
-		binder_inner_proc_lock(proc);
-		thread = binder_get_thread_ilocked(proc, new_thread);
-		binder_inner_proc_unlock(proc);
-		if (thread != new_thread)
-			kfree(new_thread);
-	}
-	return thread;
-}
-
-static void binder_free_proc(struct binder_proc *proc)
-{
-	struct binder_device *device;
-
-	BUG_ON(!list_empty(&proc->todo));
-	BUG_ON(!list_empty(&proc->delivered_death));
-	if (proc->outstanding_txns)
-		pr_warn("%s: Unexpected outstanding_txns %d\n",
-			__func__, proc->outstanding_txns);
-	device = container_of(proc->context, struct binder_device, context);
-	if (refcount_dec_and_test(&device->ref)) {
-		kfree(proc->context->name);
-		kfree(device);
-	}
-	binder_alloc_deferred_release(&proc->alloc);
-	put_task_struct(proc->tsk);
-	put_cred(proc->cred);
-	binder_stats_deleted(BINDER_STAT_PROC);
-	kfree(proc);
-}
-
-static void binder_free_thread(struct binder_thread *thread)
-{
-	BUG_ON(!list_empty(&thread->todo));
-	binder_stats_deleted(BINDER_STAT_THREAD);
-	binder_proc_dec_tmpref(thread->proc);
-	kfree(thread);
-}
-
-static int binder_thread_release(struct binder_proc *proc,
-				 struct binder_thread *thread)
-{
-	struct binder_transaction *t;
-	struct binder_transaction *send_reply = NULL;
-	int active_transactions = 0;
-	struct binder_transaction *last_t = NULL;
-
-	binder_inner_proc_lock(thread->proc);
-	/*
-	 * take a ref on the proc so it survives
-	 * after we remove this thread from proc->threads.
-	 * The corresponding dec is when we actually
-	 * free the thread in binder_free_thread()
-	 */
-	proc->tmp_ref++;
-	/*
-	 * take a ref on this thread to ensure it
-	 * survives while we are releasing it
-	 */
-	atomic_inc(&thread->tmp_ref);
-	rb_erase(&thread->rb_node, &proc->threads);
-	t = thread->transaction_stack;
-	if (t) {
-		spin_lock(&t->lock);
-		if (t->to_thread == thread)
-			send_reply = t;
-	} else {
-		__acquire(&t->lock);
-	}
-	thread->is_dead = true;
-
-	while (t) {
-		last_t = t;
-		active_transactions++;
-		binder_debug(BINDER_DEBUG_DEAD_TRANSACTION,
-			     "release %d:%d transaction %d %s, still active\n",
-			      proc->pid, thread->pid,
-			     t->debug_id,
-			     (t->to_thread == thread) ? "in" : "out");
-
-		if (t->to_thread == thread) {
-			thread->proc->outstanding_txns--;
-			t->to_proc = NULL;
-			t->to_thread = NULL;
-			if (t->buffer) {
-				t->buffer->transaction = NULL;
-				t->buffer = NULL;
-			}
-			t = t->to_parent;
-		} else if (t->from == thread) {
-			t->from = NULL;
-			t = t->from_parent;
-		} else
-			BUG();
-		spin_unlock(&last_t->lock);
-		if (t)
-			spin_lock(&t->lock);
-		else
-			__acquire(&t->lock);
-	}
-	/* annotation for sparse, lock not acquired in last iteration above */
-	__release(&t->lock);
-
-	/*
-	 * If this thread used poll, make sure we remove the waitqueue from any
-	 * poll data structures holding it.
-	 */
-	if (thread->looper & BINDER_LOOPER_STATE_POLL)
-		wake_up_pollfree(&thread->wait);
-
-	binder_inner_proc_unlock(thread->proc);
-
-	/*
-	 * This is needed to avoid races between wake_up_pollfree() above and
-	 * someone else removing the last entry from the queue for other reasons
-	 * (e.g. ep_remove_wait_queue() being called due to an epoll file
-	 * descriptor being closed).  Such other users hold an RCU read lock, so
-	 * we can be sure they're done after we call synchronize_rcu().
-	 */
-	if (thread->looper & BINDER_LOOPER_STATE_POLL)
-		synchronize_rcu();
-
-	if (send_reply)
-		binder_send_failed_reply(send_reply, BR_DEAD_REPLY);
-	binder_release_work(proc, &thread->todo);
-	binder_thread_dec_tmpref(thread);
-	return active_transactions;
-}
-
-static __poll_t binder_poll(struct file *filp,
-				struct poll_table_struct *wait)
-{
-	struct binder_proc *proc = filp->private_data;
-	struct binder_thread *thread = NULL;
-	bool wait_for_proc_work;
-
-	thread = binder_get_thread(proc);
-	if (!thread)
-		return POLLERR;
-
-	binder_inner_proc_lock(thread->proc);
-	thread->looper |= BINDER_LOOPER_STATE_POLL;
-	wait_for_proc_work = binder_available_for_proc_work_ilocked(thread);
-
-	binder_inner_proc_unlock(thread->proc);
-
-	poll_wait(filp, &thread->wait, wait);
-
-	if (binder_has_work(thread, wait_for_proc_work))
-		return EPOLLIN;
-
-	return 0;
-}
-
-static int binder_ioctl_write_read(struct file *filp, unsigned long arg,
-				struct binder_thread *thread)
-{
-	int ret = 0;
-	struct binder_proc *proc = filp->private_data;
-	void __user *ubuf = (void __user *)arg;
-	struct binder_write_read bwr;
-
-	if (copy_from_user(&bwr, ubuf, sizeof(bwr))) {
-		ret = -EFAULT;
-		goto out;
-	}
-	binder_debug(BINDER_DEBUG_READ_WRITE,
-		     "%d:%d write %lld at %016llx, read %lld at %016llx\n",
-		     proc->pid, thread->pid,
-		     (u64)bwr.write_size, (u64)bwr.write_buffer,
-		     (u64)bwr.read_size, (u64)bwr.read_buffer);
-
-	if (bwr.write_size > 0) {
-		ret = binder_thread_write(proc, thread,
-					  bwr.write_buffer,
-					  bwr.write_size,
-					  &bwr.write_consumed);
-		trace_binder_write_done(ret);
-		if (ret < 0) {
-			bwr.read_consumed = 0;
-			if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
-				ret = -EFAULT;
-			goto out;
-		}
-	}
-	if (bwr.read_size > 0) {
-		ret = binder_thread_read(proc, thread, bwr.read_buffer,
-					 bwr.read_size,
-					 &bwr.read_consumed,
-					 filp->f_flags & O_NONBLOCK);
-		trace_binder_read_done(ret);
-		binder_inner_proc_lock(proc);
-		if (!binder_worklist_empty_ilocked(&proc->todo))
-			binder_wakeup_proc_ilocked(proc);
-		binder_inner_proc_unlock(proc);
-		if (ret < 0) {
-			if (copy_to_user(ubuf, &bwr, sizeof(bwr)))
-				ret = -EFAULT;
-			goto out;
-		}
-	}
-	binder_debug(BINDER_DEBUG_READ_WRITE,
-		     "%d:%d wrote %lld of %lld, read return %lld of %lld\n",
-		     proc->pid, thread->pid,
-		     (u64)bwr.write_consumed, (u64)bwr.write_size,
-		     (u64)bwr.read_consumed, (u64)bwr.read_size);
-	if (copy_to_user(ubuf, &bwr, sizeof(bwr))) {
-		ret = -EFAULT;
-		goto out;
-	}
-out:
-	return ret;
-}
-
-static int binder_ioctl_set_ctx_mgr(struct file *filp,
-				    struct flat_binder_object *fbo)
-{
-	int ret = 0;
-	struct binder_proc *proc = filp->private_data;
-	struct binder_context *context = proc->context;
-	struct binder_node *new_node;
-	kuid_t curr_euid = current_euid();
-
-	mutex_lock(&context->context_mgr_node_lock);
-	if (context->binder_context_mgr_node) {
-		pr_err("BINDER_SET_CONTEXT_MGR already set\n");
-		ret = -EBUSY;
-		goto out;
-	}
-	ret = security_binder_set_context_mgr(proc->cred);
-	if (ret < 0)
-		goto out;
-	if (uid_valid(context->binder_context_mgr_uid)) {
-		if (!uid_eq(context->binder_context_mgr_uid, curr_euid)) {
-			pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
-			       from_kuid(&init_user_ns, curr_euid),
-			       from_kuid(&init_user_ns,
-					 context->binder_context_mgr_uid));
-			ret = -EPERM;
-			goto out;
-		}
-	} else {
-		context->binder_context_mgr_uid = curr_euid;
-	}
-	new_node = binder_new_node(proc, fbo);
-	if (!new_node) {
-		ret = -ENOMEM;
-		goto out;
-	}
-	binder_node_lock(new_node);
-	new_node->local_weak_refs++;
-	new_node->local_strong_refs++;
-	new_node->has_strong_ref = 1;
-	new_node->has_weak_ref = 1;
-	context->binder_context_mgr_node = new_node;
-	binder_node_unlock(new_node);
-	binder_put_node(new_node);
-out:
-	mutex_unlock(&context->context_mgr_node_lock);
-	return ret;
-}
-
-static int binder_ioctl_get_node_info_for_ref(struct binder_proc *proc,
-		struct binder_node_info_for_ref *info)
-{
-	struct binder_node *node;
-	struct binder_context *context = proc->context;
-	__u32 handle = info->handle;
-
-	if (info->strong_count || info->weak_count || info->reserved1 ||
-	    info->reserved2 || info->reserved3) {
-		binder_user_error("%d BINDER_GET_NODE_INFO_FOR_REF: only handle may be non-zero.",
-				  proc->pid);
-		return -EINVAL;
-	}
-
-	/* This ioctl may only be used by the context manager */
-	mutex_lock(&context->context_mgr_node_lock);
-	if (!context->binder_context_mgr_node ||
-		context->binder_context_mgr_node->proc != proc) {
-		mutex_unlock(&context->context_mgr_node_lock);
-		return -EPERM;
-	}
-	mutex_unlock(&context->context_mgr_node_lock);
-
-	node = binder_get_node_from_ref(proc, handle, true, NULL);
-	if (!node)
-		return -EINVAL;
-
-	info->strong_count = node->local_strong_refs +
-		node->internal_strong_refs;
-	info->weak_count = node->local_weak_refs;
-
-	binder_put_node(node);
-
-	return 0;
-}
-
-static int binder_ioctl_get_node_debug_info(struct binder_proc *proc,
-				struct binder_node_debug_info *info)
-{
-	struct rb_node *n;
-	binder_uintptr_t ptr = info->ptr;
-
-	memset(info, 0, sizeof(*info));
-
-	binder_inner_proc_lock(proc);
-	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
-		struct binder_node *node = rb_entry(n, struct binder_node,
-						    rb_node);
-		if (node->ptr > ptr) {
-			info->ptr = node->ptr;
-			info->cookie = node->cookie;
-			info->has_strong_ref = node->has_strong_ref;
-			info->has_weak_ref = node->has_weak_ref;
-			break;
-		}
-	}
-	binder_inner_proc_unlock(proc);
-
-	return 0;
-}
-
-static bool binder_txns_pending_ilocked(struct binder_proc *proc)
-{
-	struct rb_node *n;
-	struct binder_thread *thread;
-
-	if (proc->outstanding_txns > 0)
-		return true;
-
-	for (n = rb_first(&proc->threads); n; n = rb_next(n)) {
-		thread = rb_entry(n, struct binder_thread, rb_node);
-		if (thread->transaction_stack)
-			return true;
-	}
-	return false;
-}
-
-static int binder_ioctl_freeze(struct binder_freeze_info *info,
-			       struct binder_proc *target_proc)
-{
-	int ret = 0;
-
-	if (!info->enable) {
-		binder_inner_proc_lock(target_proc);
-		target_proc->sync_recv = false;
-		target_proc->async_recv = false;
-		target_proc->is_frozen = false;
-		binder_inner_proc_unlock(target_proc);
-		return 0;
-	}
-
-	/*
-	 * Freezing the target. Prevent new transactions by
-	 * setting frozen state. If timeout specified, wait
-	 * for transactions to drain.
-	 */
-	binder_inner_proc_lock(target_proc);
-	target_proc->sync_recv = false;
-	target_proc->async_recv = false;
-	target_proc->is_frozen = true;
-	binder_inner_proc_unlock(target_proc);
-
-	if (info->timeout_ms > 0)
-		ret = wait_event_interruptible_timeout(
-			target_proc->freeze_wait,
-			(!target_proc->outstanding_txns),
-			msecs_to_jiffies(info->timeout_ms));
-
-	/* Check pending transactions that wait for reply */
-	if (ret >= 0) {
-		binder_inner_proc_lock(target_proc);
-		if (binder_txns_pending_ilocked(target_proc))
-			ret = -EAGAIN;
-		binder_inner_proc_unlock(target_proc);
-	}
-
-	if (ret < 0) {
-		binder_inner_proc_lock(target_proc);
-		target_proc->is_frozen = false;
-		binder_inner_proc_unlock(target_proc);
-	}
-
-	return ret;
-}
-
-static int binder_ioctl_get_freezer_info(
-				struct binder_frozen_status_info *info)
-{
-	struct binder_proc *target_proc;
-	bool found = false;
-	__u32 txns_pending;
-
-	info->sync_recv = 0;
-	info->async_recv = 0;
-
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(target_proc, &binder_procs, proc_node) {
-		if (target_proc->pid == info->pid) {
-			found = true;
-			binder_inner_proc_lock(target_proc);
-			txns_pending = binder_txns_pending_ilocked(target_proc);
-			info->sync_recv |= target_proc->sync_recv |
-					(txns_pending << 1);
-			info->async_recv |= target_proc->async_recv;
-			binder_inner_proc_unlock(target_proc);
-		}
-	}
-	mutex_unlock(&binder_procs_lock);
-
-	if (!found)
-		return -EINVAL;
-
-	return 0;
-}
-
-static int binder_ioctl_get_extended_error(struct binder_thread *thread,
-					   void __user *ubuf)
-{
-	struct binder_extended_error ee;
-
-	binder_inner_proc_lock(thread->proc);
-	ee = thread->ee;
-	binder_set_extended_error(&thread->ee, 0, BR_OK, 0);
-	binder_inner_proc_unlock(thread->proc);
-
-	if (copy_to_user(ubuf, &ee, sizeof(ee)))
-		return -EFAULT;
-
-	return 0;
-}
-
-static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	int ret;
-	struct binder_proc *proc = filp->private_data;
-	struct binder_thread *thread;
-	void __user *ubuf = (void __user *)arg;
-
-	/*pr_info("binder_ioctl: %d:%d %x %lx\n",
-			proc->pid, current->pid, cmd, arg);*/
-
-	binder_selftest_alloc(&proc->alloc);
-
-	trace_binder_ioctl(cmd, arg);
-
-	ret = wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
-	if (ret)
-		goto err_unlocked;
-
-	thread = binder_get_thread(proc);
-	if (thread == NULL) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	switch (cmd) {
-	case BINDER_WRITE_READ:
-		ret = binder_ioctl_write_read(filp, arg, thread);
-		if (ret)
-			goto err;
-		break;
-	case BINDER_SET_MAX_THREADS: {
-		int max_threads;
-
-		if (copy_from_user(&max_threads, ubuf,
-				   sizeof(max_threads))) {
-			ret = -EINVAL;
-			goto err;
-		}
-		binder_inner_proc_lock(proc);
-		proc->max_threads = max_threads;
-		binder_inner_proc_unlock(proc);
-		break;
-	}
-	case BINDER_SET_CONTEXT_MGR_EXT: {
-		struct flat_binder_object fbo;
-
-		if (copy_from_user(&fbo, ubuf, sizeof(fbo))) {
-			ret = -EINVAL;
-			goto err;
-		}
-		ret = binder_ioctl_set_ctx_mgr(filp, &fbo);
-		if (ret)
-			goto err;
-		break;
-	}
-	case BINDER_SET_CONTEXT_MGR:
-		ret = binder_ioctl_set_ctx_mgr(filp, NULL);
-		if (ret)
-			goto err;
-		break;
-	case BINDER_THREAD_EXIT:
-		binder_debug(BINDER_DEBUG_THREADS, "%d:%d exit\n",
-			     proc->pid, thread->pid);
-		binder_thread_release(proc, thread);
-		thread = NULL;
-		break;
-	case BINDER_VERSION: {
-		struct binder_version __user *ver = ubuf;
-
-		if (put_user(BINDER_CURRENT_PROTOCOL_VERSION,
-			     &ver->protocol_version)) {
-			ret = -EINVAL;
-			goto err;
-		}
-		break;
-	}
-	case BINDER_GET_NODE_INFO_FOR_REF: {
-		struct binder_node_info_for_ref info;
-
-		if (copy_from_user(&info, ubuf, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-
-		ret = binder_ioctl_get_node_info_for_ref(proc, &info);
-		if (ret < 0)
-			goto err;
-
-		if (copy_to_user(ubuf, &info, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-
-		break;
-	}
-	case BINDER_GET_NODE_DEBUG_INFO: {
-		struct binder_node_debug_info info;
-
-		if (copy_from_user(&info, ubuf, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-
-		ret = binder_ioctl_get_node_debug_info(proc, &info);
-		if (ret < 0)
-			goto err;
-
-		if (copy_to_user(ubuf, &info, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-		break;
-	}
-	case BINDER_FREEZE: {
-		struct binder_freeze_info info;
-		struct binder_proc **target_procs = NULL, *target_proc;
-		int target_procs_count = 0, i = 0;
-
-		ret = 0;
-
-		if (copy_from_user(&info, ubuf, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-
-		mutex_lock(&binder_procs_lock);
-		hlist_for_each_entry(target_proc, &binder_procs, proc_node) {
-			if (target_proc->pid == info.pid)
-				target_procs_count++;
-		}
-
-		if (target_procs_count == 0) {
-			mutex_unlock(&binder_procs_lock);
-			ret = -EINVAL;
-			goto err;
-		}
-
-		target_procs = kcalloc(target_procs_count,
-				       sizeof(struct binder_proc *),
-				       GFP_KERNEL);
-
-		if (!target_procs) {
-			mutex_unlock(&binder_procs_lock);
-			ret = -ENOMEM;
-			goto err;
-		}
-
-		hlist_for_each_entry(target_proc, &binder_procs, proc_node) {
-			if (target_proc->pid != info.pid)
-				continue;
-
-			binder_inner_proc_lock(target_proc);
-			target_proc->tmp_ref++;
-			binder_inner_proc_unlock(target_proc);
-
-			target_procs[i++] = target_proc;
-		}
-		mutex_unlock(&binder_procs_lock);
-
-		for (i = 0; i < target_procs_count; i++) {
-			if (ret >= 0)
-				ret = binder_ioctl_freeze(&info,
-							  target_procs[i]);
-
-			binder_proc_dec_tmpref(target_procs[i]);
-		}
-
-		kfree(target_procs);
-
-		if (ret < 0)
-			goto err;
-		break;
-	}
-	case BINDER_GET_FROZEN_INFO: {
-		struct binder_frozen_status_info info;
-
-		if (copy_from_user(&info, ubuf, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-
-		ret = binder_ioctl_get_freezer_info(&info);
-		if (ret < 0)
-			goto err;
-
-		if (copy_to_user(ubuf, &info, sizeof(info))) {
-			ret = -EFAULT;
-			goto err;
-		}
-		break;
-	}
-	case BINDER_ENABLE_ONEWAY_SPAM_DETECTION: {
-		uint32_t enable;
-
-		if (copy_from_user(&enable, ubuf, sizeof(enable))) {
-			ret = -EFAULT;
-			goto err;
-		}
-		binder_inner_proc_lock(proc);
-		proc->oneway_spam_detection_enabled = (bool)enable;
-		binder_inner_proc_unlock(proc);
-		break;
-	}
-	case BINDER_GET_EXTENDED_ERROR:
-		ret = binder_ioctl_get_extended_error(thread, ubuf);
-		if (ret < 0)
-			goto err;
-		break;
-	default:
-		ret = -EINVAL;
-		goto err;
-	}
-	ret = 0;
-err:
-	if (thread)
-		thread->looper_need_return = false;
-	wait_event_interruptible(binder_user_error_wait, binder_stop_on_user_error < 2);
-	if (ret && ret != -EINTR)
-		pr_info("%d:%d ioctl %x %lx returned %d\n", proc->pid, current->pid, cmd, arg, ret);
-err_unlocked:
-	trace_binder_ioctl_done(ret);
-	return ret;
-}
-
-static void binder_vma_open(struct vm_area_struct *vma)
-{
-	struct binder_proc *proc = vma->vm_private_data;
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "%d open vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
-		     proc->pid, vma->vm_start, vma->vm_end,
-		     (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
-		     (unsigned long)pgprot_val(vma->vm_page_prot));
-}
-
-static void binder_vma_close(struct vm_area_struct *vma)
-{
-	struct binder_proc *proc = vma->vm_private_data;
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "%d close vm area %lx-%lx (%ld K) vma %lx pagep %lx\n",
-		     proc->pid, vma->vm_start, vma->vm_end,
-		     (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
-		     (unsigned long)pgprot_val(vma->vm_page_prot));
-	binder_alloc_vma_close(&proc->alloc);
-}
-
-static vm_fault_t binder_vm_fault(struct vm_fault *vmf)
-{
-	return VM_FAULT_SIGBUS;
-}
-
-static const struct vm_operations_struct binder_vm_ops = {
-	.open = binder_vma_open,
-	.close = binder_vma_close,
-	.fault = binder_vm_fault,
-};
-
-static int binder_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	struct binder_proc *proc = filp->private_data;
-
-	if (proc->tsk != current->group_leader)
-		return -EINVAL;
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "%s: %d %lx-%lx (%ld K) vma %lx pagep %lx\n",
-		     __func__, proc->pid, vma->vm_start, vma->vm_end,
-		     (vma->vm_end - vma->vm_start) / SZ_1K, vma->vm_flags,
-		     (unsigned long)pgprot_val(vma->vm_page_prot));
-
-	if (vma->vm_flags & FORBIDDEN_MMAP_FLAGS) {
-		pr_err("%s: %d %lx-%lx %s failed %d\n", __func__,
-		       proc->pid, vma->vm_start, vma->vm_end, "bad vm_flags", -EPERM);
-		return -EPERM;
-	}
-	vm_flags_mod(vma, VM_DONTCOPY | VM_MIXEDMAP, VM_MAYWRITE);
-
-	vma->vm_ops = &binder_vm_ops;
-	vma->vm_private_data = proc;
-
-	return binder_alloc_mmap_handler(&proc->alloc, vma);
-}
-
-static int binder_open(struct inode *nodp, struct file *filp)
-{
-	struct binder_proc *proc, *itr;
-	struct binder_device *binder_dev;
-	struct binderfs_info *info;
-	struct dentry *binder_binderfs_dir_entry_proc = NULL;
-	bool existing_pid = false;
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE, "%s: %d:%d\n", __func__,
-		     current->group_leader->pid, current->pid);
-
-	proc = kzalloc(sizeof(*proc), GFP_KERNEL);
-	if (proc == NULL)
-		return -ENOMEM;
-	spin_lock_init(&proc->inner_lock);
-	spin_lock_init(&proc->outer_lock);
-	get_task_struct(current->group_leader);
-	proc->tsk = current->group_leader;
-	proc->cred = get_cred(filp->f_cred);
-	INIT_LIST_HEAD(&proc->todo);
-	init_waitqueue_head(&proc->freeze_wait);
-	proc->default_priority = task_nice(current);
-	/* binderfs stashes devices in i_private */
-	if (is_binderfs_device(nodp)) {
-		binder_dev = nodp->i_private;
-		info = nodp->i_sb->s_fs_info;
-		binder_binderfs_dir_entry_proc = info->proc_log_dir;
-	} else {
-		binder_dev = container_of(filp->private_data,
-					  struct binder_device, miscdev);
-	}
-	refcount_inc(&binder_dev->ref);
-	proc->context = &binder_dev->context;
-	binder_alloc_init(&proc->alloc);
-
-	binder_stats_created(BINDER_STAT_PROC);
-	proc->pid = current->group_leader->pid;
-	INIT_LIST_HEAD(&proc->delivered_death);
-	INIT_LIST_HEAD(&proc->waiting_threads);
-	filp->private_data = proc;
-
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(itr, &binder_procs, proc_node) {
-		if (itr->pid == proc->pid) {
-			existing_pid = true;
-			break;
-		}
-	}
-	hlist_add_head(&proc->proc_node, &binder_procs);
-	mutex_unlock(&binder_procs_lock);
-
-	if (binder_debugfs_dir_entry_proc && !existing_pid) {
-		char strbuf[11];
-
-		snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
-		/*
-		 * proc debug entries are shared between contexts.
-		 * Only create for the first PID to avoid debugfs log spamming
-		 * The printing code will anyway print all contexts for a given
-		 * PID so this is not a problem.
-		 */
-		proc->debugfs_entry = debugfs_create_file(strbuf, 0444,
-			binder_debugfs_dir_entry_proc,
-			(void *)(unsigned long)proc->pid,
-			&proc_fops);
-	}
-
-	if (binder_binderfs_dir_entry_proc && !existing_pid) {
-		char strbuf[11];
-		struct dentry *binderfs_entry;
-
-		snprintf(strbuf, sizeof(strbuf), "%u", proc->pid);
-		/*
-		 * Similar to debugfs, the process specific log file is shared
-		 * between contexts. Only create for the first PID.
-		 * This is ok since same as debugfs, the log file will contain
-		 * information on all contexts of a given PID.
-		 */
-		binderfs_entry = binderfs_create_file(binder_binderfs_dir_entry_proc,
-			strbuf, &proc_fops, (void *)(unsigned long)proc->pid);
-		if (!IS_ERR(binderfs_entry)) {
-			proc->binderfs_entry = binderfs_entry;
-		} else {
-			int error;
-
-			error = PTR_ERR(binderfs_entry);
-			pr_warn("Unable to create file %s in binderfs (error %d)\n",
-				strbuf, error);
-		}
-	}
-
-	return 0;
-}
-
-static int binder_flush(struct file *filp, fl_owner_t id)
-{
-	struct binder_proc *proc = filp->private_data;
-
-	binder_defer_work(proc, BINDER_DEFERRED_FLUSH);
-
-	return 0;
-}
-
-static void binder_deferred_flush(struct binder_proc *proc)
-{
-	struct rb_node *n;
-	int wake_count = 0;
-
-	binder_inner_proc_lock(proc);
-	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n)) {
-		struct binder_thread *thread = rb_entry(n, struct binder_thread, rb_node);
-
-		thread->looper_need_return = true;
-		if (thread->looper & BINDER_LOOPER_STATE_WAITING) {
-			wake_up_interruptible(&thread->wait);
-			wake_count++;
-		}
-	}
-	binder_inner_proc_unlock(proc);
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "binder_flush: %d woke %d threads\n", proc->pid,
-		     wake_count);
-}
-
-static int binder_release(struct inode *nodp, struct file *filp)
-{
-	struct binder_proc *proc = filp->private_data;
-
-	debugfs_remove(proc->debugfs_entry);
-
-	if (proc->binderfs_entry) {
-		binderfs_remove_file(proc->binderfs_entry);
-		proc->binderfs_entry = NULL;
-	}
-
-	binder_defer_work(proc, BINDER_DEFERRED_RELEASE);
-
-	return 0;
-}
-
-static int binder_node_release(struct binder_node *node, int refs)
-{
-	struct binder_ref *ref;
-	int death = 0;
-	struct binder_proc *proc = node->proc;
-
-	binder_release_work(proc, &node->async_todo);
-
-	binder_node_lock(node);
-	binder_inner_proc_lock(proc);
-	binder_dequeue_work_ilocked(&node->work);
-	/*
-	 * The caller must have taken a temporary ref on the node,
-	 */
-	BUG_ON(!node->tmp_refs);
-	if (hlist_empty(&node->refs) && node->tmp_refs == 1) {
-		binder_inner_proc_unlock(proc);
-		binder_node_unlock(node);
-		binder_free_node(node);
-
-		return refs;
-	}
-
-	node->proc = NULL;
-	node->local_strong_refs = 0;
-	node->local_weak_refs = 0;
-	binder_inner_proc_unlock(proc);
-
-	spin_lock(&binder_dead_nodes_lock);
-	hlist_add_head(&node->dead_node, &binder_dead_nodes);
-	spin_unlock(&binder_dead_nodes_lock);
-
-	hlist_for_each_entry(ref, &node->refs, node_entry) {
-		refs++;
-		/*
-		 * Need the node lock to synchronize
-		 * with new notification requests and the
-		 * inner lock to synchronize with queued
-		 * death notifications.
-		 */
-		binder_inner_proc_lock(ref->proc);
-		if (!ref->death) {
-			binder_inner_proc_unlock(ref->proc);
-			continue;
-		}
-
-		death++;
-
-		BUG_ON(!list_empty(&ref->death->work.entry));
-		ref->death->work.type = BINDER_WORK_DEAD_BINDER;
-		binder_enqueue_work_ilocked(&ref->death->work,
-					    &ref->proc->todo);
-		binder_wakeup_proc_ilocked(ref->proc);
-		binder_inner_proc_unlock(ref->proc);
-	}
-
-	binder_debug(BINDER_DEBUG_DEAD_BINDER,
-		     "node %d now dead, refs %d, death %d\n",
-		     node->debug_id, refs, death);
-	binder_node_unlock(node);
-	binder_put_node(node);
-
-	return refs;
-}
-
-static void binder_deferred_release(struct binder_proc *proc)
-{
-	struct binder_context *context = proc->context;
-	struct rb_node *n;
-	int threads, nodes, incoming_refs, outgoing_refs, active_transactions;
-
-	mutex_lock(&binder_procs_lock);
-	hlist_del(&proc->proc_node);
-	mutex_unlock(&binder_procs_lock);
-
-	mutex_lock(&context->context_mgr_node_lock);
-	if (context->binder_context_mgr_node &&
-	    context->binder_context_mgr_node->proc == proc) {
-		binder_debug(BINDER_DEBUG_DEAD_BINDER,
-			     "%s: %d context_mgr_node gone\n",
-			     __func__, proc->pid);
-		context->binder_context_mgr_node = NULL;
-	}
-	mutex_unlock(&context->context_mgr_node_lock);
-	binder_inner_proc_lock(proc);
-	/*
-	 * Make sure proc stays alive after we
-	 * remove all the threads
-	 */
-	proc->tmp_ref++;
-
-	proc->is_dead = true;
-	proc->is_frozen = false;
-	proc->sync_recv = false;
-	proc->async_recv = false;
-	threads = 0;
-	active_transactions = 0;
-	while ((n = rb_first(&proc->threads))) {
-		struct binder_thread *thread;
-
-		thread = rb_entry(n, struct binder_thread, rb_node);
-		binder_inner_proc_unlock(proc);
-		threads++;
-		active_transactions += binder_thread_release(proc, thread);
-		binder_inner_proc_lock(proc);
-	}
-
-	nodes = 0;
-	incoming_refs = 0;
-	while ((n = rb_first(&proc->nodes))) {
-		struct binder_node *node;
-
-		node = rb_entry(n, struct binder_node, rb_node);
-		nodes++;
-		/*
-		 * take a temporary ref on the node before
-		 * calling binder_node_release() which will either
-		 * kfree() the node or call binder_put_node()
-		 */
-		binder_inc_node_tmpref_ilocked(node);
-		rb_erase(&node->rb_node, &proc->nodes);
-		binder_inner_proc_unlock(proc);
-		incoming_refs = binder_node_release(node, incoming_refs);
-		binder_inner_proc_lock(proc);
-	}
-	binder_inner_proc_unlock(proc);
-
-	outgoing_refs = 0;
-	binder_proc_lock(proc);
-	while ((n = rb_first(&proc->refs_by_desc))) {
-		struct binder_ref *ref;
-
-		ref = rb_entry(n, struct binder_ref, rb_node_desc);
-		outgoing_refs++;
-		binder_cleanup_ref_olocked(ref);
-		binder_proc_unlock(proc);
-		binder_free_ref(ref);
-		binder_proc_lock(proc);
-	}
-	binder_proc_unlock(proc);
-
-	binder_release_work(proc, &proc->todo);
-	binder_release_work(proc, &proc->delivered_death);
-
-	binder_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "%s: %d threads %d, nodes %d (ref %d), refs %d, active transactions %d\n",
-		     __func__, proc->pid, threads, nodes, incoming_refs,
-		     outgoing_refs, active_transactions);
-
-	binder_proc_dec_tmpref(proc);
-}
-
-static void binder_deferred_func(struct work_struct *work)
-{
-	struct binder_proc *proc;
-
-	int defer;
-
-	do {
-		mutex_lock(&binder_deferred_lock);
-		if (!hlist_empty(&binder_deferred_list)) {
-			proc = hlist_entry(binder_deferred_list.first,
-					struct binder_proc, deferred_work_node);
-			hlist_del_init(&proc->deferred_work_node);
-			defer = proc->deferred_work;
-			proc->deferred_work = 0;
-		} else {
-			proc = NULL;
-			defer = 0;
-		}
-		mutex_unlock(&binder_deferred_lock);
-
-		if (defer & BINDER_DEFERRED_FLUSH)
-			binder_deferred_flush(proc);
-
-		if (defer & BINDER_DEFERRED_RELEASE)
-			binder_deferred_release(proc); /* frees proc */
-	} while (proc);
-}
-static DECLARE_WORK(binder_deferred_work, binder_deferred_func);
-
-static void
-binder_defer_work(struct binder_proc *proc, enum binder_deferred_state defer)
-{
-	mutex_lock(&binder_deferred_lock);
-	proc->deferred_work |= defer;
-	if (hlist_unhashed(&proc->deferred_work_node)) {
-		hlist_add_head(&proc->deferred_work_node,
-				&binder_deferred_list);
-		schedule_work(&binder_deferred_work);
-	}
-	mutex_unlock(&binder_deferred_lock);
-}
-
-static void print_binder_transaction_ilocked(struct seq_file *m,
-					     struct binder_proc *proc,
-					     const char *prefix,
-					     struct binder_transaction *t)
-{
-	struct binder_proc *to_proc;
-	struct binder_buffer *buffer = t->buffer;
-	ktime_t current_time = ktime_get();
-
-	spin_lock(&t->lock);
-	to_proc = t->to_proc;
-	seq_printf(m,
-		   "%s %d: %pK from %d:%d to %d:%d code %x flags %x pri %ld r%d elapsed %lldms",
-		   prefix, t->debug_id, t,
-		   t->from_pid,
-		   t->from_tid,
-		   to_proc ? to_proc->pid : 0,
-		   t->to_thread ? t->to_thread->pid : 0,
-		   t->code, t->flags, t->priority, t->need_reply,
-		   ktime_ms_delta(current_time, t->start_time));
-	spin_unlock(&t->lock);
-
-	if (proc != to_proc) {
-		/*
-		 * Can only safely deref buffer if we are holding the
-		 * correct proc inner lock for this node
-		 */
-		seq_puts(m, "\n");
-		return;
-	}
-
-	if (buffer == NULL) {
-		seq_puts(m, " buffer free\n");
-		return;
-	}
-	if (buffer->target_node)
-		seq_printf(m, " node %d", buffer->target_node->debug_id);
-	seq_printf(m, " size %zd:%zd data %pK\n",
-		   buffer->data_size, buffer->offsets_size,
-		   buffer->user_data);
-}
-
-static void print_binder_work_ilocked(struct seq_file *m,
-				     struct binder_proc *proc,
-				     const char *prefix,
-				     const char *transaction_prefix,
-				     struct binder_work *w)
-{
-	struct binder_node *node;
-	struct binder_transaction *t;
-
-	switch (w->type) {
-	case BINDER_WORK_TRANSACTION:
-		t = container_of(w, struct binder_transaction, work);
-		print_binder_transaction_ilocked(
-				m, proc, transaction_prefix, t);
-		break;
-	case BINDER_WORK_RETURN_ERROR: {
-		struct binder_error *e = container_of(
-				w, struct binder_error, work);
-
-		seq_printf(m, "%stransaction error: %u\n",
-			   prefix, e->cmd);
-	} break;
-	case BINDER_WORK_TRANSACTION_COMPLETE:
-		seq_printf(m, "%stransaction complete\n", prefix);
-		break;
-	case BINDER_WORK_NODE:
-		node = container_of(w, struct binder_node, work);
-		seq_printf(m, "%snode work %d: u%016llx c%016llx\n",
-			   prefix, node->debug_id,
-			   (u64)node->ptr, (u64)node->cookie);
-		break;
-	case BINDER_WORK_DEAD_BINDER:
-		seq_printf(m, "%shas dead binder\n", prefix);
-		break;
-	case BINDER_WORK_DEAD_BINDER_AND_CLEAR:
-		seq_printf(m, "%shas cleared dead binder\n", prefix);
-		break;
-	case BINDER_WORK_CLEAR_DEATH_NOTIFICATION:
-		seq_printf(m, "%shas cleared death notification\n", prefix);
-		break;
-	default:
-		seq_printf(m, "%sunknown work: type %d\n", prefix, w->type);
-		break;
-	}
-}
-
-static void print_binder_thread_ilocked(struct seq_file *m,
-					struct binder_thread *thread,
-					int print_always)
-{
-	struct binder_transaction *t;
-	struct binder_work *w;
-	size_t start_pos = m->count;
-	size_t header_pos;
-
-	seq_printf(m, "  thread %d: l %02x need_return %d tr %d\n",
-			thread->pid, thread->looper,
-			thread->looper_need_return,
-			atomic_read(&thread->tmp_ref));
-	header_pos = m->count;
-	t = thread->transaction_stack;
-	while (t) {
-		if (t->from == thread) {
-			print_binder_transaction_ilocked(m, thread->proc,
-					"    outgoing transaction", t);
-			t = t->from_parent;
-		} else if (t->to_thread == thread) {
-			print_binder_transaction_ilocked(m, thread->proc,
-						 "    incoming transaction", t);
-			t = t->to_parent;
-		} else {
-			print_binder_transaction_ilocked(m, thread->proc,
-					"    bad transaction", t);
-			t = NULL;
-		}
-	}
-	list_for_each_entry(w, &thread->todo, entry) {
-		print_binder_work_ilocked(m, thread->proc, "    ",
-					  "    pending transaction", w);
-	}
-	if (!print_always && m->count == header_pos)
-		m->count = start_pos;
-}
-
-static void print_binder_node_nilocked(struct seq_file *m,
-				       struct binder_node *node)
-{
-	struct binder_ref *ref;
-	struct binder_work *w;
-	int count;
-
-	count = 0;
-	hlist_for_each_entry(ref, &node->refs, node_entry)
-		count++;
-
-	seq_printf(m, "  node %d: u%016llx c%016llx hs %d hw %d ls %d lw %d is %d iw %d tr %d",
-		   node->debug_id, (u64)node->ptr, (u64)node->cookie,
-		   node->has_strong_ref, node->has_weak_ref,
-		   node->local_strong_refs, node->local_weak_refs,
-		   node->internal_strong_refs, count, node->tmp_refs);
-	if (count) {
-		seq_puts(m, " proc");
-		hlist_for_each_entry(ref, &node->refs, node_entry)
-			seq_printf(m, " %d", ref->proc->pid);
-	}
-	seq_puts(m, "\n");
-	if (node->proc) {
-		list_for_each_entry(w, &node->async_todo, entry)
-			print_binder_work_ilocked(m, node->proc, "    ",
-					  "    pending async transaction", w);
-	}
-}
-
-static void print_binder_ref_olocked(struct seq_file *m,
-				     struct binder_ref *ref)
-{
-	binder_node_lock(ref->node);
-	seq_printf(m, "  ref %d: desc %d %snode %d s %d w %d d %pK\n",
-		   ref->data.debug_id, ref->data.desc,
-		   ref->node->proc ? "" : "dead ",
-		   ref->node->debug_id, ref->data.strong,
-		   ref->data.weak, ref->death);
-	binder_node_unlock(ref->node);
-}
-
-static void print_binder_proc(struct seq_file *m,
-			      struct binder_proc *proc, int print_all)
-{
-	struct binder_work *w;
-	struct rb_node *n;
-	size_t start_pos = m->count;
-	size_t header_pos;
-	struct binder_node *last_node = NULL;
-
-	seq_printf(m, "proc %d\n", proc->pid);
-	seq_printf(m, "context %s\n", proc->context->name);
-	header_pos = m->count;
-
-	binder_inner_proc_lock(proc);
-	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
-		print_binder_thread_ilocked(m, rb_entry(n, struct binder_thread,
-						rb_node), print_all);
-
-	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
-		struct binder_node *node = rb_entry(n, struct binder_node,
-						    rb_node);
-		if (!print_all && !node->has_async_transaction)
-			continue;
-
-		/*
-		 * take a temporary reference on the node so it
-		 * survives and isn't removed from the tree
-		 * while we print it.
-		 */
-		binder_inc_node_tmpref_ilocked(node);
-		/* Need to drop inner lock to take node lock */
-		binder_inner_proc_unlock(proc);
-		if (last_node)
-			binder_put_node(last_node);
-		binder_node_inner_lock(node);
-		print_binder_node_nilocked(m, node);
-		binder_node_inner_unlock(node);
-		last_node = node;
-		binder_inner_proc_lock(proc);
-	}
-	binder_inner_proc_unlock(proc);
-	if (last_node)
-		binder_put_node(last_node);
-
-	if (print_all) {
-		binder_proc_lock(proc);
-		for (n = rb_first(&proc->refs_by_desc);
-		     n != NULL;
-		     n = rb_next(n))
-			print_binder_ref_olocked(m, rb_entry(n,
-							    struct binder_ref,
-							    rb_node_desc));
-		binder_proc_unlock(proc);
-	}
-	binder_alloc_print_allocated(m, &proc->alloc);
-	binder_inner_proc_lock(proc);
-	list_for_each_entry(w, &proc->todo, entry)
-		print_binder_work_ilocked(m, proc, "  ",
-					  "  pending transaction", w);
-	list_for_each_entry(w, &proc->delivered_death, entry) {
-		seq_puts(m, "  has delivered dead binder\n");
-		break;
-	}
-	binder_inner_proc_unlock(proc);
-	if (!print_all && m->count == header_pos)
-		m->count = start_pos;
-}
-
-static const char * const binder_return_strings[] = {
-	"BR_ERROR",
-	"BR_OK",
-	"BR_TRANSACTION",
-	"BR_REPLY",
-	"BR_ACQUIRE_RESULT",
-	"BR_DEAD_REPLY",
-	"BR_TRANSACTION_COMPLETE",
-	"BR_INCREFS",
-	"BR_ACQUIRE",
-	"BR_RELEASE",
-	"BR_DECREFS",
-	"BR_ATTEMPT_ACQUIRE",
-	"BR_NOOP",
-	"BR_SPAWN_LOOPER",
-	"BR_FINISHED",
-	"BR_DEAD_BINDER",
-	"BR_CLEAR_DEATH_NOTIFICATION_DONE",
-	"BR_FAILED_REPLY",
-	"BR_FROZEN_REPLY",
-	"BR_ONEWAY_SPAM_SUSPECT",
-	"BR_TRANSACTION_PENDING_FROZEN"
-};
-
-static const char * const binder_command_strings[] = {
-	"BC_TRANSACTION",
-	"BC_REPLY",
-	"BC_ACQUIRE_RESULT",
-	"BC_FREE_BUFFER",
-	"BC_INCREFS",
-	"BC_ACQUIRE",
-	"BC_RELEASE",
-	"BC_DECREFS",
-	"BC_INCREFS_DONE",
-	"BC_ACQUIRE_DONE",
-	"BC_ATTEMPT_ACQUIRE",
-	"BC_REGISTER_LOOPER",
-	"BC_ENTER_LOOPER",
-	"BC_EXIT_LOOPER",
-	"BC_REQUEST_DEATH_NOTIFICATION",
-	"BC_CLEAR_DEATH_NOTIFICATION",
-	"BC_DEAD_BINDER_DONE",
-	"BC_TRANSACTION_SG",
-	"BC_REPLY_SG",
-};
-
-static const char * const binder_objstat_strings[] = {
-	"proc",
-	"thread",
-	"node",
-	"ref",
-	"death",
-	"transaction",
-	"transaction_complete"
-};
-
-static void print_binder_stats(struct seq_file *m, const char *prefix,
-			       struct binder_stats *stats)
-{
-	int i;
-
-	BUILD_BUG_ON(ARRAY_SIZE(stats->bc) !=
-		     ARRAY_SIZE(binder_command_strings));
-	for (i = 0; i < ARRAY_SIZE(stats->bc); i++) {
-		int temp = atomic_read(&stats->bc[i]);
-
-		if (temp)
-			seq_printf(m, "%s%s: %d\n", prefix,
-				   binder_command_strings[i], temp);
-	}
-
-	BUILD_BUG_ON(ARRAY_SIZE(stats->br) !=
-		     ARRAY_SIZE(binder_return_strings));
-	for (i = 0; i < ARRAY_SIZE(stats->br); i++) {
-		int temp = atomic_read(&stats->br[i]);
-
-		if (temp)
-			seq_printf(m, "%s%s: %d\n", prefix,
-				   binder_return_strings[i], temp);
-	}
-
-	BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
-		     ARRAY_SIZE(binder_objstat_strings));
-	BUILD_BUG_ON(ARRAY_SIZE(stats->obj_created) !=
-		     ARRAY_SIZE(stats->obj_deleted));
-	for (i = 0; i < ARRAY_SIZE(stats->obj_created); i++) {
-		int created = atomic_read(&stats->obj_created[i]);
-		int deleted = atomic_read(&stats->obj_deleted[i]);
-
-		if (created || deleted)
-			seq_printf(m, "%s%s: active %d total %d\n",
-				prefix,
-				binder_objstat_strings[i],
-				created - deleted,
-				created);
-	}
-}
-
-static void print_binder_proc_stats(struct seq_file *m,
-				    struct binder_proc *proc)
-{
-	struct binder_work *w;
-	struct binder_thread *thread;
-	struct rb_node *n;
-	int count, strong, weak, ready_threads;
-	size_t free_async_space =
-		binder_alloc_get_free_async_space(&proc->alloc);
-
-	seq_printf(m, "proc %d\n", proc->pid);
-	seq_printf(m, "context %s\n", proc->context->name);
-	count = 0;
-	ready_threads = 0;
-	binder_inner_proc_lock(proc);
-	for (n = rb_first(&proc->threads); n != NULL; n = rb_next(n))
-		count++;
-
-	list_for_each_entry(thread, &proc->waiting_threads, waiting_thread_node)
-		ready_threads++;
-
-	seq_printf(m, "  threads: %d\n", count);
-	seq_printf(m, "  requested threads: %d+%d/%d\n"
-			"  ready threads %d\n"
-			"  free async space %zd\n", proc->requested_threads,
-			proc->requested_threads_started, proc->max_threads,
-			ready_threads,
-			free_async_space);
-	count = 0;
-	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n))
-		count++;
-	binder_inner_proc_unlock(proc);
-	seq_printf(m, "  nodes: %d\n", count);
-	count = 0;
-	strong = 0;
-	weak = 0;
-	binder_proc_lock(proc);
-	for (n = rb_first(&proc->refs_by_desc); n != NULL; n = rb_next(n)) {
-		struct binder_ref *ref = rb_entry(n, struct binder_ref,
-						  rb_node_desc);
-		count++;
-		strong += ref->data.strong;
-		weak += ref->data.weak;
-	}
-	binder_proc_unlock(proc);
-	seq_printf(m, "  refs: %d s %d w %d\n", count, strong, weak);
-
-	count = binder_alloc_get_allocated_count(&proc->alloc);
-	seq_printf(m, "  buffers: %d\n", count);
-
-	binder_alloc_print_pages(m, &proc->alloc);
-
-	count = 0;
-	binder_inner_proc_lock(proc);
-	list_for_each_entry(w, &proc->todo, entry) {
-		if (w->type == BINDER_WORK_TRANSACTION)
-			count++;
-	}
-	binder_inner_proc_unlock(proc);
-	seq_printf(m, "  pending transactions: %d\n", count);
-
-	print_binder_stats(m, "  ", &proc->stats);
-}
-
-static int state_show(struct seq_file *m, void *unused)
-{
-	struct binder_proc *proc;
-	struct binder_node *node;
-	struct binder_node *last_node = NULL;
-
-	seq_puts(m, "binder state:\n");
-
-	spin_lock(&binder_dead_nodes_lock);
-	if (!hlist_empty(&binder_dead_nodes))
-		seq_puts(m, "dead nodes:\n");
-	hlist_for_each_entry(node, &binder_dead_nodes, dead_node) {
-		/*
-		 * take a temporary reference on the node so it
-		 * survives and isn't removed from the list
-		 * while we print it.
-		 */
-		node->tmp_refs++;
-		spin_unlock(&binder_dead_nodes_lock);
-		if (last_node)
-			binder_put_node(last_node);
-		binder_node_lock(node);
-		print_binder_node_nilocked(m, node);
-		binder_node_unlock(node);
-		last_node = node;
-		spin_lock(&binder_dead_nodes_lock);
-	}
-	spin_unlock(&binder_dead_nodes_lock);
-	if (last_node)
-		binder_put_node(last_node);
-
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(proc, &binder_procs, proc_node)
-		print_binder_proc(m, proc, 1);
-	mutex_unlock(&binder_procs_lock);
-
-	return 0;
-}
-
-static int stats_show(struct seq_file *m, void *unused)
-{
-	struct binder_proc *proc;
-
-	seq_puts(m, "binder stats:\n");
-
-	print_binder_stats(m, "", &binder_stats);
-
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(proc, &binder_procs, proc_node)
-		print_binder_proc_stats(m, proc);
-	mutex_unlock(&binder_procs_lock);
-
-	return 0;
-}
-
-static int transactions_show(struct seq_file *m, void *unused)
-{
-	struct binder_proc *proc;
-
-	seq_puts(m, "binder transactions:\n");
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(proc, &binder_procs, proc_node)
-		print_binder_proc(m, proc, 0);
-	mutex_unlock(&binder_procs_lock);
-
-	return 0;
-}
-
-static int proc_show(struct seq_file *m, void *unused)
-{
-	struct binder_proc *itr;
-	int pid = (unsigned long)m->private;
-
-	mutex_lock(&binder_procs_lock);
-	hlist_for_each_entry(itr, &binder_procs, proc_node) {
-		if (itr->pid == pid) {
-			seq_puts(m, "binder proc state:\n");
-			print_binder_proc(m, itr, 1);
-		}
-	}
-	mutex_unlock(&binder_procs_lock);
-
-	return 0;
-}
-
-static void print_binder_transaction_log_entry(struct seq_file *m,
-					struct binder_transaction_log_entry *e)
-{
-	int debug_id = READ_ONCE(e->debug_id_done);
-	/*
-	 * read barrier to guarantee debug_id_done read before
-	 * we print the log values
-	 */
-	smp_rmb();
-	seq_printf(m,
-		   "%d: %s from %d:%d to %d:%d context %s node %d handle %d size %d:%d ret %d/%d l=%d",
-		   e->debug_id, (e->call_type == 2) ? "reply" :
-		   ((e->call_type == 1) ? "async" : "call "), e->from_proc,
-		   e->from_thread, e->to_proc, e->to_thread, e->context_name,
-		   e->to_node, e->target_handle, e->data_size, e->offsets_size,
-		   e->return_error, e->return_error_param,
-		   e->return_error_line);
-	/*
-	 * read-barrier to guarantee read of debug_id_done after
-	 * done printing the fields of the entry
-	 */
-	smp_rmb();
-	seq_printf(m, debug_id && debug_id == READ_ONCE(e->debug_id_done) ?
-			"\n" : " (incomplete)\n");
-}
-
-static int transaction_log_show(struct seq_file *m, void *unused)
-{
-	struct binder_transaction_log *log = m->private;
-	unsigned int log_cur = atomic_read(&log->cur);
-	unsigned int count;
-	unsigned int cur;
-	int i;
-
-	count = log_cur + 1;
-	cur = count < ARRAY_SIZE(log->entry) && !log->full ?
-		0 : count % ARRAY_SIZE(log->entry);
-	if (count > ARRAY_SIZE(log->entry) || log->full)
-		count = ARRAY_SIZE(log->entry);
-	for (i = 0; i < count; i++) {
-		unsigned int index = cur++ % ARRAY_SIZE(log->entry);
-
-		print_binder_transaction_log_entry(m, &log->entry[index]);
-	}
-	return 0;
-}
-
-const struct file_operations binder_fops = {
-	.owner = THIS_MODULE,
-	.poll = binder_poll,
-	.unlocked_ioctl = binder_ioctl,
-	.compat_ioctl = compat_ptr_ioctl,
-	.mmap = binder_mmap,
-	.open = binder_open,
-	.flush = binder_flush,
-	.release = binder_release,
-};
-
-DEFINE_SHOW_ATTRIBUTE(state);
-DEFINE_SHOW_ATTRIBUTE(stats);
-DEFINE_SHOW_ATTRIBUTE(transactions);
-DEFINE_SHOW_ATTRIBUTE(transaction_log);
-
-const struct binder_debugfs_entry binder_debugfs_entries[] = {
-	{
-		.name = "state",
-		.mode = 0444,
-		.fops = &state_fops,
-		.data = NULL,
-	},
-	{
-		.name = "stats",
-		.mode = 0444,
-		.fops = &stats_fops,
-		.data = NULL,
-	},
-	{
-		.name = "transactions",
-		.mode = 0444,
-		.fops = &transactions_fops,
-		.data = NULL,
-	},
-	{
-		.name = "transaction_log",
-		.mode = 0444,
-		.fops = &transaction_log_fops,
-		.data = &binder_transaction_log,
-	},
-	{
-		.name = "failed_transaction_log",
-		.mode = 0444,
-		.fops = &transaction_log_fops,
-		.data = &binder_transaction_log_failed,
-	},
-	{} /* terminator */
-};
-
-static int __init init_binder_device(const char *name)
-{
-	int ret;
-	struct binder_device *binder_device;
-
-	binder_device = kzalloc(sizeof(*binder_device), GFP_KERNEL);
-	if (!binder_device)
-		return -ENOMEM;
-
-	binder_device->miscdev.fops = &binder_fops;
-	binder_device->miscdev.minor = MISC_DYNAMIC_MINOR;
-	binder_device->miscdev.name = name;
-
-	refcount_set(&binder_device->ref, 1);
-	binder_device->context.binder_context_mgr_uid = INVALID_UID;
-	binder_device->context.name = name;
-	mutex_init(&binder_device->context.context_mgr_node_lock);
-
-	ret = misc_register(&binder_device->miscdev);
-	if (ret < 0) {
-		kfree(binder_device);
-		return ret;
-	}
-
-	hlist_add_head(&binder_device->hlist, &binder_devices);
-
-	return ret;
-}
-
-static int __init binder_init(void)
-{
-	int ret;
-	char *device_name, *device_tmp;
-	struct binder_device *device;
-	struct hlist_node *tmp;
-	char *device_names = NULL;
-	const struct binder_debugfs_entry *db_entry;
-
-	ret = binder_alloc_shrinker_init();
-	if (ret)
-		return ret;
-
-	atomic_set(&binder_transaction_log.cur, ~0U);
-	atomic_set(&binder_transaction_log_failed.cur, ~0U);
-
-	binder_debugfs_dir_entry_root = debugfs_create_dir("binder", NULL);
-
-	binder_for_each_debugfs_entry(db_entry)
-		debugfs_create_file(db_entry->name,
-					db_entry->mode,
-					binder_debugfs_dir_entry_root,
-					db_entry->data,
-					db_entry->fops);
-
-	binder_debugfs_dir_entry_proc = debugfs_create_dir("proc",
-						binder_debugfs_dir_entry_root);
-
-	if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) &&
-	    strcmp(binder_devices_param, "") != 0) {
-		/*
-		* Copy the module_parameter string, because we don't want to
-		* tokenize it in-place.
-		 */
-		device_names = kstrdup(binder_devices_param, GFP_KERNEL);
-		if (!device_names) {
-			ret = -ENOMEM;
-			goto err_alloc_device_names_failed;
-		}
-
-		device_tmp = device_names;
-		while ((device_name = strsep(&device_tmp, ","))) {
-			ret = init_binder_device(device_name);
-			if (ret)
-				goto err_init_binder_device_failed;
-		}
-	}
-
-	ret = init_binderfs();
-	if (ret)
-		goto err_init_binder_device_failed;
-
-	return ret;
-
-err_init_binder_device_failed:
-	hlist_for_each_entry_safe(device, tmp, &binder_devices, hlist) {
-		misc_deregister(&device->miscdev);
-		hlist_del(&device->hlist);
-		kfree(device);
-	}
-
-	kfree(device_names);
-
-err_alloc_device_names_failed:
-	debugfs_remove_recursive(binder_debugfs_dir_entry_root);
-	binder_alloc_shrinker_exit();
-
-	return ret;
-}
-
-device_initcall(binder_init);
-
-#define CREATE_TRACE_POINTS
-#include "binder_trace.h"
-
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
deleted file mode 100644
index e3db8297095a..000000000000
--- a/drivers/android/binder_alloc.c
+++ /dev/null
@@ -1,1284 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* binder_alloc.c
- *
- * Android IPC Subsystem
- *
- * Copyright (C) 2007-2017 Google, Inc.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/list.h>
-#include <linux/sched/mm.h>
-#include <linux/module.h>
-#include <linux/rtmutex.h>
-#include <linux/rbtree.h>
-#include <linux/seq_file.h>
-#include <linux/vmalloc.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/list_lru.h>
-#include <linux/ratelimit.h>
-#include <asm/cacheflush.h>
-#include <linux/uaccess.h>
-#include <linux/highmem.h>
-#include <linux/sizes.h>
-#include "binder_alloc.h"
-#include "binder_trace.h"
-
-struct list_lru binder_alloc_lru;
-
-static DEFINE_MUTEX(binder_alloc_mmap_lock);
-
-enum {
-	BINDER_DEBUG_USER_ERROR             = 1U << 0,
-	BINDER_DEBUG_OPEN_CLOSE             = 1U << 1,
-	BINDER_DEBUG_BUFFER_ALLOC           = 1U << 2,
-	BINDER_DEBUG_BUFFER_ALLOC_ASYNC     = 1U << 3,
-};
-static uint32_t binder_alloc_debug_mask = BINDER_DEBUG_USER_ERROR;
-
-module_param_named(debug_mask, binder_alloc_debug_mask,
-		   uint, 0644);
-
-#define binder_alloc_debug(mask, x...) \
-	do { \
-		if (binder_alloc_debug_mask & mask) \
-			pr_info_ratelimited(x); \
-	} while (0)
-
-static struct binder_buffer *binder_buffer_next(struct binder_buffer *buffer)
-{
-	return list_entry(buffer->entry.next, struct binder_buffer, entry);
-}
-
-static struct binder_buffer *binder_buffer_prev(struct binder_buffer *buffer)
-{
-	return list_entry(buffer->entry.prev, struct binder_buffer, entry);
-}
-
-static size_t binder_alloc_buffer_size(struct binder_alloc *alloc,
-				       struct binder_buffer *buffer)
-{
-	if (list_is_last(&buffer->entry, &alloc->buffers))
-		return alloc->buffer + alloc->buffer_size - buffer->user_data;
-	return binder_buffer_next(buffer)->user_data - buffer->user_data;
-}
-
-static void binder_insert_free_buffer(struct binder_alloc *alloc,
-				      struct binder_buffer *new_buffer)
-{
-	struct rb_node **p = &alloc->free_buffers.rb_node;
-	struct rb_node *parent = NULL;
-	struct binder_buffer *buffer;
-	size_t buffer_size;
-	size_t new_buffer_size;
-
-	BUG_ON(!new_buffer->free);
-
-	new_buffer_size = binder_alloc_buffer_size(alloc, new_buffer);
-
-	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-		     "%d: add free buffer, size %zd, at %pK\n",
-		      alloc->pid, new_buffer_size, new_buffer);
-
-	while (*p) {
-		parent = *p;
-		buffer = rb_entry(parent, struct binder_buffer, rb_node);
-		BUG_ON(!buffer->free);
-
-		buffer_size = binder_alloc_buffer_size(alloc, buffer);
-
-		if (new_buffer_size < buffer_size)
-			p = &parent->rb_left;
-		else
-			p = &parent->rb_right;
-	}
-	rb_link_node(&new_buffer->rb_node, parent, p);
-	rb_insert_color(&new_buffer->rb_node, &alloc->free_buffers);
-}
-
-static void binder_insert_allocated_buffer_locked(
-		struct binder_alloc *alloc, struct binder_buffer *new_buffer)
-{
-	struct rb_node **p = &alloc->allocated_buffers.rb_node;
-	struct rb_node *parent = NULL;
-	struct binder_buffer *buffer;
-
-	BUG_ON(new_buffer->free);
-
-	while (*p) {
-		parent = *p;
-		buffer = rb_entry(parent, struct binder_buffer, rb_node);
-		BUG_ON(buffer->free);
-
-		if (new_buffer->user_data < buffer->user_data)
-			p = &parent->rb_left;
-		else if (new_buffer->user_data > buffer->user_data)
-			p = &parent->rb_right;
-		else
-			BUG();
-	}
-	rb_link_node(&new_buffer->rb_node, parent, p);
-	rb_insert_color(&new_buffer->rb_node, &alloc->allocated_buffers);
-}
-
-static struct binder_buffer *binder_alloc_prepare_to_free_locked(
-		struct binder_alloc *alloc,
-		uintptr_t user_ptr)
-{
-	struct rb_node *n = alloc->allocated_buffers.rb_node;
-	struct binder_buffer *buffer;
-	void __user *uptr;
-
-	uptr = (void __user *)user_ptr;
-
-	while (n) {
-		buffer = rb_entry(n, struct binder_buffer, rb_node);
-		BUG_ON(buffer->free);
-
-		if (uptr < buffer->user_data)
-			n = n->rb_left;
-		else if (uptr > buffer->user_data)
-			n = n->rb_right;
-		else {
-			/*
-			 * Guard against user threads attempting to
-			 * free the buffer when in use by kernel or
-			 * after it's already been freed.
-			 */
-			if (!buffer->allow_user_free)
-				return ERR_PTR(-EPERM);
-			buffer->allow_user_free = 0;
-			return buffer;
-		}
-	}
-	return NULL;
-}
-
-/**
- * binder_alloc_prepare_to_free() - get buffer given user ptr
- * @alloc:	binder_alloc for this proc
- * @user_ptr:	User pointer to buffer data
- *
- * Validate userspace pointer to buffer data and return buffer corresponding to
- * that user pointer. Search the rb tree for buffer that matches user data
- * pointer.
- *
- * Return:	Pointer to buffer or NULL
- */
-struct binder_buffer *binder_alloc_prepare_to_free(struct binder_alloc *alloc,
-						   uintptr_t user_ptr)
-{
-	struct binder_buffer *buffer;
-
-	mutex_lock(&alloc->mutex);
-	buffer = binder_alloc_prepare_to_free_locked(alloc, user_ptr);
-	mutex_unlock(&alloc->mutex);
-	return buffer;
-}
-
-static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
-				    void __user *start, void __user *end)
-{
-	void __user *page_addr;
-	unsigned long user_page_addr;
-	struct binder_lru_page *page;
-	struct vm_area_struct *vma = NULL;
-	struct mm_struct *mm = NULL;
-	bool need_mm = false;
-
-	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-		     "%d: %s pages %pK-%pK\n", alloc->pid,
-		     allocate ? "allocate" : "free", start, end);
-
-	if (end <= start)
-		return 0;
-
-	trace_binder_update_page_range(alloc, allocate, start, end);
-
-	if (allocate == 0)
-		goto free_range;
-
-	for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
-		page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
-		if (!page->page_ptr) {
-			need_mm = true;
-			break;
-		}
-	}
-
-	if (need_mm && mmget_not_zero(alloc->mm))
-		mm = alloc->mm;
-
-	if (mm) {
-		mmap_write_lock(mm);
-		vma = alloc->vma;
-	}
-
-	if (!vma && need_mm) {
-		binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-				   "%d: binder_alloc_buf failed to map pages in userspace, no vma\n",
-				   alloc->pid);
-		goto err_no_vma;
-	}
-
-	for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
-		int ret;
-		bool on_lru;
-		size_t index;
-
-		index = (page_addr - alloc->buffer) / PAGE_SIZE;
-		page = &alloc->pages[index];
-
-		if (page->page_ptr) {
-			trace_binder_alloc_lru_start(alloc, index);
-
-			on_lru = list_lru_del(&binder_alloc_lru, &page->lru);
-			WARN_ON(!on_lru);
-
-			trace_binder_alloc_lru_end(alloc, index);
-			continue;
-		}
-
-		if (WARN_ON(!vma))
-			goto err_page_ptr_cleared;
-
-		trace_binder_alloc_page_start(alloc, index);
-		page->page_ptr = alloc_page(GFP_KERNEL |
-					    __GFP_HIGHMEM |
-					    __GFP_ZERO);
-		if (!page->page_ptr) {
-			pr_err("%d: binder_alloc_buf failed for page at %pK\n",
-				alloc->pid, page_addr);
-			goto err_alloc_page_failed;
-		}
-		page->alloc = alloc;
-		INIT_LIST_HEAD(&page->lru);
-
-		user_page_addr = (uintptr_t)page_addr;
-		ret = vm_insert_page(vma, user_page_addr, page[0].page_ptr);
-		if (ret) {
-			pr_err("%d: binder_alloc_buf failed to map page at %lx in userspace\n",
-			       alloc->pid, user_page_addr);
-			goto err_vm_insert_page_failed;
-		}
-
-		if (index + 1 > alloc->pages_high)
-			alloc->pages_high = index + 1;
-
-		trace_binder_alloc_page_end(alloc, index);
-	}
-	if (mm) {
-		mmap_write_unlock(mm);
-		mmput(mm);
-	}
-	return 0;
-
-free_range:
-	for (page_addr = end - PAGE_SIZE; 1; page_addr -= PAGE_SIZE) {
-		bool ret;
-		size_t index;
-
-		index = (page_addr - alloc->buffer) / PAGE_SIZE;
-		page = &alloc->pages[index];
-
-		trace_binder_free_lru_start(alloc, index);
-
-		ret = list_lru_add(&binder_alloc_lru, &page->lru);
-		WARN_ON(!ret);
-
-		trace_binder_free_lru_end(alloc, index);
-		if (page_addr == start)
-			break;
-		continue;
-
-err_vm_insert_page_failed:
-		__free_page(page->page_ptr);
-		page->page_ptr = NULL;
-err_alloc_page_failed:
-err_page_ptr_cleared:
-		if (page_addr == start)
-			break;
-	}
-err_no_vma:
-	if (mm) {
-		mmap_write_unlock(mm);
-		mmput(mm);
-	}
-	return vma ? -ENOMEM : -ESRCH;
-}
-
-static inline void binder_alloc_set_vma(struct binder_alloc *alloc,
-		struct vm_area_struct *vma)
-{
-	/* pairs with smp_load_acquire in binder_alloc_get_vma() */
-	smp_store_release(&alloc->vma, vma);
-}
-
-static inline struct vm_area_struct *binder_alloc_get_vma(
-		struct binder_alloc *alloc)
-{
-	/* pairs with smp_store_release in binder_alloc_set_vma() */
-	return smp_load_acquire(&alloc->vma);
-}
-
-static bool debug_low_async_space_locked(struct binder_alloc *alloc, int pid)
-{
-	/*
-	 * Find the amount and size of buffers allocated by the current caller;
-	 * The idea is that once we cross the threshold, whoever is responsible
-	 * for the low async space is likely to try to send another async txn,
-	 * and at some point we'll catch them in the act. This is more efficient
-	 * than keeping a map per pid.
-	 */
-	struct rb_node *n;
-	struct binder_buffer *buffer;
-	size_t total_alloc_size = 0;
-	size_t num_buffers = 0;
-
-	for (n = rb_first(&alloc->allocated_buffers); n != NULL;
-		 n = rb_next(n)) {
-		buffer = rb_entry(n, struct binder_buffer, rb_node);
-		if (buffer->pid != pid)
-			continue;
-		if (!buffer->async_transaction)
-			continue;
-		total_alloc_size += binder_alloc_buffer_size(alloc, buffer)
-			+ sizeof(struct binder_buffer);
-		num_buffers++;
-	}
-
-	/*
-	 * Warn if this pid has more than 50 transactions, or more than 50% of
-	 * async space (which is 25% of total buffer size). Oneway spam is only
-	 * detected when the threshold is exceeded.
-	 */
-	if (num_buffers > 50 || total_alloc_size > alloc->buffer_size / 4) {
-		binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-			     "%d: pid %d spamming oneway? %zd buffers allocated for a total size of %zd\n",
-			      alloc->pid, pid, num_buffers, total_alloc_size);
-		if (!alloc->oneway_spam_detected) {
-			alloc->oneway_spam_detected = true;
-			return true;
-		}
-	}
-	return false;
-}
-
-static struct binder_buffer *binder_alloc_new_buf_locked(
-				struct binder_alloc *alloc,
-				size_t data_size,
-				size_t offsets_size,
-				size_t extra_buffers_size,
-				int is_async,
-				int pid)
-{
-	struct rb_node *n = alloc->free_buffers.rb_node;
-	struct binder_buffer *buffer;
-	size_t buffer_size;
-	struct rb_node *best_fit = NULL;
-	void __user *has_page_addr;
-	void __user *end_page_addr;
-	size_t size, data_offsets_size;
-	int ret;
-
-	/* Check binder_alloc is fully initialized */
-	if (!binder_alloc_get_vma(alloc)) {
-		binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-				   "%d: binder_alloc_buf, no vma\n",
-				   alloc->pid);
-		return ERR_PTR(-ESRCH);
-	}
-
-	data_offsets_size = ALIGN(data_size, sizeof(void *)) +
-		ALIGN(offsets_size, sizeof(void *));
-
-	if (data_offsets_size < data_size || data_offsets_size < offsets_size) {
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				"%d: got transaction with invalid size %zd-%zd\n",
-				alloc->pid, data_size, offsets_size);
-		return ERR_PTR(-EINVAL);
-	}
-	size = data_offsets_size + ALIGN(extra_buffers_size, sizeof(void *));
-	if (size < data_offsets_size || size < extra_buffers_size) {
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				"%d: got transaction with invalid extra_buffers_size %zd\n",
-				alloc->pid, extra_buffers_size);
-		return ERR_PTR(-EINVAL);
-	}
-	if (is_async &&
-	    alloc->free_async_space < size + sizeof(struct binder_buffer)) {
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-			     "%d: binder_alloc_buf size %zd failed, no async space left\n",
-			      alloc->pid, size);
-		return ERR_PTR(-ENOSPC);
-	}
-
-	/* Pad 0-size buffers so they get assigned unique addresses */
-	size = max(size, sizeof(void *));
-
-	while (n) {
-		buffer = rb_entry(n, struct binder_buffer, rb_node);
-		BUG_ON(!buffer->free);
-		buffer_size = binder_alloc_buffer_size(alloc, buffer);
-
-		if (size < buffer_size) {
-			best_fit = n;
-			n = n->rb_left;
-		} else if (size > buffer_size)
-			n = n->rb_right;
-		else {
-			best_fit = n;
-			break;
-		}
-	}
-	if (best_fit == NULL) {
-		size_t allocated_buffers = 0;
-		size_t largest_alloc_size = 0;
-		size_t total_alloc_size = 0;
-		size_t free_buffers = 0;
-		size_t largest_free_size = 0;
-		size_t total_free_size = 0;
-
-		for (n = rb_first(&alloc->allocated_buffers); n != NULL;
-		     n = rb_next(n)) {
-			buffer = rb_entry(n, struct binder_buffer, rb_node);
-			buffer_size = binder_alloc_buffer_size(alloc, buffer);
-			allocated_buffers++;
-			total_alloc_size += buffer_size;
-			if (buffer_size > largest_alloc_size)
-				largest_alloc_size = buffer_size;
-		}
-		for (n = rb_first(&alloc->free_buffers); n != NULL;
-		     n = rb_next(n)) {
-			buffer = rb_entry(n, struct binder_buffer, rb_node);
-			buffer_size = binder_alloc_buffer_size(alloc, buffer);
-			free_buffers++;
-			total_free_size += buffer_size;
-			if (buffer_size > largest_free_size)
-				largest_free_size = buffer_size;
-		}
-		binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-				   "%d: binder_alloc_buf size %zd failed, no address space\n",
-				   alloc->pid, size);
-		binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-				   "allocated: %zd (num: %zd largest: %zd), free: %zd (num: %zd largest: %zd)\n",
-				   total_alloc_size, allocated_buffers,
-				   largest_alloc_size, total_free_size,
-				   free_buffers, largest_free_size);
-		return ERR_PTR(-ENOSPC);
-	}
-	if (n == NULL) {
-		buffer = rb_entry(best_fit, struct binder_buffer, rb_node);
-		buffer_size = binder_alloc_buffer_size(alloc, buffer);
-	}
-
-	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-		     "%d: binder_alloc_buf size %zd got buffer %pK size %zd\n",
-		      alloc->pid, size, buffer, buffer_size);
-
-	has_page_addr = (void __user *)
-		(((uintptr_t)buffer->user_data + buffer_size) & PAGE_MASK);
-	WARN_ON(n && buffer_size != size);
-	end_page_addr =
-		(void __user *)PAGE_ALIGN((uintptr_t)buffer->user_data + size);
-	if (end_page_addr > has_page_addr)
-		end_page_addr = has_page_addr;
-	ret = binder_update_page_range(alloc, 1, (void __user *)
-		PAGE_ALIGN((uintptr_t)buffer->user_data), end_page_addr);
-	if (ret)
-		return ERR_PTR(ret);
-
-	if (buffer_size != size) {
-		struct binder_buffer *new_buffer;
-
-		new_buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
-		if (!new_buffer) {
-			pr_err("%s: %d failed to alloc new buffer struct\n",
-			       __func__, alloc->pid);
-			goto err_alloc_buf_struct_failed;
-		}
-		new_buffer->user_data = (u8 __user *)buffer->user_data + size;
-		list_add(&new_buffer->entry, &buffer->entry);
-		new_buffer->free = 1;
-		binder_insert_free_buffer(alloc, new_buffer);
-	}
-
-	rb_erase(best_fit, &alloc->free_buffers);
-	buffer->free = 0;
-	buffer->allow_user_free = 0;
-	binder_insert_allocated_buffer_locked(alloc, buffer);
-	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-		     "%d: binder_alloc_buf size %zd got %pK\n",
-		      alloc->pid, size, buffer);
-	buffer->data_size = data_size;
-	buffer->offsets_size = offsets_size;
-	buffer->async_transaction = is_async;
-	buffer->extra_buffers_size = extra_buffers_size;
-	buffer->pid = pid;
-	buffer->oneway_spam_suspect = false;
-	if (is_async) {
-		alloc->free_async_space -= size + sizeof(struct binder_buffer);
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
-			     "%d: binder_alloc_buf size %zd async free %zd\n",
-			      alloc->pid, size, alloc->free_async_space);
-		if (alloc->free_async_space < alloc->buffer_size / 10) {
-			/*
-			 * Start detecting spammers once we have less than 20%
-			 * of async space left (which is less than 10% of total
-			 * buffer size).
-			 */
-			buffer->oneway_spam_suspect = debug_low_async_space_locked(alloc, pid);
-		} else {
-			alloc->oneway_spam_detected = false;
-		}
-	}
-	return buffer;
-
-err_alloc_buf_struct_failed:
-	binder_update_page_range(alloc, 0, (void __user *)
-				 PAGE_ALIGN((uintptr_t)buffer->user_data),
-				 end_page_addr);
-	return ERR_PTR(-ENOMEM);
-}
-
-/**
- * binder_alloc_new_buf() - Allocate a new binder buffer
- * @alloc:              binder_alloc for this proc
- * @data_size:          size of user data buffer
- * @offsets_size:       user specified buffer offset
- * @extra_buffers_size: size of extra space for meta-data (eg, security context)
- * @is_async:           buffer for async transaction
- * @pid:				pid to attribute allocation to (used for debugging)
- *
- * Allocate a new buffer given the requested sizes. Returns
- * the kernel version of the buffer pointer. The size allocated
- * is the sum of the three given sizes (each rounded up to
- * pointer-sized boundary)
- *
- * Return:	The allocated buffer or %NULL if error
- */
-struct binder_buffer *binder_alloc_new_buf(struct binder_alloc *alloc,
-					   size_t data_size,
-					   size_t offsets_size,
-					   size_t extra_buffers_size,
-					   int is_async,
-					   int pid)
-{
-	struct binder_buffer *buffer;
-
-	mutex_lock(&alloc->mutex);
-	buffer = binder_alloc_new_buf_locked(alloc, data_size, offsets_size,
-					     extra_buffers_size, is_async, pid);
-	mutex_unlock(&alloc->mutex);
-	return buffer;
-}
-
-static void __user *buffer_start_page(struct binder_buffer *buffer)
-{
-	return (void __user *)((uintptr_t)buffer->user_data & PAGE_MASK);
-}
-
-static void __user *prev_buffer_end_page(struct binder_buffer *buffer)
-{
-	return (void __user *)
-		(((uintptr_t)(buffer->user_data) - 1) & PAGE_MASK);
-}
-
-static void binder_delete_free_buffer(struct binder_alloc *alloc,
-				      struct binder_buffer *buffer)
-{
-	struct binder_buffer *prev, *next = NULL;
-	bool to_free = true;
-
-	BUG_ON(alloc->buffers.next == &buffer->entry);
-	prev = binder_buffer_prev(buffer);
-	BUG_ON(!prev->free);
-	if (prev_buffer_end_page(prev) == buffer_start_page(buffer)) {
-		to_free = false;
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				   "%d: merge free, buffer %pK share page with %pK\n",
-				   alloc->pid, buffer->user_data,
-				   prev->user_data);
-	}
-
-	if (!list_is_last(&buffer->entry, &alloc->buffers)) {
-		next = binder_buffer_next(buffer);
-		if (buffer_start_page(next) == buffer_start_page(buffer)) {
-			to_free = false;
-			binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-					   "%d: merge free, buffer %pK share page with %pK\n",
-					   alloc->pid,
-					   buffer->user_data,
-					   next->user_data);
-		}
-	}
-
-	if (PAGE_ALIGNED(buffer->user_data)) {
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				   "%d: merge free, buffer start %pK is page aligned\n",
-				   alloc->pid, buffer->user_data);
-		to_free = false;
-	}
-
-	if (to_free) {
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				   "%d: merge free, buffer %pK do not share page with %pK or %pK\n",
-				   alloc->pid, buffer->user_data,
-				   prev->user_data,
-				   next ? next->user_data : NULL);
-		binder_update_page_range(alloc, 0, buffer_start_page(buffer),
-					 buffer_start_page(buffer) + PAGE_SIZE);
-	}
-	list_del(&buffer->entry);
-	kfree(buffer);
-}
-
-static void binder_free_buf_locked(struct binder_alloc *alloc,
-				   struct binder_buffer *buffer)
-{
-	size_t size, buffer_size;
-
-	buffer_size = binder_alloc_buffer_size(alloc, buffer);
-
-	size = ALIGN(buffer->data_size, sizeof(void *)) +
-		ALIGN(buffer->offsets_size, sizeof(void *)) +
-		ALIGN(buffer->extra_buffers_size, sizeof(void *));
-
-	binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-		     "%d: binder_free_buf %pK size %zd buffer_size %zd\n",
-		      alloc->pid, buffer, size, buffer_size);
-
-	BUG_ON(buffer->free);
-	BUG_ON(size > buffer_size);
-	BUG_ON(buffer->transaction != NULL);
-	BUG_ON(buffer->user_data < alloc->buffer);
-	BUG_ON(buffer->user_data > alloc->buffer + alloc->buffer_size);
-
-	if (buffer->async_transaction) {
-		alloc->free_async_space += buffer_size + sizeof(struct binder_buffer);
-
-		binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC_ASYNC,
-			     "%d: binder_free_buf size %zd async free %zd\n",
-			      alloc->pid, size, alloc->free_async_space);
-	}
-
-	binder_update_page_range(alloc, 0,
-		(void __user *)PAGE_ALIGN((uintptr_t)buffer->user_data),
-		(void __user *)(((uintptr_t)
-			  buffer->user_data + buffer_size) & PAGE_MASK));
-
-	rb_erase(&buffer->rb_node, &alloc->allocated_buffers);
-	buffer->free = 1;
-	if (!list_is_last(&buffer->entry, &alloc->buffers)) {
-		struct binder_buffer *next = binder_buffer_next(buffer);
-
-		if (next->free) {
-			rb_erase(&next->rb_node, &alloc->free_buffers);
-			binder_delete_free_buffer(alloc, next);
-		}
-	}
-	if (alloc->buffers.next != &buffer->entry) {
-		struct binder_buffer *prev = binder_buffer_prev(buffer);
-
-		if (prev->free) {
-			binder_delete_free_buffer(alloc, buffer);
-			rb_erase(&prev->rb_node, &alloc->free_buffers);
-			buffer = prev;
-		}
-	}
-	binder_insert_free_buffer(alloc, buffer);
-}
-
-static void binder_alloc_clear_buf(struct binder_alloc *alloc,
-				   struct binder_buffer *buffer);
-/**
- * binder_alloc_free_buf() - free a binder buffer
- * @alloc:	binder_alloc for this proc
- * @buffer:	kernel pointer to buffer
- *
- * Free the buffer allocated via binder_alloc_new_buf()
- */
-void binder_alloc_free_buf(struct binder_alloc *alloc,
-			    struct binder_buffer *buffer)
-{
-	/*
-	 * We could eliminate the call to binder_alloc_clear_buf()
-	 * from binder_alloc_deferred_release() by moving this to
-	 * binder_alloc_free_buf_locked(). However, that could
-	 * increase contention for the alloc mutex if clear_on_free
-	 * is used frequently for large buffers. The mutex is not
-	 * needed for correctness here.
-	 */
-	if (buffer->clear_on_free) {
-		binder_alloc_clear_buf(alloc, buffer);
-		buffer->clear_on_free = false;
-	}
-	mutex_lock(&alloc->mutex);
-	binder_free_buf_locked(alloc, buffer);
-	mutex_unlock(&alloc->mutex);
-}
-
-/**
- * binder_alloc_mmap_handler() - map virtual address space for proc
- * @alloc:	alloc structure for this proc
- * @vma:	vma passed to mmap()
- *
- * Called by binder_mmap() to initialize the space specified in
- * vma for allocating binder buffers
- *
- * Return:
- *      0 = success
- *      -EBUSY = address space already mapped
- *      -ENOMEM = failed to map memory to given address space
- */
-int binder_alloc_mmap_handler(struct binder_alloc *alloc,
-			      struct vm_area_struct *vma)
-{
-	int ret;
-	const char *failure_string;
-	struct binder_buffer *buffer;
-
-	if (unlikely(vma->vm_mm != alloc->mm)) {
-		ret = -EINVAL;
-		failure_string = "invalid vma->vm_mm";
-		goto err_invalid_mm;
-	}
-
-	mutex_lock(&binder_alloc_mmap_lock);
-	if (alloc->buffer_size) {
-		ret = -EBUSY;
-		failure_string = "already mapped";
-		goto err_already_mapped;
-	}
-	alloc->buffer_size = min_t(unsigned long, vma->vm_end - vma->vm_start,
-				   SZ_4M);
-	mutex_unlock(&binder_alloc_mmap_lock);
-
-	alloc->buffer = (void __user *)vma->vm_start;
-
-	alloc->pages = kcalloc(alloc->buffer_size / PAGE_SIZE,
-			       sizeof(alloc->pages[0]),
-			       GFP_KERNEL);
-	if (alloc->pages == NULL) {
-		ret = -ENOMEM;
-		failure_string = "alloc page array";
-		goto err_alloc_pages_failed;
-	}
-
-	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
-	if (!buffer) {
-		ret = -ENOMEM;
-		failure_string = "alloc buffer struct";
-		goto err_alloc_buf_struct_failed;
-	}
-
-	buffer->user_data = alloc->buffer;
-	list_add(&buffer->entry, &alloc->buffers);
-	buffer->free = 1;
-	binder_insert_free_buffer(alloc, buffer);
-	alloc->free_async_space = alloc->buffer_size / 2;
-
-	/* Signal binder_alloc is fully initialized */
-	binder_alloc_set_vma(alloc, vma);
-
-	return 0;
-
-err_alloc_buf_struct_failed:
-	kfree(alloc->pages);
-	alloc->pages = NULL;
-err_alloc_pages_failed:
-	alloc->buffer = NULL;
-	mutex_lock(&binder_alloc_mmap_lock);
-	alloc->buffer_size = 0;
-err_already_mapped:
-	mutex_unlock(&binder_alloc_mmap_lock);
-err_invalid_mm:
-	binder_alloc_debug(BINDER_DEBUG_USER_ERROR,
-			   "%s: %d %lx-%lx %s failed %d\n", __func__,
-			   alloc->pid, vma->vm_start, vma->vm_end,
-			   failure_string, ret);
-	return ret;
-}
-
-
-void binder_alloc_deferred_release(struct binder_alloc *alloc)
-{
-	struct rb_node *n;
-	int buffers, page_count;
-	struct binder_buffer *buffer;
-
-	buffers = 0;
-	mutex_lock(&alloc->mutex);
-	BUG_ON(alloc->vma);
-
-	while ((n = rb_first(&alloc->allocated_buffers))) {
-		buffer = rb_entry(n, struct binder_buffer, rb_node);
-
-		/* Transaction should already have been freed */
-		BUG_ON(buffer->transaction);
-
-		if (buffer->clear_on_free) {
-			binder_alloc_clear_buf(alloc, buffer);
-			buffer->clear_on_free = false;
-		}
-		binder_free_buf_locked(alloc, buffer);
-		buffers++;
-	}
-
-	while (!list_empty(&alloc->buffers)) {
-		buffer = list_first_entry(&alloc->buffers,
-					  struct binder_buffer, entry);
-		WARN_ON(!buffer->free);
-
-		list_del(&buffer->entry);
-		WARN_ON_ONCE(!list_empty(&alloc->buffers));
-		kfree(buffer);
-	}
-
-	page_count = 0;
-	if (alloc->pages) {
-		int i;
-
-		for (i = 0; i < alloc->buffer_size / PAGE_SIZE; i++) {
-			void __user *page_addr;
-			bool on_lru;
-
-			if (!alloc->pages[i].page_ptr)
-				continue;
-
-			on_lru = list_lru_del(&binder_alloc_lru,
-					      &alloc->pages[i].lru);
-			page_addr = alloc->buffer + i * PAGE_SIZE;
-			binder_alloc_debug(BINDER_DEBUG_BUFFER_ALLOC,
-				     "%s: %d: page %d at %pK %s\n",
-				     __func__, alloc->pid, i, page_addr,
-				     on_lru ? "on lru" : "active");
-			__free_page(alloc->pages[i].page_ptr);
-			page_count++;
-		}
-		kfree(alloc->pages);
-	}
-	mutex_unlock(&alloc->mutex);
-	if (alloc->mm)
-		mmdrop(alloc->mm);
-
-	binder_alloc_debug(BINDER_DEBUG_OPEN_CLOSE,
-		     "%s: %d buffers %d, pages %d\n",
-		     __func__, alloc->pid, buffers, page_count);
-}
-
-static void print_binder_buffer(struct seq_file *m, const char *prefix,
-				struct binder_buffer *buffer)
-{
-	seq_printf(m, "%s %d: %pK size %zd:%zd:%zd %s\n",
-		   prefix, buffer->debug_id, buffer->user_data,
-		   buffer->data_size, buffer->offsets_size,
-		   buffer->extra_buffers_size,
-		   buffer->transaction ? "active" : "delivered");
-}
-
-/**
- * binder_alloc_print_allocated() - print buffer info
- * @m:     seq_file for output via seq_printf()
- * @alloc: binder_alloc for this proc
- *
- * Prints information about every buffer associated with
- * the binder_alloc state to the given seq_file
- */
-void binder_alloc_print_allocated(struct seq_file *m,
-				  struct binder_alloc *alloc)
-{
-	struct rb_node *n;
-
-	mutex_lock(&alloc->mutex);
-	for (n = rb_first(&alloc->allocated_buffers); n != NULL; n = rb_next(n))
-		print_binder_buffer(m, "  buffer",
-				    rb_entry(n, struct binder_buffer, rb_node));
-	mutex_unlock(&alloc->mutex);
-}
-
-/**
- * binder_alloc_print_pages() - print page usage
- * @m:     seq_file for output via seq_printf()
- * @alloc: binder_alloc for this proc
- */
-void binder_alloc_print_pages(struct seq_file *m,
-			      struct binder_alloc *alloc)
-{
-	struct binder_lru_page *page;
-	int i;
-	int active = 0;
-	int lru = 0;
-	int free = 0;
-
-	mutex_lock(&alloc->mutex);
-	/*
-	 * Make sure the binder_alloc is fully initialized, otherwise we might
-	 * read inconsistent state.
-	 */
-	if (binder_alloc_get_vma(alloc) != NULL) {
-		for (i = 0; i < alloc->buffer_size / PAGE_SIZE; i++) {
-			page = &alloc->pages[i];
-			if (!page->page_ptr)
-				free++;
-			else if (list_empty(&page->lru))
-				active++;
-			else
-				lru++;
-		}
-	}
-	mutex_unlock(&alloc->mutex);
-	seq_printf(m, "  pages: %d:%d:%d\n", active, lru, free);
-	seq_printf(m, "  pages high watermark: %zu\n", alloc->pages_high);
-}
-
-/**
- * binder_alloc_get_allocated_count() - return count of buffers
- * @alloc: binder_alloc for this proc
- *
- * Return: count of allocated buffers
- */
-int binder_alloc_get_allocated_count(struct binder_alloc *alloc)
-{
-	struct rb_node *n;
-	int count = 0;
-
-	mutex_lock(&alloc->mutex);
-	for (n = rb_first(&alloc->allocated_buffers); n != NULL; n = rb_next(n))
-		count++;
-	mutex_unlock(&alloc->mutex);
-	return count;
-}
-
-
-/**
- * binder_alloc_vma_close() - invalidate address space
- * @alloc: binder_alloc for this proc
- *
- * Called from binder_vma_close() when releasing address space.
- * Clears alloc->vma to prevent new incoming transactions from
- * allocating more buffers.
- */
-void binder_alloc_vma_close(struct binder_alloc *alloc)
-{
-	binder_alloc_set_vma(alloc, NULL);
-}
-
-/**
- * binder_alloc_free_page() - shrinker callback to free pages
- * @item:   item to free
- * @lock:   lock protecting the item
- * @cb_arg: callback argument
- *
- * Called from list_lru_walk() in binder_shrink_scan() to free
- * up pages when the system is under memory pressure.
- */
-enum lru_status binder_alloc_free_page(struct list_head *item,
-				       struct list_lru_one *lru,
-				       spinlock_t *lock,
-				       void *cb_arg)
-	__must_hold(lock)
-{
-	struct mm_struct *mm = NULL;
-	struct binder_lru_page *page = container_of(item,
-						    struct binder_lru_page,
-						    lru);
-	struct binder_alloc *alloc;
-	uintptr_t page_addr;
-	size_t index;
-	struct vm_area_struct *vma;
-
-	alloc = page->alloc;
-	if (!mutex_trylock(&alloc->mutex))
-		goto err_get_alloc_mutex_failed;
-
-	if (!page->page_ptr)
-		goto err_page_already_freed;
-
-	index = page - alloc->pages;
-	page_addr = (uintptr_t)alloc->buffer + index * PAGE_SIZE;
-
-	mm = alloc->mm;
-	if (!mmget_not_zero(mm))
-		goto err_mmget;
-	if (!mmap_read_trylock(mm))
-		goto err_mmap_read_lock_failed;
-	vma = binder_alloc_get_vma(alloc);
-
-	list_lru_isolate(lru, item);
-	spin_unlock(lock);
-
-	if (vma) {
-		trace_binder_unmap_user_start(alloc, index);
-
-		zap_page_range_single(vma, page_addr, PAGE_SIZE, NULL);
-
-		trace_binder_unmap_user_end(alloc, index);
-	}
-	mmap_read_unlock(mm);
-	mmput_async(mm);
-
-	trace_binder_unmap_kernel_start(alloc, index);
-
-	__free_page(page->page_ptr);
-	page->page_ptr = NULL;
-
-	trace_binder_unmap_kernel_end(alloc, index);
-
-	spin_lock(lock);
-	mutex_unlock(&alloc->mutex);
-	return LRU_REMOVED_RETRY;
-
-err_mmap_read_lock_failed:
-	mmput_async(mm);
-err_mmget:
-err_page_already_freed:
-	mutex_unlock(&alloc->mutex);
-err_get_alloc_mutex_failed:
-	return LRU_SKIP;
-}
-
-static unsigned long
-binder_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
-{
-	return list_lru_count(&binder_alloc_lru);
-}
-
-static unsigned long
-binder_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
-{
-	return list_lru_walk(&binder_alloc_lru, binder_alloc_free_page,
-			    NULL, sc->nr_to_scan);
-}
-
-static struct shrinker binder_shrinker = {
-	.count_objects = binder_shrink_count,
-	.scan_objects = binder_shrink_scan,
-	.seeks = DEFAULT_SEEKS,
-};
-
-/**
- * binder_alloc_init() - called by binder_open() for per-proc initialization
- * @alloc: binder_alloc for this proc
- *
- * Called from binder_open() to initialize binder_alloc fields for
- * new binder proc
- */
-void binder_alloc_init(struct binder_alloc *alloc)
-{
-	alloc->pid = current->group_leader->pid;
-	alloc->mm = current->mm;
-	mmgrab(alloc->mm);
-	mutex_init(&alloc->mutex);
-	INIT_LIST_HEAD(&alloc->buffers);
-}
-
-int binder_alloc_shrinker_init(void)
-{
-	int ret = list_lru_init(&binder_alloc_lru);
-
-	if (ret == 0) {
-		ret = register_shrinker(&binder_shrinker, "android-binder");
-		if (ret)
-			list_lru_destroy(&binder_alloc_lru);
-	}
-	return ret;
-}
-
-void binder_alloc_shrinker_exit(void)
-{
-	unregister_shrinker(&binder_shrinker);
-	list_lru_destroy(&binder_alloc_lru);
-}
-
-/**
- * check_buffer() - verify that buffer/offset is safe to access
- * @alloc: binder_alloc for this proc
- * @buffer: binder buffer to be accessed
- * @offset: offset into @buffer data
- * @bytes: bytes to access from offset
- *
- * Check that the @offset/@...es are within the size of the given
- * @buffer and that the buffer is currently active and not freeable.
- * Offsets must also be multiples of sizeof(u32). The kernel is
- * allowed to touch the buffer in two cases:
- *
- * 1) when the buffer is being created:
- *     (buffer->free == 0 && buffer->allow_user_free == 0)
- * 2) when the buffer is being torn down:
- *     (buffer->free == 0 && buffer->transaction == NULL).
- *
- * Return: true if the buffer is safe to access
- */
-static inline bool check_buffer(struct binder_alloc *alloc,
-				struct binder_buffer *buffer,
-				binder_size_t offset, size_t bytes)
-{
-	size_t buffer_size = binder_alloc_buffer_size(alloc, buffer);
-
-	return buffer_size >= bytes &&
-		offset <= buffer_size - bytes &&
-		IS_ALIGNED(offset, sizeof(u32)) &&
-		!buffer->free &&
-		(!buffer->allow_user_free || !buffer->transaction);
-}
-
-/**
- * binder_alloc_get_page() - get kernel pointer for given buffer offset
- * @alloc: binder_alloc for this proc
- * @buffer: binder buffer to be accessed
- * @buffer_offset: offset into @buffer data
- * @pgoffp: address to copy final page offset to
- *
- * Lookup the struct page corresponding to the address
- * at @buffer_offset into @buffer->user_data. If @pgoffp is not
- * NULL, the byte-offset into the page is written there.
- *
- * The caller is responsible to ensure that the offset points
- * to a valid address within the @buffer and that @buffer is
- * not freeable by the user. Since it can't be freed, we are
- * guaranteed that the corresponding elements of @alloc->pages[]
- * cannot change.
- *
- * Return: struct page
- */
-static struct page *binder_alloc_get_page(struct binder_alloc *alloc,
-					  struct binder_buffer *buffer,
-					  binder_size_t buffer_offset,
-					  pgoff_t *pgoffp)
-{
-	binder_size_t buffer_space_offset = buffer_offset +
-		(buffer->user_data - alloc->buffer);
-	pgoff_t pgoff = buffer_space_offset & ~PAGE_MASK;
-	size_t index = buffer_space_offset >> PAGE_SHIFT;
-	struct binder_lru_page *lru_page;
-
-	lru_page = &alloc->pages[index];
-	*pgoffp = pgoff;
-	return lru_page->page_ptr;
-}
-
-/**
- * binder_alloc_clear_buf() - zero out buffer
- * @alloc: binder_alloc for this proc
- * @buffer: binder buffer to be cleared
- *
- * memset the given buffer to 0
- */
-static void binder_alloc_clear_buf(struct binder_alloc *alloc,
-				   struct binder_buffer *buffer)
-{
-	size_t bytes = binder_alloc_buffer_size(alloc, buffer);
-	binder_size_t buffer_offset = 0;
-
-	while (bytes) {
-		unsigned long size;
-		struct page *page;
-		pgoff_t pgoff;
-
-		page = binder_alloc_get_page(alloc, buffer,
-					     buffer_offset, &pgoff);
-		size = min_t(size_t, bytes, PAGE_SIZE - pgoff);
-		memset_page(page, pgoff, 0, size);
-		bytes -= size;
-		buffer_offset += size;
-	}
-}
-
-/**
- * binder_alloc_copy_user_to_buffer() - copy src user to tgt user
- * @alloc: binder_alloc for this proc
- * @buffer: binder buffer to be accessed
- * @buffer_offset: offset into @buffer data
- * @from: userspace pointer to source buffer
- * @bytes: bytes to copy
- *
- * Copy bytes from source userspace to target buffer.
- *
- * Return: bytes remaining to be copied
- */
-unsigned long
-binder_alloc_copy_user_to_buffer(struct binder_alloc *alloc,
-				 struct binder_buffer *buffer,
-				 binder_size_t buffer_offset,
-				 const void __user *from,
-				 size_t bytes)
-{
-	if (!check_buffer(alloc, buffer, buffer_offset, bytes))
-		return bytes;
-
-	while (bytes) {
-		unsigned long size;
-		unsigned long ret;
-		struct page *page;
-		pgoff_t pgoff;
-		void *kptr;
-
-		page = binder_alloc_get_page(alloc, buffer,
-					     buffer_offset, &pgoff);
-		size = min_t(size_t, bytes, PAGE_SIZE - pgoff);
-		kptr = kmap_local_page(page) + pgoff;
-		ret = copy_from_user(kptr, from, size);
-		kunmap_local(kptr);
-		if (ret)
-			return bytes - size + ret;
-		bytes -= size;
-		from += size;
-		buffer_offset += size;
-	}
-	return 0;
-}
-
-static int binder_alloc_do_buffer_copy(struct binder_alloc *alloc,
-				       bool to_buffer,
-				       struct binder_buffer *buffer,
-				       binder_size_t buffer_offset,
-				       void *ptr,
-				       size_t bytes)
-{
-	/* All copies must be 32-bit aligned and 32-bit size */
-	if (!check_buffer(alloc, buffer, buffer_offset, bytes))
-		return -EINVAL;
-
-	while (bytes) {
-		unsigned long size;
-		struct page *page;
-		pgoff_t pgoff;
-
-		page = binder_alloc_get_page(alloc, buffer,
-					     buffer_offset, &pgoff);
-		size = min_t(size_t, bytes, PAGE_SIZE - pgoff);
-		if (to_buffer)
-			memcpy_to_page(page, pgoff, ptr, size);
-		else
-			memcpy_from_page(ptr, page, pgoff, size);
-		bytes -= size;
-		pgoff = 0;
-		ptr = ptr + size;
-		buffer_offset += size;
-	}
-	return 0;
-}
-
-int binder_alloc_copy_to_buffer(struct binder_alloc *alloc,
-				struct binder_buffer *buffer,
-				binder_size_t buffer_offset,
-				void *src,
-				size_t bytes)
-{
-	return binder_alloc_do_buffer_copy(alloc, true, buffer, buffer_offset,
-					   src, bytes);
-}
-
-int binder_alloc_copy_from_buffer(struct binder_alloc *alloc,
-				  void *dest,
-				  struct binder_buffer *buffer,
-				  binder_size_t buffer_offset,
-				  size_t bytes)
-{
-	return binder_alloc_do_buffer_copy(alloc, false, buffer, buffer_offset,
-					   dest, bytes);
-}
-
diff --git a/drivers/android/binderfs.c b/drivers/android/binderfs.c
deleted file mode 100644
index 420dc9cbf774..000000000000
--- a/drivers/android/binderfs.c
+++ /dev/null
@@ -1,827 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/compiler_types.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/fsnotify.h>
-#include <linux/gfp.h>
-#include <linux/idr.h>
-#include <linux/init.h>
-#include <linux/ipc_namespace.h>
-#include <linux/kdev_t.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/namei.h>
-#include <linux/magic.h>
-#include <linux/major.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/mount.h>
-#include <linux/fs_parser.h>
-#include <linux/sched.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/spinlock_types.h>
-#include <linux/stddef.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/uaccess.h>
-#include <linux/user_namespace.h>
-#include <linux/xarray.h>
-#include <uapi/asm-generic/errno-base.h>
-#include <uapi/linux/android/binder.h>
-#include <uapi/linux/android/binderfs.h>
-
-#include "binder_internal.h"
-
-#define FIRST_INODE 1
-#define SECOND_INODE 2
-#define INODE_OFFSET 3
-#define BINDERFS_MAX_MINOR (1U << MINORBITS)
-/* Ensure that the initial ipc namespace always has devices available. */
-#define BINDERFS_MAX_MINOR_CAPPED (BINDERFS_MAX_MINOR - 4)
-
-static dev_t binderfs_dev;
-static DEFINE_MUTEX(binderfs_minors_mutex);
-static DEFINE_IDA(binderfs_minors);
-
-enum binderfs_param {
-	Opt_max,
-	Opt_stats_mode,
-};
-
-enum binderfs_stats_mode {
-	binderfs_stats_mode_unset,
-	binderfs_stats_mode_global,
-};
-
-struct binder_features {
-	bool oneway_spam_detection;
-	bool extended_error;
-};
-
-static const struct constant_table binderfs_param_stats[] = {
-	{ "global", binderfs_stats_mode_global },
-	{}
-};
-
-static const struct fs_parameter_spec binderfs_fs_parameters[] = {
-	fsparam_u32("max",	Opt_max),
-	fsparam_enum("stats",	Opt_stats_mode, binderfs_param_stats),
-	{}
-};
-
-static struct binder_features binder_features = {
-	.oneway_spam_detection = true,
-	.extended_error = true,
-};
-
-static inline struct binderfs_info *BINDERFS_SB(const struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-bool is_binderfs_device(const struct inode *inode)
-{
-	if (inode->i_sb->s_magic == BINDERFS_SUPER_MAGIC)
-		return true;
-
-	return false;
-}
-
-/**
- * binderfs_binder_device_create - allocate inode from super block of a
- *                                 binderfs mount
- * @ref_inode: inode from wich the super block will be taken
- * @userp:     buffer to copy information about new device for userspace to
- * @req:       struct binderfs_device as copied from userspace
- *
- * This function allocates a new binder_device and reserves a new minor
- * number for it.
- * Minor numbers are limited and tracked globally in binderfs_minors. The
- * function will stash a struct binder_device for the specific binder
- * device in i_private of the inode.
- * It will go on to allocate a new inode from the super block of the
- * filesystem mount, stash a struct binder_device in its i_private field
- * and attach a dentry to that inode.
- *
- * Return: 0 on success, negative errno on failure
- */
-static int binderfs_binder_device_create(struct inode *ref_inode,
-					 struct binderfs_device __user *userp,
-					 struct binderfs_device *req)
-{
-	int minor, ret;
-	struct dentry *dentry, *root;
-	struct binder_device *device;
-	char *name = NULL;
-	size_t name_len;
-	struct inode *inode = NULL;
-	struct super_block *sb = ref_inode->i_sb;
-	struct binderfs_info *info = sb->s_fs_info;
-#if defined(CONFIG_IPC_NS)
-	bool use_reserve = (info->ipc_ns == &init_ipc_ns);
-#else
-	bool use_reserve = true;
-#endif
-
-	/* Reserve new minor number for the new device. */
-	mutex_lock(&binderfs_minors_mutex);
-	if (++info->device_count <= info->mount_opts.max)
-		minor = ida_alloc_max(&binderfs_minors,
-				      use_reserve ? BINDERFS_MAX_MINOR :
-						    BINDERFS_MAX_MINOR_CAPPED,
-				      GFP_KERNEL);
-	else
-		minor = -ENOSPC;
-	if (minor < 0) {
-		--info->device_count;
-		mutex_unlock(&binderfs_minors_mutex);
-		return minor;
-	}
-	mutex_unlock(&binderfs_minors_mutex);
-
-	ret = -ENOMEM;
-	device = kzalloc(sizeof(*device), GFP_KERNEL);
-	if (!device)
-		goto err;
-
-	inode = new_inode(sb);
-	if (!inode)
-		goto err;
-
-	inode->i_ino = minor + INODE_OFFSET;
-	simple_inode_init_ts(inode);
-	init_special_inode(inode, S_IFCHR | 0600,
-			   MKDEV(MAJOR(binderfs_dev), minor));
-	inode->i_fop = &binder_fops;
-	inode->i_uid = info->root_uid;
-	inode->i_gid = info->root_gid;
-
-	req->name[BINDERFS_MAX_NAME] = '\0'; /* NUL-terminate */
-	name_len = strlen(req->name);
-	/* Make sure to include terminating NUL byte */
-	name = kmemdup(req->name, name_len + 1, GFP_KERNEL);
-	if (!name)
-		goto err;
-
-	refcount_set(&device->ref, 1);
-	device->binderfs_inode = inode;
-	device->context.binder_context_mgr_uid = INVALID_UID;
-	device->context.name = name;
-	device->miscdev.name = name;
-	device->miscdev.minor = minor;
-	mutex_init(&device->context.context_mgr_node_lock);
-
-	req->major = MAJOR(binderfs_dev);
-	req->minor = minor;
-
-	if (userp && copy_to_user(userp, req, sizeof(*req))) {
-		ret = -EFAULT;
-		goto err;
-	}
-
-	root = sb->s_root;
-	inode_lock(d_inode(root));
-
-	/* look it up */
-	dentry = lookup_one_len(name, root, name_len);
-	if (IS_ERR(dentry)) {
-		inode_unlock(d_inode(root));
-		ret = PTR_ERR(dentry);
-		goto err;
-	}
-
-	if (d_really_is_positive(dentry)) {
-		/* already exists */
-		dput(dentry);
-		inode_unlock(d_inode(root));
-		ret = -EEXIST;
-		goto err;
-	}
-
-	inode->i_private = device;
-	d_instantiate(dentry, inode);
-	fsnotify_create(root->d_inode, dentry);
-	inode_unlock(d_inode(root));
-
-	return 0;
-
-err:
-	kfree(name);
-	kfree(device);
-	mutex_lock(&binderfs_minors_mutex);
-	--info->device_count;
-	ida_free(&binderfs_minors, minor);
-	mutex_unlock(&binderfs_minors_mutex);
-	iput(inode);
-
-	return ret;
-}
-
-/**
- * binder_ctl_ioctl - handle binder device node allocation requests
- *
- * The request handler for the binder-control device. All requests operate on
- * the binderfs mount the binder-control device resides in:
- * - BINDER_CTL_ADD
- *   Allocate a new binder device.
- *
- * Return: %0 on success, negative errno on failure.
- */
-static long binder_ctl_ioctl(struct file *file, unsigned int cmd,
-			     unsigned long arg)
-{
-	int ret = -EINVAL;
-	struct inode *inode = file_inode(file);
-	struct binderfs_device __user *device = (struct binderfs_device __user *)arg;
-	struct binderfs_device device_req;
-
-	switch (cmd) {
-	case BINDER_CTL_ADD:
-		ret = copy_from_user(&device_req, device, sizeof(device_req));
-		if (ret) {
-			ret = -EFAULT;
-			break;
-		}
-
-		ret = binderfs_binder_device_create(inode, device, &device_req);
-		break;
-	default:
-		break;
-	}
-
-	return ret;
-}
-
-static void binderfs_evict_inode(struct inode *inode)
-{
-	struct binder_device *device = inode->i_private;
-	struct binderfs_info *info = BINDERFS_SB(inode->i_sb);
-
-	clear_inode(inode);
-
-	if (!S_ISCHR(inode->i_mode) || !device)
-		return;
-
-	mutex_lock(&binderfs_minors_mutex);
-	--info->device_count;
-	ida_free(&binderfs_minors, device->miscdev.minor);
-	mutex_unlock(&binderfs_minors_mutex);
-
-	if (refcount_dec_and_test(&device->ref)) {
-		kfree(device->context.name);
-		kfree(device);
-	}
-}
-
-static int binderfs_fs_context_parse_param(struct fs_context *fc,
-					   struct fs_parameter *param)
-{
-	int opt;
-	struct binderfs_mount_opts *ctx = fc->fs_private;
-	struct fs_parse_result result;
-
-	opt = fs_parse(fc, binderfs_fs_parameters, param, &result);
-	if (opt < 0)
-		return opt;
-
-	switch (opt) {
-	case Opt_max:
-		if (result.uint_32 > BINDERFS_MAX_MINOR)
-			return invalfc(fc, "Bad value for '%s'", param->key);
-
-		ctx->max = result.uint_32;
-		break;
-	case Opt_stats_mode:
-		if (!capable(CAP_SYS_ADMIN))
-			return -EPERM;
-
-		ctx->stats_mode = result.uint_32;
-		break;
-	default:
-		return invalfc(fc, "Unsupported parameter '%s'", param->key);
-	}
-
-	return 0;
-}
-
-static int binderfs_fs_context_reconfigure(struct fs_context *fc)
-{
-	struct binderfs_mount_opts *ctx = fc->fs_private;
-	struct binderfs_info *info = BINDERFS_SB(fc->root->d_sb);
-
-	if (info->mount_opts.stats_mode != ctx->stats_mode)
-		return invalfc(fc, "Binderfs stats mode cannot be changed during a remount");
-
-	info->mount_opts.stats_mode = ctx->stats_mode;
-	info->mount_opts.max = ctx->max;
-	return 0;
-}
-
-static int binderfs_show_options(struct seq_file *seq, struct dentry *root)
-{
-	struct binderfs_info *info = BINDERFS_SB(root->d_sb);
-
-	if (info->mount_opts.max <= BINDERFS_MAX_MINOR)
-		seq_printf(seq, ",max=%d", info->mount_opts.max);
-
-	switch (info->mount_opts.stats_mode) {
-	case binderfs_stats_mode_unset:
-		break;
-	case binderfs_stats_mode_global:
-		seq_printf(seq, ",stats=global");
-		break;
-	}
-
-	return 0;
-}
-
-static const struct super_operations binderfs_super_ops = {
-	.evict_inode    = binderfs_evict_inode,
-	.show_options	= binderfs_show_options,
-	.statfs         = simple_statfs,
-};
-
-static inline bool is_binderfs_control_device(const struct dentry *dentry)
-{
-	struct binderfs_info *info = dentry->d_sb->s_fs_info;
-
-	return info->control_dentry == dentry;
-}
-
-static int binderfs_rename(struct mnt_idmap *idmap,
-			   struct inode *old_dir, struct dentry *old_dentry,
-			   struct inode *new_dir, struct dentry *new_dentry,
-			   unsigned int flags)
-{
-	if (is_binderfs_control_device(old_dentry) ||
-	    is_binderfs_control_device(new_dentry))
-		return -EPERM;
-
-	return simple_rename(idmap, old_dir, old_dentry, new_dir,
-			     new_dentry, flags);
-}
-
-static int binderfs_unlink(struct inode *dir, struct dentry *dentry)
-{
-	if (is_binderfs_control_device(dentry))
-		return -EPERM;
-
-	return simple_unlink(dir, dentry);
-}
-
-static const struct file_operations binder_ctl_fops = {
-	.owner		= THIS_MODULE,
-	.open		= nonseekable_open,
-	.unlocked_ioctl	= binder_ctl_ioctl,
-	.compat_ioctl	= binder_ctl_ioctl,
-	.llseek		= noop_llseek,
-};
-
-/**
- * binderfs_binder_ctl_create - create a new binder-control device
- * @sb: super block of the binderfs mount
- *
- * This function creates a new binder-control device node in the binderfs mount
- * referred to by @sb.
- *
- * Return: 0 on success, negative errno on failure
- */
-static int binderfs_binder_ctl_create(struct super_block *sb)
-{
-	int minor, ret;
-	struct dentry *dentry;
-	struct binder_device *device;
-	struct inode *inode = NULL;
-	struct dentry *root = sb->s_root;
-	struct binderfs_info *info = sb->s_fs_info;
-#if defined(CONFIG_IPC_NS)
-	bool use_reserve = (info->ipc_ns == &init_ipc_ns);
-#else
-	bool use_reserve = true;
-#endif
-
-	device = kzalloc(sizeof(*device), GFP_KERNEL);
-	if (!device)
-		return -ENOMEM;
-
-	/* If we have already created a binder-control node, return. */
-	if (info->control_dentry) {
-		ret = 0;
-		goto out;
-	}
-
-	ret = -ENOMEM;
-	inode = new_inode(sb);
-	if (!inode)
-		goto out;
-
-	/* Reserve a new minor number for the new device. */
-	mutex_lock(&binderfs_minors_mutex);
-	minor = ida_alloc_max(&binderfs_minors,
-			      use_reserve ? BINDERFS_MAX_MINOR :
-					    BINDERFS_MAX_MINOR_CAPPED,
-			      GFP_KERNEL);
-	mutex_unlock(&binderfs_minors_mutex);
-	if (minor < 0) {
-		ret = minor;
-		goto out;
-	}
-
-	inode->i_ino = SECOND_INODE;
-	simple_inode_init_ts(inode);
-	init_special_inode(inode, S_IFCHR | 0600,
-			   MKDEV(MAJOR(binderfs_dev), minor));
-	inode->i_fop = &binder_ctl_fops;
-	inode->i_uid = info->root_uid;
-	inode->i_gid = info->root_gid;
-
-	refcount_set(&device->ref, 1);
-	device->binderfs_inode = inode;
-	device->miscdev.minor = minor;
-
-	dentry = d_alloc_name(root, "binder-control");
-	if (!dentry)
-		goto out;
-
-	inode->i_private = device;
-	info->control_dentry = dentry;
-	d_add(dentry, inode);
-
-	return 0;
-
-out:
-	kfree(device);
-	iput(inode);
-
-	return ret;
-}
-
-static const struct inode_operations binderfs_dir_inode_operations = {
-	.lookup = simple_lookup,
-	.rename = binderfs_rename,
-	.unlink = binderfs_unlink,
-};
-
-static struct inode *binderfs_make_inode(struct super_block *sb, int mode)
-{
-	struct inode *ret;
-
-	ret = new_inode(sb);
-	if (ret) {
-		ret->i_ino = iunique(sb, BINDERFS_MAX_MINOR + INODE_OFFSET);
-		ret->i_mode = mode;
-		simple_inode_init_ts(ret);
-	}
-	return ret;
-}
-
-static struct dentry *binderfs_create_dentry(struct dentry *parent,
-					     const char *name)
-{
-	struct dentry *dentry;
-
-	dentry = lookup_one_len(name, parent, strlen(name));
-	if (IS_ERR(dentry))
-		return dentry;
-
-	/* Return error if the file/dir already exists. */
-	if (d_really_is_positive(dentry)) {
-		dput(dentry);
-		return ERR_PTR(-EEXIST);
-	}
-
-	return dentry;
-}
-
-void binderfs_remove_file(struct dentry *dentry)
-{
-	struct inode *parent_inode;
-
-	parent_inode = d_inode(dentry->d_parent);
-	inode_lock(parent_inode);
-	if (simple_positive(dentry)) {
-		dget(dentry);
-		simple_unlink(parent_inode, dentry);
-		d_delete(dentry);
-		dput(dentry);
-	}
-	inode_unlock(parent_inode);
-}
-
-struct dentry *binderfs_create_file(struct dentry *parent, const char *name,
-				    const struct file_operations *fops,
-				    void *data)
-{
-	struct dentry *dentry;
-	struct inode *new_inode, *parent_inode;
-	struct super_block *sb;
-
-	parent_inode = d_inode(parent);
-	inode_lock(parent_inode);
-
-	dentry = binderfs_create_dentry(parent, name);
-	if (IS_ERR(dentry))
-		goto out;
-
-	sb = parent_inode->i_sb;
-	new_inode = binderfs_make_inode(sb, S_IFREG | 0444);
-	if (!new_inode) {
-		dput(dentry);
-		dentry = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-
-	new_inode->i_fop = fops;
-	new_inode->i_private = data;
-	d_instantiate(dentry, new_inode);
-	fsnotify_create(parent_inode, dentry);
-
-out:
-	inode_unlock(parent_inode);
-	return dentry;
-}
-
-static struct dentry *binderfs_create_dir(struct dentry *parent,
-					  const char *name)
-{
-	struct dentry *dentry;
-	struct inode *new_inode, *parent_inode;
-	struct super_block *sb;
-
-	parent_inode = d_inode(parent);
-	inode_lock(parent_inode);
-
-	dentry = binderfs_create_dentry(parent, name);
-	if (IS_ERR(dentry))
-		goto out;
-
-	sb = parent_inode->i_sb;
-	new_inode = binderfs_make_inode(sb, S_IFDIR | 0755);
-	if (!new_inode) {
-		dput(dentry);
-		dentry = ERR_PTR(-ENOMEM);
-		goto out;
-	}
-
-	new_inode->i_fop = &simple_dir_operations;
-	new_inode->i_op = &simple_dir_inode_operations;
-
-	set_nlink(new_inode, 2);
-	d_instantiate(dentry, new_inode);
-	inc_nlink(parent_inode);
-	fsnotify_mkdir(parent_inode, dentry);
-
-out:
-	inode_unlock(parent_inode);
-	return dentry;
-}
-
-static int binder_features_show(struct seq_file *m, void *unused)
-{
-	bool *feature = m->private;
-
-	seq_printf(m, "%d\n", *feature);
-
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(binder_features);
-
-static int init_binder_features(struct super_block *sb)
-{
-	struct dentry *dentry, *dir;
-
-	dir = binderfs_create_dir(sb->s_root, "features");
-	if (IS_ERR(dir))
-		return PTR_ERR(dir);
-
-	dentry = binderfs_create_file(dir, "oneway_spam_detection",
-				      &binder_features_fops,
-				      &binder_features.oneway_spam_detection);
-	if (IS_ERR(dentry))
-		return PTR_ERR(dentry);
-
-	dentry = binderfs_create_file(dir, "extended_error",
-				      &binder_features_fops,
-				      &binder_features.extended_error);
-	if (IS_ERR(dentry))
-		return PTR_ERR(dentry);
-
-	return 0;
-}
-
-static int init_binder_logs(struct super_block *sb)
-{
-	struct dentry *binder_logs_root_dir, *dentry, *proc_log_dir;
-	const struct binder_debugfs_entry *db_entry;
-	struct binderfs_info *info;
-	int ret = 0;
-
-	binder_logs_root_dir = binderfs_create_dir(sb->s_root,
-						   "binder_logs");
-	if (IS_ERR(binder_logs_root_dir)) {
-		ret = PTR_ERR(binder_logs_root_dir);
-		goto out;
-	}
-
-	binder_for_each_debugfs_entry(db_entry) {
-		dentry = binderfs_create_file(binder_logs_root_dir,
-					      db_entry->name,
-					      db_entry->fops,
-					      db_entry->data);
-		if (IS_ERR(dentry)) {
-			ret = PTR_ERR(dentry);
-			goto out;
-		}
-	}
-
-	proc_log_dir = binderfs_create_dir(binder_logs_root_dir, "proc");
-	if (IS_ERR(proc_log_dir)) {
-		ret = PTR_ERR(proc_log_dir);
-		goto out;
-	}
-	info = sb->s_fs_info;
-	info->proc_log_dir = proc_log_dir;
-
-out:
-	return ret;
-}
-
-static int binderfs_fill_super(struct super_block *sb, struct fs_context *fc)
-{
-	int ret;
-	struct binderfs_info *info;
-	struct binderfs_mount_opts *ctx = fc->fs_private;
-	struct inode *inode = NULL;
-	struct binderfs_device device_info = {};
-	const char *name;
-	size_t len;
-
-	sb->s_blocksize = PAGE_SIZE;
-	sb->s_blocksize_bits = PAGE_SHIFT;
-
-	/*
-	 * The binderfs filesystem can be mounted by userns root in a
-	 * non-initial userns. By default such mounts have the SB_I_NODEV flag
-	 * set in s_iflags to prevent security issues where userns root can
-	 * just create random device nodes via mknod() since it owns the
-	 * filesystem mount. But binderfs does not allow to create any files
-	 * including devices nodes. The only way to create binder devices nodes
-	 * is through the binder-control device which userns root is explicitly
-	 * allowed to do. So removing the SB_I_NODEV flag from s_iflags is both
-	 * necessary and safe.
-	 */
-	sb->s_iflags &= ~SB_I_NODEV;
-	sb->s_iflags |= SB_I_NOEXEC;
-	sb->s_magic = BINDERFS_SUPER_MAGIC;
-	sb->s_op = &binderfs_super_ops;
-	sb->s_time_gran = 1;
-
-	sb->s_fs_info = kzalloc(sizeof(struct binderfs_info), GFP_KERNEL);
-	if (!sb->s_fs_info)
-		return -ENOMEM;
-	info = sb->s_fs_info;
-
-	info->ipc_ns = get_ipc_ns(current->nsproxy->ipc_ns);
-
-	info->root_gid = make_kgid(sb->s_user_ns, 0);
-	if (!gid_valid(info->root_gid))
-		info->root_gid = GLOBAL_ROOT_GID;
-	info->root_uid = make_kuid(sb->s_user_ns, 0);
-	if (!uid_valid(info->root_uid))
-		info->root_uid = GLOBAL_ROOT_UID;
-	info->mount_opts.max = ctx->max;
-	info->mount_opts.stats_mode = ctx->stats_mode;
-
-	inode = new_inode(sb);
-	if (!inode)
-		return -ENOMEM;
-
-	inode->i_ino = FIRST_INODE;
-	inode->i_fop = &simple_dir_operations;
-	inode->i_mode = S_IFDIR | 0755;
-	simple_inode_init_ts(inode);
-	inode->i_op = &binderfs_dir_inode_operations;
-	set_nlink(inode, 2);
-
-	sb->s_root = d_make_root(inode);
-	if (!sb->s_root)
-		return -ENOMEM;
-
-	ret = binderfs_binder_ctl_create(sb);
-	if (ret)
-		return ret;
-
-	name = binder_devices_param;
-	for (len = strcspn(name, ","); len > 0; len = strcspn(name, ",")) {
-		strscpy(device_info.name, name, len + 1);
-		ret = binderfs_binder_device_create(inode, NULL, &device_info);
-		if (ret)
-			return ret;
-		name += len;
-		if (*name == ',')
-			name++;
-	}
-
-	ret = init_binder_features(sb);
-	if (ret)
-		return ret;
-
-	if (info->mount_opts.stats_mode == binderfs_stats_mode_global)
-		return init_binder_logs(sb);
-
-	return 0;
-}
-
-static int binderfs_fs_context_get_tree(struct fs_context *fc)
-{
-	return get_tree_nodev(fc, binderfs_fill_super);
-}
-
-static void binderfs_fs_context_free(struct fs_context *fc)
-{
-	struct binderfs_mount_opts *ctx = fc->fs_private;
-
-	kfree(ctx);
-}
-
-static const struct fs_context_operations binderfs_fs_context_ops = {
-	.free		= binderfs_fs_context_free,
-	.get_tree	= binderfs_fs_context_get_tree,
-	.parse_param	= binderfs_fs_context_parse_param,
-	.reconfigure	= binderfs_fs_context_reconfigure,
-};
-
-static int binderfs_init_fs_context(struct fs_context *fc)
-{
-	struct binderfs_mount_opts *ctx;
-
-	ctx = kzalloc(sizeof(struct binderfs_mount_opts), GFP_KERNEL);
-	if (!ctx)
-		return -ENOMEM;
-
-	ctx->max = BINDERFS_MAX_MINOR;
-	ctx->stats_mode = binderfs_stats_mode_unset;
-
-	fc->fs_private = ctx;
-	fc->ops = &binderfs_fs_context_ops;
-
-	return 0;
-}
-
-static void binderfs_kill_super(struct super_block *sb)
-{
-	struct binderfs_info *info = sb->s_fs_info;
-
-	/*
-	 * During inode eviction struct binderfs_info is needed.
-	 * So first wipe the super_block then free struct binderfs_info.
-	 */
-	kill_litter_super(sb);
-
-	if (info && info->ipc_ns)
-		put_ipc_ns(info->ipc_ns);
-
-	kfree(info);
-}
-
-static struct file_system_type binder_fs_type = {
-	.name			= "binder",
-	.init_fs_context	= binderfs_init_fs_context,
-	.parameters		= binderfs_fs_parameters,
-	.kill_sb		= binderfs_kill_super,
-	.fs_flags		= FS_USERNS_MOUNT,
-};
-
-int __init init_binderfs(void)
-{
-	int ret;
-	const char *name;
-	size_t len;
-
-	/* Verify that the default binderfs device names are valid. */
-	name = binder_devices_param;
-	for (len = strcspn(name, ","); len > 0; len = strcspn(name, ",")) {
-		if (len > BINDERFS_MAX_NAME)
-			return -E2BIG;
-		name += len;
-		if (*name == ',')
-			name++;
-	}
-
-	/* Allocate new major number for binderfs. */
-	ret = alloc_chrdev_region(&binderfs_dev, 0, BINDERFS_MAX_MINOR,
-				  "binder");
-	if (ret)
-		return ret;
-
-	ret = register_filesystem(&binder_fs_type);
-	if (ret) {
-		unregister_chrdev_region(binderfs_dev, BINDERFS_MAX_MINOR);
-		return ret;
-	}
-
-	return ret;
-}

-- 
2.42.0.820.g83a721a137-goog

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