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Message-ID: <161657055090.398.16593859740560990844.tip-bot2@tip-bot2>
Date: Wed, 24 Mar 2021 07:22:30 -0000
From: "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: locking/core] locking/rtmutex: Remove rtmutex deadlock tester leftovers
The following commit has been merged into the locking/core branch of tip:
Commit-ID: ff033d34ec7244e6d86b4bbdd917ec0d54299f31
Gitweb: https://git.kernel.org/tip/ff033d34ec7244e6d86b4bbdd917ec0d54299f31
Author: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate: Tue, 23 Mar 2021 22:30:21 +01:00
Committer: Ingo Molnar <mingo@...nel.org>
CommitterDate: Wed, 24 Mar 2021 08:06:07 +01:00
locking/rtmutex: Remove rtmutex deadlock tester leftovers
The following debug members of struct rtmutex are unused:
- save_state: No users
- file,line: Printed if ::name is NULL. This is only used for non-futex
locks so ::name is never NULL
- magic: Assigned to NULL by rt_mutex_destroy(), no further usage
Remove them along with unused inlines and macros leftovers related to
the long gone deadlock tester.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20210323213707.630525866@linutronix.de
---
include/linux/rtmutex.h | 7 ++-----
kernel/locking/rtmutex-debug.c | 7 +------
kernel/locking/rtmutex-debug.h | 2 --
kernel/locking/rtmutex.c | 3 ---
kernel/locking/rtmutex.h | 2 --
kernel/locking/rtmutex_common.h | 1 -
6 files changed, 3 insertions(+), 19 deletions(-)
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 32f4a35..48b334b 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -32,10 +32,7 @@ struct rt_mutex {
struct rb_root_cached waiters;
struct task_struct *owner;
#ifdef CONFIG_DEBUG_RT_MUTEXES
- int save_state;
- const char *name, *file;
- int line;
- void *magic;
+ const char *name;
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
@@ -60,7 +57,7 @@ struct hrtimer_sleeper;
#ifdef CONFIG_DEBUG_RT_MUTEXES
# define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) \
- , .name = #mutexname, .file = __FILE__, .line = __LINE__
+ , .name = #mutexname
# define rt_mutex_init(mutex) \
do { \
diff --git a/kernel/locking/rtmutex-debug.c b/kernel/locking/rtmutex-debug.c
index 36e6910..7e411b9 100644
--- a/kernel/locking/rtmutex-debug.c
+++ b/kernel/locking/rtmutex-debug.c
@@ -42,12 +42,7 @@ static void printk_task(struct task_struct *p)
static void printk_lock(struct rt_mutex *lock, int print_owner)
{
- if (lock->name)
- printk(" [%p] {%s}\n",
- lock, lock->name);
- else
- printk(" [%p] {%s:%d}\n",
- lock, lock->file, lock->line);
+ printk(" [%p] {%s}\n", lock, lock->name);
if (print_owner && rt_mutex_owner(lock)) {
printk(".. ->owner: %p\n", lock->owner);
diff --git a/kernel/locking/rtmutex-debug.h b/kernel/locking/rtmutex-debug.h
index fc54971..772c9b0 100644
--- a/kernel/locking/rtmutex-debug.h
+++ b/kernel/locking/rtmutex-debug.h
@@ -22,8 +22,6 @@ extern void debug_rt_mutex_deadlock(enum rtmutex_chainwalk chwalk,
struct rt_mutex_waiter *waiter,
struct rt_mutex *lock);
extern void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter);
-# define debug_rt_mutex_reset_waiter(w) \
- do { (w)->deadlock_lock = NULL; } while (0)
static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *waiter,
enum rtmutex_chainwalk walk)
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index ca93e5d..11abc60 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1594,9 +1594,6 @@ void __sched rt_mutex_futex_unlock(struct rt_mutex *lock)
void rt_mutex_destroy(struct rt_mutex *lock)
{
WARN_ON(rt_mutex_is_locked(lock));
-#ifdef CONFIG_DEBUG_RT_MUTEXES
- lock->magic = NULL;
-#endif
}
EXPORT_SYMBOL_GPL(rt_mutex_destroy);
diff --git a/kernel/locking/rtmutex.h b/kernel/locking/rtmutex.h
index 732f96a..4dbdec1 100644
--- a/kernel/locking/rtmutex.h
+++ b/kernel/locking/rtmutex.h
@@ -11,7 +11,6 @@
* Non-debug version.
*/
-#define rt_mutex_deadlock_check(l) (0)
#define debug_rt_mutex_init_waiter(w) do { } while (0)
#define debug_rt_mutex_free_waiter(w) do { } while (0)
#define debug_rt_mutex_lock(l) do { } while (0)
@@ -21,7 +20,6 @@
#define debug_rt_mutex_init(m, n, k) do { } while (0)
#define debug_rt_mutex_deadlock(d, a ,l) do { } while (0)
#define debug_rt_mutex_print_deadlock(w) do { } while (0)
-#define debug_rt_mutex_reset_waiter(w) do { } while (0)
static inline void rt_mutex_print_deadlock(struct rt_mutex_waiter *w)
{
diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h
index a5007f0..aa04743 100644
--- a/kernel/locking/rtmutex_common.h
+++ b/kernel/locking/rtmutex_common.h
@@ -30,7 +30,6 @@ struct rt_mutex_waiter {
struct task_struct *task;
struct rt_mutex *lock;
#ifdef CONFIG_DEBUG_RT_MUTEXES
- unsigned long ip;
struct pid *deadlock_task_pid;
struct rt_mutex *deadlock_lock;
#endif
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