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Message-ID: <1331306445.25686.577.camel@gandalf.stny.rr.com>
Date: Fri, 09 Mar 2012 10:20:45 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>,
RT <linux-rt-users@...r.kernel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Carsten Emde <C.Emde@...dl.org>, John Kacur <jkacur@...hat.com>
Subject: [ANNOUNCE] 3.0.23-rt39
Dear RT Folks,
I'm pleased to announce the 3.0.23-rt39 stable release.
You can get this release via the git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
Head SHA1: abced2ac3332f6c70005c462c6bab6157f17f04b
Or to build 3.0.23-rt39 directly, the following patches should be applied:
http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.xz
http://www.kernel.org/pub/linux/kernel/v3.0/patch-3.0.23.xz
http://www.kernel.org/pub/linux/kernel/projects/rt/3.0/patch-3.0.23-rt39.patch.xz
You can also build from 3.0.23-rt38 by applying the incremental patch:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.0/incr/patch-3.0.23-rt38-rt39.patch.xz
Enjoy,
-- Steve
Changes from 3.0.23-rt38:
---
Andy Lutomirski (2):
x86-64-remove-vsyscall-number-3
x86-64-emulate-legacy-vsyscalls
Steven Rostedt (11):
revert-convert-xtime_lock-to-raw_seqlock
revert-seqlock-create-raw_seqlock
revert-seqlock-use-seqcount
revert-seqlock-remove-unused-functions
timer: Fix hotplug for -rt
futex/rt: Fix possible lockup when taking pi_lock in proxy handler
ring-buffer/rt: Check for irqs disabled before grabbing reader lock
sched/rt: Fix wait_task_interactive() to test rt_spin_lock state
lglock/rt: Use non-rt for_each_cpu() in -rt code
cpu: Make hotplug.lock a "sleeping" spinlock on RT
Linux 3.0.23-rt39
Thomas Gleixner (12):
x86: vdso: Remove bogus locking in update_vsyscall_tz()
x86: vdso: Use seqcount instead of seqlock
ia64: vsyscall: Use seqcount instead of seqlock
seqlock: Remove unused functions
seqlock: Use seqcount
seqlock: Provide seq_spin_* functions
fs: fs_struct use seqlock
fs: dentry use seqlock
timekeeping: Split xtime_lock
seqlock: Prevent rt starvation
fs: Protect open coded isize seqcount
net: u64_stat: Protect seqcount
----
arch/ia64/kernel/asm-offsets.c | 4 +-
arch/ia64/kernel/fsys.S | 2 +-
arch/ia64/kernel/fsyscall_gtod_data.h | 2 +-
arch/ia64/kernel/time.c | 10 +-
arch/powerpc/platforms/cell/spufs/inode.c | 6 +-
arch/x86/include/asm/irq_vectors.h | 6 +-
arch/x86/include/asm/traps.h | 4 +
arch/x86/include/asm/vgtod.h | 2 +-
arch/x86/include/asm/vsyscall.h | 12 ++
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/entry_64.S | 2 +
arch/x86/kernel/traps.c | 6 +
arch/x86/kernel/vmlinux.lds.S | 4 -
arch/x86/kernel/vsyscall_64.c | 289 ++++++++++++-----------------
arch/x86/kernel/vsyscall_emu_64.S | 27 +++
arch/x86/vdso/vclock_gettime.c | 16 +-
drivers/infiniband/hw/ipath/ipath_fs.c | 6 +-
drivers/infiniband/hw/qib/qib_fs.c | 6 +-
drivers/usb/core/inode.c | 12 +-
fs/9p/vfs_dir.c | 4 +-
fs/afs/dir.c | 4 +-
fs/autofs4/autofs_i.h | 24 ++--
fs/autofs4/expire.c | 44 +++---
fs/autofs4/root.c | 38 ++--
fs/btrfs/export.c | 4 +-
fs/ceph/caps.c | 8 +-
fs/ceph/debugfs.c | 8 +-
fs/ceph/dir.c | 26 ++--
fs/ceph/inode.c | 20 +-
fs/ceph/mds_client.c | 16 +-
fs/cifs/dir.c | 6 +-
fs/coda/cache.c | 4 +-
fs/configfs/configfs_internal.h | 4 +-
fs/configfs/inode.c | 6 +-
fs/dcache.c | 269 +++++++++++++--------------
fs/dcookies.c | 8 +-
fs/exec.c | 4 +-
fs/exportfs/expfs.c | 12 +-
fs/fat/inode.c | 4 +-
fs/fat/namei_vfat.c | 4 +-
fs/fhandle.c | 4 +-
fs/fs-writeback.c | 4 +-
fs/fs_struct.c | 46 ++---
fs/fuse/inode.c | 4 +-
fs/gfs2/export.c | 4 +-
fs/isofs/export.c | 4 +-
fs/libfs.c | 36 ++--
fs/namei.c | 56 +++---
fs/namespace.c | 8 +-
fs/ncpfs/dir.c | 6 +-
fs/ncpfs/ncplib_kernel.h | 8 +-
fs/nfs/dir.c | 6 +-
fs/nfs/getroot.c | 12 +-
fs/nfs/namespace.c | 16 +-
fs/nfs/unlink.c | 20 +-
fs/nilfs2/namei.c | 4 +-
fs/notify/fsnotify.c | 8 +-
fs/notify/vfsmount_mark.c | 24 ++--
fs/ocfs2/dcache.c | 6 +-
fs/ocfs2/export.c | 4 +-
fs/reiserfs/inode.c | 4 +-
fs/udf/namei.c | 4 +-
fs/xfs/linux-2.6/xfs_export.c | 8 +-
include/linux/dcache.h | 15 +-
include/linux/fs.h | 6 +-
include/linux/fs_struct.h | 16 +-
include/linux/fsnotify_backend.h | 6 +-
include/linux/lglock.h | 35 ++++-
include/linux/seccomp.h | 10 +
include/linux/seqlock.h | 142 +++++++++------
include/linux/u64_stats_sync.h | 2 +
include/net/neighbour.h | 2 +-
kernel/cgroup.c | 22 +-
kernel/cpu.c | 35 +++-
kernel/fork.c | 10 +-
kernel/rtmutex.c | 6 +-
kernel/sched.c | 6 +-
kernel/time/jiffies.c | 4 +-
kernel/time/ntp.c | 24 ++-
kernel/time/tick-common.c | 10 +-
kernel/time/tick-internal.h | 3 +-
kernel/time/tick-sched.c | 16 +-
kernel/time/timekeeping.c | 89 +++++----
kernel/timer.c | 16 +-
kernel/trace/ring_buffer.c | 2 +-
localversion-rt | 2 +-
net/sunrpc/rpc_pipe.c | 6 +-
security/selinux/selinuxfs.c | 14 +-
88 files changed, 919 insertions(+), 810 deletions(-)
---------------------------
diff --git a/arch/ia64/kernel/asm-offsets.c b/arch/ia64/kernel/asm-offsets.c
index af56501..106aeb6 100644
--- a/arch/ia64/kernel/asm-offsets.c
+++ b/arch/ia64/kernel/asm-offsets.c
@@ -269,8 +269,8 @@ void foo(void)
BLANK();
/* used by fsys_gettimeofday in arch/ia64/kernel/fsys.S */
- DEFINE(IA64_GTOD_LOCK_OFFSET,
- offsetof (struct fsyscall_gtod_data_t, lock));
+ DEFINE(IA64_GTOD_SEQ_OFFSET,
+ offsetof (struct fsyscall_gtod_data_t, seq);
DEFINE(IA64_GTOD_WALL_TIME_OFFSET,
offsetof (struct fsyscall_gtod_data_t, wall_time));
DEFINE(IA64_GTOD_MONO_TIME_OFFSET,
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 331d42b..fa77de7 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -174,7 +174,7 @@ ENTRY(fsys_set_tid_address)
FSYS_RETURN
END(fsys_set_tid_address)
-#if IA64_GTOD_LOCK_OFFSET !=0
+#if IA64_GTOD_SEQ_OFFSET !=0
#error fsys_gettimeofday incompatible with changes to struct fsyscall_gtod_data_t
#endif
#if IA64_ITC_JITTER_OFFSET !=0
diff --git a/arch/ia64/kernel/fsyscall_gtod_data.h b/arch/ia64/kernel/fsyscall_gtod_data.h
index 57d2ee6..146b15b 100644
--- a/arch/ia64/kernel/fsyscall_gtod_data.h
+++ b/arch/ia64/kernel/fsyscall_gtod_data.h
@@ -6,7 +6,7 @@
*/
struct fsyscall_gtod_data_t {
- seqlock_t lock;
+ seqcount_t seq;
struct timespec wall_time;
struct timespec monotonic_time;
cycle_t clk_mask;
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 604a636..15823ed 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -35,9 +35,7 @@
static cycle_t itc_get_cycles(struct clocksource *cs);
-struct fsyscall_gtod_data_t fsyscall_gtod_data = {
- .lock = __RAW_SEQLOCK_UNLOCKED(fsyscall_gtod_data.lock),
-};
+struct fsyscall_gtod_data_t fsyscall_gtod_data;
struct itc_jitter_data_t itc_jitter_data;
@@ -460,9 +458,7 @@ void update_vsyscall_tz(void)
void update_vsyscall(struct timespec *wall, struct timespec *wtm,
struct clocksource *c, u32 mult)
{
- unsigned long flags;
-
- raw_write_seqlock_irqsave(&fsyscall_gtod_data.lock, flags);
+ write_seqcount_begin(&fsyscall_gtod_data.seq);
/* copy fsyscall clock data */
fsyscall_gtod_data.clk_mask = c->mask;
@@ -485,6 +481,6 @@ void update_vsyscall(struct timespec *wall, struct timespec *wtm,
fsyscall_gtod_data.monotonic_time.tv_sec++;
}
- raw_write_sequnlock_irqrestore(&fsyscall_gtod_data.lock, flags);
+ write_seqcount_end(&fsyscall_gtod_data.seq);
}
diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 856e9c3..1baf322 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -165,18 +165,18 @@ static void spufs_prune_dir(struct dentry *dir)
mutex_lock(&dir->d_inode->i_mutex);
list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!(d_unhashed(dentry)) && dentry->d_inode) {
dget_dlock(dentry);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
simple_unlink(dir->d_inode, dentry);
/* XXX: what was dcache_lock protecting here? Other
* filesystems (IB, configfs) release dcache_lock
* before unlink */
dput(dentry);
} else {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
}
shrink_dcache_parent(dir);
diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h
index 6e976ee..a563c50 100644
--- a/arch/x86/include/asm/irq_vectors.h
+++ b/arch/x86/include/asm/irq_vectors.h
@@ -17,7 +17,8 @@
* Vectors 0 ... 31 : system traps and exceptions - hardcoded events
* Vectors 32 ... 127 : device interrupts
* Vector 128 : legacy int80 syscall interface
- * Vectors 129 ... INVALIDATE_TLB_VECTOR_START-1 : device interrupts
+ * Vector 204 : legacy x86_64 vsyscall emulation
+ * Vectors 129 ... INVALIDATE_TLB_VECTOR_START-1 except 204 : device interrupts
* Vectors INVALIDATE_TLB_VECTOR_START ... 255 : special interrupts
*
* 64-bit x86 has per CPU IDT tables, 32-bit has one shared IDT table.
@@ -50,6 +51,9 @@
#ifdef CONFIG_X86_32
# define SYSCALL_VECTOR 0x80
#endif
+#ifdef CONFIG_X86_64
+# define VSYSCALL_EMU_VECTOR 0xcc
+#endif
/*
* Vectors 0x30-0x3f are used for ISA interrupts.
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 0310da6..2bae0a5 100644
--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -1,6 +1,8 @@
#ifndef _ASM_X86_TRAPS_H
#define _ASM_X86_TRAPS_H
+#include <linux/kprobes.h>
+
#include <asm/debugreg.h>
#include <asm/siginfo.h> /* TRAP_TRACE, ... */
@@ -38,6 +40,7 @@ asmlinkage void alignment_check(void);
asmlinkage void machine_check(void);
#endif /* CONFIG_X86_MCE */
asmlinkage void simd_coprocessor_error(void);
+asmlinkage void emulate_vsyscall(void);
dotraplinkage void do_divide_error(struct pt_regs *, long);
dotraplinkage void do_debug(struct pt_regs *, long);
@@ -64,6 +67,7 @@ dotraplinkage void do_alignment_check(struct pt_regs *, long);
dotraplinkage void do_machine_check(struct pt_regs *, long);
#endif
dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
+dotraplinkage void do_emulate_vsyscall(struct pt_regs *, long);
#ifdef CONFIG_X86_32
dotraplinkage void do_iret_error(struct pt_regs *, long);
#endif
diff --git a/arch/x86/include/asm/vgtod.h b/arch/x86/include/asm/vgtod.h
index 4f72846..10e09fc 100644
--- a/arch/x86/include/asm/vgtod.h
+++ b/arch/x86/include/asm/vgtod.h
@@ -5,7 +5,7 @@
#include <linux/clocksource.h>
struct vsyscall_gtod_data {
- raw_seqlock_t lock;
+ seqcount_t seq;
/* open coded 'struct timespec' */
time_t wall_time_sec;
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h
index d555973..bb710cb 100644
--- a/arch/x86/include/asm/vsyscall.h
+++ b/arch/x86/include/asm/vsyscall.h
@@ -31,6 +31,18 @@ extern struct timezone sys_tz;
extern void map_vsyscall(void);
+/* Emulation */
+
+static inline bool is_vsyscall_entry(unsigned long addr)
+{
+ return (addr & ~0xC00UL) == VSYSCALL_START;
+}
+
+static inline int vsyscall_entry_nr(unsigned long addr)
+{
+ return (addr & 0xC00UL) >> 10;
+}
+
#endif /* __KERNEL__ */
#endif /* _ASM_X86_VSYSCALL_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 90b06d4..cc0469a 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -44,6 +44,7 @@ obj-y += probe_roms.o
obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o
obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o
obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o vread_tsc_64.o
+obj-$(CONFIG_X86_64) += vsyscall_emu_64.o
obj-y += bootflag.o e820.o
obj-y += pci-dma.o quirks.o topology.o kdebugfs.o
obj-y += alternative.o i8253.o pci-nommu.o hw_breakpoint.o
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 1689be7..eb7fa5c 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1121,6 +1121,8 @@ zeroentry spurious_interrupt_bug do_spurious_interrupt_bug
zeroentry coprocessor_error do_coprocessor_error
errorentry alignment_check do_alignment_check
zeroentry simd_coprocessor_error do_simd_coprocessor_error
+zeroentry emulate_vsyscall do_emulate_vsyscall
+
/* Reload gs selector with exception handling */
/* edi: new selector */
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index d343009..25c0dd4 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -895,6 +895,12 @@ void __init trap_init(void)
set_bit(SYSCALL_VECTOR, used_vectors);
#endif
+#ifdef CONFIG_X86_64
+ BUG_ON(test_bit(VSYSCALL_EMU_VECTOR, used_vectors));
+ set_system_intr_gate(VSYSCALL_EMU_VECTOR, &emulate_vsyscall);
+ set_bit(VSYSCALL_EMU_VECTOR, used_vectors);
+#endif
+
/*
* Should be a barrier for any external CPU state:
*/
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 89aed99..85d4a06 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -188,10 +188,6 @@ SECTIONS
*(.vsyscall_2)
}
- .vsyscall_3 ADDR(.vsyscall_0) + 3072: AT(VLOAD(.vsyscall_3)) {
- *(.vsyscall_3)
- }
-
#define __VVAR_KERNEL_LDS
#include <asm/vvar.h>
#undef __VVAR_KERNEL_LDS
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index bbcbaaa..c1fe684 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -2,6 +2,8 @@
* Copyright (C) 2001 Andrea Arcangeli <andrea@...e.de> SuSE
* Copyright 2003 Andi Kleen, SuSE Labs.
*
+ * [ NOTE: this mechanism is now deprecated in favor of the vDSO. ]
+ *
* Thanks to hpa@...nsmeta.com for some useful hint.
* Special thanks to Ingo Molnar for his early experience with
* a different vsyscall implementation for Linux/IA32 and for the name.
@@ -11,10 +13,9 @@
* vsyscalls. One vsyscall can reserve more than 1 slot to avoid
* jumping out of line if necessary. We cannot add more with this
* mechanism because older kernels won't return -ENOSYS.
- * If we want more than four we need a vDSO.
*
- * Note: the concept clashes with user mode linux. If you use UML and
- * want per guest time just set the kernel.vsyscall64 sysctl to 0.
+ * Note: the concept clashes with user mode linux. UML users should
+ * use the vDSO.
*/
/* Disable profiling for userspace code: */
@@ -32,6 +33,8 @@
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/notifier.h>
+#include <linux/syscalls.h>
+#include <linux/ratelimit.h>
#include <asm/vsyscall.h>
#include <asm/pgtable.h>
@@ -44,187 +47,138 @@
#include <asm/desc.h>
#include <asm/topology.h>
#include <asm/vgtod.h>
-
-#define __vsyscall(nr) \
- __attribute__ ((unused, __section__(".vsyscall_" #nr))) notrace
-#define __syscall_clobber "r11","cx","memory"
+#include <asm/traps.h>
DEFINE_VVAR(int, vgetcpu_mode);
-DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data) =
-{
- .lock = __RAW_SEQLOCK_UNLOCKED(__vsyscall_gtod_data.lock),
- .sysctl_enabled = 1,
-};
+DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data);
void update_vsyscall_tz(void)
{
- unsigned long flags;
-
- raw_write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
- /* sys_tz has changed */
vsyscall_gtod_data.sys_tz = sys_tz;
- raw_write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
}
void update_vsyscall(struct timespec *wall_time, struct timespec *wtm,
struct clocksource *clock, u32 mult)
{
- unsigned long flags;
+ write_seqcount_begin(&vsyscall_gtod_data.seq);
+
- raw_write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags);
/* copy vsyscall data */
- vsyscall_gtod_data.clock.vread = clock->vread;
- vsyscall_gtod_data.clock.cycle_last = clock->cycle_last;
- vsyscall_gtod_data.clock.mask = clock->mask;
- vsyscall_gtod_data.clock.mult = mult;
- vsyscall_gtod_data.clock.shift = clock->shift;
- vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
- vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
- vsyscall_gtod_data.wall_to_monotonic = *wtm;
- vsyscall_gtod_data.wall_time_coarse = __current_kernel_time();
- raw_write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags);
+ vsyscall_gtod_data.clock.vread = clock->vread;
+ vsyscall_gtod_data.clock.cycle_last = clock->cycle_last;
+ vsyscall_gtod_data.clock.mask = clock->mask;
+ vsyscall_gtod_data.clock.mult = mult;
+ vsyscall_gtod_data.clock.shift = clock->shift;
+ vsyscall_gtod_data.wall_time_sec = wall_time->tv_sec;
+ vsyscall_gtod_data.wall_time_nsec = wall_time->tv_nsec;
+ vsyscall_gtod_data.wall_to_monotonic = *wtm;
+ vsyscall_gtod_data.wall_time_coarse = __current_kernel_time();
+
+ write_seqcount_end(&vsyscall_gtod_data.seq);
}
-/* RED-PEN may want to readd seq locking, but then the variable should be
- * write-once.
- */
-static __always_inline void do_get_tz(struct timezone * tz)
+static void warn_bad_vsyscall(const char *level, struct pt_regs *regs,
+ const char *message)
{
- *tz = VVAR(vsyscall_gtod_data).sys_tz;
-}
+ static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);
+ struct task_struct *tsk;
-static __always_inline int gettimeofday(struct timeval *tv, struct timezone *tz)
-{
- int ret;
- asm volatile("syscall"
- : "=a" (ret)
- : "0" (__NR_gettimeofday),"D" (tv),"S" (tz)
- : __syscall_clobber );
- return ret;
-}
+ if (!show_unhandled_signals || !__ratelimit(&rs))
+ return;
-static __always_inline long time_syscall(long *t)
-{
- long secs;
- asm volatile("syscall"
- : "=a" (secs)
- : "0" (__NR_time),"D" (t) : __syscall_clobber);
- return secs;
-}
+ tsk = current;
-static __always_inline void do_vgettimeofday(struct timeval * tv)
-{
- cycle_t now, base, mask, cycle_delta;
- unsigned seq;
- unsigned long mult, shift, nsec;
- cycle_t (*vread)(void);
- do {
- seq = read_seqbegin(&VVAR(vsyscall_gtod_data).lock);
-
- vread = VVAR(vsyscall_gtod_data).clock.vread;
- if (unlikely(!VVAR(vsyscall_gtod_data).sysctl_enabled ||
- !vread)) {
- gettimeofday(tv,NULL);
- return;
- }
-
- now = vread();
- base = VVAR(vsyscall_gtod_data).clock.cycle_last;
- mask = VVAR(vsyscall_gtod_data).clock.mask;
- mult = VVAR(vsyscall_gtod_data).clock.mult;
- shift = VVAR(vsyscall_gtod_data).clock.shift;
-
- tv->tv_sec = VVAR(vsyscall_gtod_data).wall_time_sec;
- nsec = VVAR(vsyscall_gtod_data).wall_time_nsec;
- } while (read_seqretry(&VVAR(vsyscall_gtod_data).lock, seq));
-
- /* calculate interval: */
- cycle_delta = (now - base) & mask;
- /* convert to nsecs: */
- nsec += (cycle_delta * mult) >> shift;
-
- while (nsec >= NSEC_PER_SEC) {
- tv->tv_sec += 1;
- nsec -= NSEC_PER_SEC;
- }
- tv->tv_usec = nsec / NSEC_PER_USEC;
+ printk("%s%s[%d] %s ip:%lx sp:%lx ax:%lx si:%lx di:%lx\n",
+ level, tsk->comm, task_pid_nr(tsk),
+ message, regs->ip - 2, regs->sp, regs->ax, regs->si, regs->di);
}
-int __vsyscall(0) vgettimeofday(struct timeval * tv, struct timezone * tz)
+void dotraplinkage do_emulate_vsyscall(struct pt_regs *regs, long error_code)
{
- if (tv)
- do_vgettimeofday(tv);
- if (tz)
- do_get_tz(tz);
- return 0;
-}
-
-/* This will break when the xtime seconds get inaccurate, but that is
- * unlikely */
-time_t __vsyscall(1) vtime(time_t *t)
-{
- unsigned seq;
- time_t result;
- if (unlikely(!VVAR(vsyscall_gtod_data).sysctl_enabled))
- return time_syscall(t);
+ const char *vsyscall_name;
+ struct task_struct *tsk;
+ unsigned long caller;
+ int vsyscall_nr;
+ long ret;
+
+ /* Kernel code must never get here. */
+ BUG_ON(!user_mode(regs));
+
+ local_irq_enable();
+
+ /*
+ * x86-ism here: regs->ip points to the instruction after the int 0xcc,
+ * and int 0xcc is two bytes long.
+ */
+ if (!is_vsyscall_entry(regs->ip - 2)) {
+ warn_bad_vsyscall(KERN_WARNING, regs, "illegal int 0xcc (exploit attempt?)");
+ goto sigsegv;
+ }
+ vsyscall_nr = vsyscall_entry_nr(regs->ip - 2);
- do {
- seq = read_seqbegin(&VVAR(vsyscall_gtod_data).lock);
+ if (get_user(caller, (unsigned long __user *)regs->sp) != 0) {
+ warn_bad_vsyscall(KERN_WARNING, regs, "int 0xcc with bad stack (exploit attempt?)");
+ goto sigsegv;
+ }
- result = VVAR(vsyscall_gtod_data).wall_time_sec;
+ tsk = current;
+ if (seccomp_mode(&tsk->seccomp))
+ do_exit(SIGKILL);
+
+ switch (vsyscall_nr) {
+ case 0:
+ vsyscall_name = "gettimeofday";
+ ret = sys_gettimeofday(
+ (struct timeval __user *)regs->di,
+ (struct timezone __user *)regs->si);
+ break;
+
+ case 1:
+ vsyscall_name = "time";
+ ret = sys_time((time_t __user *)regs->di);
+ break;
+
+ case 2:
+ vsyscall_name = "getcpu";
+ ret = sys_getcpu((unsigned __user *)regs->di,
+ (unsigned __user *)regs->si,
+ 0);
+ break;
+
+ default:
+ /*
+ * If we get here, then vsyscall_nr indicates that int 0xcc
+ * happened at an address in the vsyscall page that doesn't
+ * contain int 0xcc. That can't happen.
+ */
+ BUG();
+ }
- } while (read_seqretry(&VVAR(vsyscall_gtod_data).lock, seq));
+ if (ret == -EFAULT) {
+ /*
+ * Bad news -- userspace fed a bad pointer to a vsyscall.
+ *
+ * With a real vsyscall, that would have caused SIGSEGV.
+ * To make writing reliable exploits using the emulated
+ * vsyscalls harder, generate SIGSEGV here as well.
+ */
+ warn_bad_vsyscall(KERN_INFO, regs,
+ "vsyscall fault (exploit attempt?)");
+ goto sigsegv;
+ }
- if (t)
- *t = result;
- return result;
-}
+ regs->ax = ret;
-/* Fast way to get current CPU and node.
- This helps to do per node and per CPU caches in user space.
- The result is not guaranteed without CPU affinity, but usually
- works out because the scheduler tries to keep a thread on the same
- CPU.
+ /* Emulate a ret instruction. */
+ regs->ip = caller;
+ regs->sp += 8;
- tcache must point to a two element sized long array.
- All arguments can be NULL. */
-long __vsyscall(2)
-vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
-{
- unsigned int p;
- unsigned long j = 0;
-
- /* Fast cache - only recompute value once per jiffies and avoid
- relatively costly rdtscp/cpuid otherwise.
- This works because the scheduler usually keeps the process
- on the same CPU and this syscall doesn't guarantee its
- results anyways.
- We do this here because otherwise user space would do it on
- its own in a likely inferior way (no access to jiffies).
- If you don't like it pass NULL. */
- if (tcache && tcache->blob[0] == (j = VVAR(jiffies))) {
- p = tcache->blob[1];
- } else if (VVAR(vgetcpu_mode) == VGETCPU_RDTSCP) {
- /* Load per CPU data from RDTSCP */
- native_read_tscp(&p);
- } else {
- /* Load per CPU data from GDT */
- asm("lsl %1,%0" : "=r" (p) : "r" (__PER_CPU_SEG));
- }
- if (tcache) {
- tcache->blob[0] = j;
- tcache->blob[1] = p;
- }
- if (cpu)
- *cpu = p & 0xfff;
- if (node)
- *node = p >> 12;
- return 0;
-}
+ local_irq_disable();
+ return;
-static long __vsyscall(3) venosys_1(void)
-{
- return -ENOSYS;
+sigsegv:
+ regs->ip -= 2; /* The faulting instruction should be the int 0xcc. */
+ force_sig(SIGSEGV, current);
}
#ifdef CONFIG_SYSCTL
@@ -243,8 +197,10 @@ static ctl_table kernel_root_table2[] = {
};
#endif
-/* Assume __initcall executes before all user space. Hopefully kmod
- doesn't violate that. We'll find out if it does. */
+/*
+ * Assume __initcall executes before all user space. Hopefully kmod
+ * doesn't violate that. We'll find out if it does.
+ */
static void __cpuinit vsyscall_set_cpu(int cpu)
{
unsigned long d;
@@ -255,13 +211,15 @@ static void __cpuinit vsyscall_set_cpu(int cpu)
if (cpu_has(&cpu_data(cpu), X86_FEATURE_RDTSCP))
write_rdtscp_aux((node << 12) | cpu);
- /* Store cpu number in limit so that it can be loaded quickly
- in user space in vgetcpu.
- 12 bits for the CPU and 8 bits for the node. */
+ /*
+ * Store cpu number in limit so that it can be loaded quickly
+ * in user space in vgetcpu. (12 bits for the CPU and 8 bits for the node)
+ */
d = 0x0f40000000000ULL;
d |= cpu;
d |= (node & 0xf) << 12;
d |= (node >> 4) << 48;
+
write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
}
@@ -275,8 +233,10 @@ static int __cpuinit
cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
{
long cpu = (long)arg;
+
if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 1);
+
return NOTIFY_DONE;
}
@@ -291,18 +251,15 @@ void __init map_vsyscall(void)
static int __init vsyscall_init(void)
{
- BUG_ON(((unsigned long) &vgettimeofday !=
- VSYSCALL_ADDR(__NR_vgettimeofday)));
- BUG_ON((unsigned long) &vtime != VSYSCALL_ADDR(__NR_vtime));
- BUG_ON((VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE)));
- BUG_ON((unsigned long) &vgetcpu != VSYSCALL_ADDR(__NR_vgetcpu));
+ BUG_ON(VSYSCALL_ADDR(0) != __fix_to_virt(VSYSCALL_FIRST_PAGE));
+
#ifdef CONFIG_SYSCTL
register_sysctl_table(kernel_root_table2);
#endif
on_each_cpu(cpu_vsyscall_init, NULL, 1);
/* notifier priority > KVM */
hotcpu_notifier(cpu_vsyscall_notifier, 30);
+
return 0;
}
-
__initcall(vsyscall_init);
diff --git a/arch/x86/kernel/vsyscall_emu_64.S b/arch/x86/kernel/vsyscall_emu_64.S
new file mode 100644
index 0000000..ffa845e
--- /dev/null
+++ b/arch/x86/kernel/vsyscall_emu_64.S
@@ -0,0 +1,27 @@
+/*
+ * vsyscall_emu_64.S: Vsyscall emulation page
+ *
+ * Copyright (c) 2011 Andy Lutomirski
+ *
+ * Subject to the GNU General Public License, version 2
+ */
+
+#include <linux/linkage.h>
+#include <asm/irq_vectors.h>
+
+/* The unused parts of the page are filled with 0xcc by the linker script. */
+
+.section .vsyscall_0, "a"
+ENTRY(vsyscall_0)
+ int $VSYSCALL_EMU_VECTOR
+END(vsyscall_0)
+
+.section .vsyscall_1, "a"
+ENTRY(vsyscall_1)
+ int $VSYSCALL_EMU_VECTOR
+END(vsyscall_1)
+
+.section .vsyscall_2, "a"
+ENTRY(vsyscall_2)
+ int $VSYSCALL_EMU_VECTOR
+END(vsyscall_2)
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index a724905..117e6cf 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -46,11 +46,11 @@ notrace static noinline int do_realtime(struct timespec *ts)
{
unsigned long seq, ns;
do {
- seq = read_seqbegin(>od->lock);
+ seq = read_seqcount_begin(>od->seq);
ts->tv_sec = gtod->wall_time_sec;
ts->tv_nsec = gtod->wall_time_nsec;
ns = vgetns();
- } while (unlikely(read_seqretry(>od->lock, seq)));
+ } while (unlikely(read_seqcount_retry(>od->seq, seq)));
timespec_add_ns(ts, ns);
return 0;
}
@@ -59,12 +59,12 @@ notrace static noinline int do_monotonic(struct timespec *ts)
{
unsigned long seq, ns, secs;
do {
- seq = read_seqbegin(>od->lock);
+ seq = read_seqcount_begin(>od->seq);
secs = gtod->wall_time_sec;
ns = gtod->wall_time_nsec + vgetns();
secs += gtod->wall_to_monotonic.tv_sec;
ns += gtod->wall_to_monotonic.tv_nsec;
- } while (unlikely(read_seqretry(>od->lock, seq)));
+ } while (unlikely(read_seqcount_retry(>od->seq, seq)));
/* wall_time_nsec, vgetns(), and wall_to_monotonic.tv_nsec
* are all guaranteed to be nonnegative.
@@ -83,10 +83,10 @@ notrace static noinline int do_realtime_coarse(struct timespec *ts)
{
unsigned long seq;
do {
- seq = read_seqbegin(>od->lock);
+ seq = read_seqcount_begin(>od->seq);
ts->tv_sec = gtod->wall_time_coarse.tv_sec;
ts->tv_nsec = gtod->wall_time_coarse.tv_nsec;
- } while (unlikely(read_seqretry(>od->lock, seq)));
+ } while (unlikely(read_seqcount_retry(>od->seq, seq)));
return 0;
}
@@ -94,12 +94,12 @@ notrace static noinline int do_monotonic_coarse(struct timespec *ts)
{
unsigned long seq, ns, secs;
do {
- seq = read_seqbegin(>od->lock);
+ seq = read_seqcount_begin(>od->seq);
secs = gtod->wall_time_coarse.tv_sec;
ns = gtod->wall_time_coarse.tv_nsec;
secs += gtod->wall_to_monotonic.tv_sec;
ns += gtod->wall_to_monotonic.tv_nsec;
- } while (unlikely(read_seqretry(>od->lock, seq)));
+ } while (unlikely(read_seqcount_retry(>od->seq, seq)));
/* wall_time_nsec and wall_to_monotonic.tv_nsec are
* guaranteed to be between 0 and NSEC_PER_SEC.
diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c
index 31ae1b1..21319f7 100644
--- a/drivers/infiniband/hw/ipath/ipath_fs.c
+++ b/drivers/infiniband/hw/ipath/ipath_fs.c
@@ -277,14 +277,14 @@ static int remove_file(struct dentry *parent, char *name)
goto bail;
}
- spin_lock(&tmp->d_lock);
+ seq_spin_lock(&tmp->d_lock);
if (!(d_unhashed(tmp) && tmp->d_inode)) {
dget_dlock(tmp);
__d_drop(tmp);
- spin_unlock(&tmp->d_lock);
+ seq_spin_unlock(&tmp->d_lock);
simple_unlink(parent->d_inode, tmp);
} else
- spin_unlock(&tmp->d_lock);
+ seq_spin_unlock(&tmp->d_lock);
ret = 0;
bail:
diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c
index df7fa25..b20c7f8 100644
--- a/drivers/infiniband/hw/qib/qib_fs.c
+++ b/drivers/infiniband/hw/qib/qib_fs.c
@@ -453,14 +453,14 @@ static int remove_file(struct dentry *parent, char *name)
goto bail;
}
- spin_lock(&tmp->d_lock);
+ seq_spin_lock(&tmp->d_lock);
if (!(d_unhashed(tmp) && tmp->d_inode)) {
dget_dlock(tmp);
__d_drop(tmp);
- spin_unlock(&tmp->d_lock);
+ seq_spin_unlock(&tmp->d_lock);
simple_unlink(parent->d_inode, tmp);
} else {
- spin_unlock(&tmp->d_lock);
+ seq_spin_unlock(&tmp->d_lock);
}
ret = 0;
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 2278dad..731f03f 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -343,19 +343,19 @@ static int usbfs_empty (struct dentry *dentry)
{
struct list_head *list;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
list_for_each(list, &dentry->d_subdirs) {
struct dentry *de = list_entry(list, struct dentry, d_u.d_child);
- spin_lock_nested(&de->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&de->d_lock, DENTRY_D_LOCK_NESTED);
if (usbfs_positive(de)) {
- spin_unlock(&de->d_lock);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&de->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return 0;
}
- spin_unlock(&de->d_lock);
+ seq_spin_unlock(&de->d_lock);
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return 1;
}
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 9c2bdda..0ca9433 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -107,7 +107,7 @@ static int v9fs_alloc_rdir_buf(struct file *filp, int buflen)
err = -ENOMEM;
goto exit;
}
- spin_lock(&filp->f_dentry->d_lock);
+ seq_spin_lock(&filp->f_dentry->d_lock);
if (!fid->rdir) {
rdir->buf = (uint8_t *)rdir + sizeof(struct p9_rdir);
mutex_init(&rdir->mutex);
@@ -115,7 +115,7 @@ static int v9fs_alloc_rdir_buf(struct file *filp, int buflen)
fid->rdir = (void *) rdir;
rdir = NULL;
}
- spin_unlock(&filp->f_dentry->d_lock);
+ seq_spin_unlock(&filp->f_dentry->d_lock);
kfree(rdir);
}
exit:
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 1b0b195..84f6bf6 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -705,9 +705,9 @@ out_skip:
/* the dirent, if it exists, now points to a different vnode */
not_found:
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_flags |= DCACHE_NFSFS_RENAMED;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
out_bad:
if (dentry->d_inode) {
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 475f9c5..b620114 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -207,9 +207,9 @@ static inline void __managed_dentry_set_automount(struct dentry *dentry)
static inline void managed_dentry_set_automount(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_set_automount(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
static inline void __managed_dentry_clear_automount(struct dentry *dentry)
@@ -219,9 +219,9 @@ static inline void __managed_dentry_clear_automount(struct dentry *dentry)
static inline void managed_dentry_clear_automount(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_clear_automount(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
static inline void __managed_dentry_set_transit(struct dentry *dentry)
@@ -231,9 +231,9 @@ static inline void __managed_dentry_set_transit(struct dentry *dentry)
static inline void managed_dentry_set_transit(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_set_transit(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
static inline void __managed_dentry_clear_transit(struct dentry *dentry)
@@ -243,9 +243,9 @@ static inline void __managed_dentry_clear_transit(struct dentry *dentry)
static inline void managed_dentry_clear_transit(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_clear_transit(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
static inline void __managed_dentry_set_managed(struct dentry *dentry)
@@ -255,9 +255,9 @@ static inline void __managed_dentry_set_managed(struct dentry *dentry)
static inline void managed_dentry_set_managed(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_set_managed(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
static inline void __managed_dentry_clear_managed(struct dentry *dentry)
@@ -267,9 +267,9 @@ static inline void __managed_dentry_clear_managed(struct dentry *dentry)
static inline void managed_dentry_clear_managed(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__managed_dentry_clear_managed(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/* Initializing function */
diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index 450f529..d8b6184 100644
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -99,7 +99,7 @@ static struct dentry *get_next_positive_subdir(struct dentry *prev,
spin_lock(&sbi->lookup_lock);
if (prev == NULL) {
- spin_lock(&root->d_lock);
+ seq_spin_lock(&root->d_lock);
prev = dget_dlock(root);
next = prev->d_subdirs.next;
p = prev;
@@ -107,12 +107,12 @@ static struct dentry *get_next_positive_subdir(struct dentry *prev,
}
p = prev;
- spin_lock(&p->d_lock);
+ seq_spin_lock(&p->d_lock);
again:
next = p->d_u.d_child.next;
start:
if (next == &root->d_subdirs) {
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&p->d_lock);
spin_unlock(&sbi->lookup_lock);
dput(prev);
return NULL;
@@ -120,16 +120,16 @@ start:
q = list_entry(next, struct dentry, d_u.d_child);
- spin_lock_nested(&q->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&q->d_lock, DENTRY_D_LOCK_NESTED);
/* Negative dentry - try next */
if (!simple_positive(q)) {
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&p->d_lock);
p = q;
goto again;
}
dget_dlock(q);
- spin_unlock(&q->d_lock);
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&q->d_lock);
+ seq_spin_unlock(&p->d_lock);
spin_unlock(&sbi->lookup_lock);
dput(prev);
@@ -153,7 +153,7 @@ static struct dentry *get_next_positive_dentry(struct dentry *prev,
spin_lock(&sbi->lookup_lock);
relock:
p = prev;
- spin_lock(&p->d_lock);
+ seq_spin_lock(&p->d_lock);
again:
next = p->d_subdirs.next;
if (next == &p->d_subdirs) {
@@ -161,19 +161,19 @@ again:
struct dentry *parent;
if (p == root) {
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&p->d_lock);
spin_unlock(&sbi->lookup_lock);
dput(prev);
return NULL;
}
parent = p->d_parent;
- if (!spin_trylock(&parent->d_lock)) {
- spin_unlock(&p->d_lock);
+ if (!seq_spin_trylock(&parent->d_lock)) {
+ seq_spin_unlock(&p->d_lock);
cpu_relax();
goto relock;
}
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&p->d_lock);
next = p->d_u.d_child.next;
p = parent;
if (next != &parent->d_subdirs)
@@ -182,16 +182,16 @@ again:
}
ret = list_entry(next, struct dentry, d_u.d_child);
- spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED);
/* Negative dentry - try next */
if (!simple_positive(ret)) {
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&p->d_lock);
p = ret;
goto again;
}
dget_dlock(ret);
- spin_unlock(&ret->d_lock);
- spin_unlock(&p->d_lock);
+ seq_spin_unlock(&ret->d_lock);
+ seq_spin_unlock(&p->d_lock);
spin_unlock(&sbi->lookup_lock);
dput(prev);
@@ -462,11 +462,11 @@ found:
init_completion(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
spin_lock(&sbi->lookup_lock);
- spin_lock(&expired->d_parent->d_lock);
- spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&expired->d_parent->d_lock);
+ seq_spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED);
list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child);
- spin_unlock(&expired->d_lock);
- spin_unlock(&expired->d_parent->d_lock);
+ seq_spin_unlock(&expired->d_lock);
+ seq_spin_unlock(&expired->d_parent->d_lock);
spin_unlock(&sbi->lookup_lock);
return expired;
}
@@ -556,7 +556,7 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_EXPIRING;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!ret) {
if ((IS_ROOT(dentry) ||
(autofs_type_indirect(sbi->type) &&
@@ -564,7 +564,7 @@ int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
!(dentry->d_flags & DCACHE_NEED_AUTOMOUNT))
__managed_dentry_set_automount(dentry);
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
complete_all(&ino->expire_complete);
spin_unlock(&sbi->fs_lock);
dput(dentry);
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index f55ae23..4a52674 100644
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -124,13 +124,13 @@ static int autofs4_dir_open(struct inode *inode, struct file *file)
* it.
*/
spin_lock(&sbi->lookup_lock);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!d_mountpoint(dentry) && list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
return -ENOENT;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
out:
@@ -179,7 +179,7 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry)
ino = list_entry(p, struct autofs_info, active);
active = ino->dentry;
- spin_lock(&active->d_lock);
+ seq_spin_lock(&active->d_lock);
/* Already gone? */
if (active->d_count == 0)
@@ -199,12 +199,12 @@ static struct dentry *autofs4_lookup_active(struct dentry *dentry)
if (d_unhashed(active)) {
dget_dlock(active);
- spin_unlock(&active->d_lock);
+ seq_spin_unlock(&active->d_lock);
spin_unlock(&sbi->lookup_lock);
return active;
}
next:
- spin_unlock(&active->d_lock);
+ seq_spin_unlock(&active->d_lock);
}
spin_unlock(&sbi->lookup_lock);
@@ -231,7 +231,7 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
ino = list_entry(p, struct autofs_info, expiring);
expiring = ino->dentry;
- spin_lock(&expiring->d_lock);
+ seq_spin_lock(&expiring->d_lock);
/* Bad luck, we've already been dentry_iput */
if (!expiring->d_inode)
@@ -251,12 +251,12 @@ static struct dentry *autofs4_lookup_expiring(struct dentry *dentry)
if (d_unhashed(expiring)) {
dget_dlock(expiring);
- spin_unlock(&expiring->d_lock);
+ seq_spin_unlock(&expiring->d_lock);
spin_unlock(&sbi->lookup_lock);
return expiring;
}
next:
- spin_unlock(&expiring->d_lock);
+ seq_spin_unlock(&expiring->d_lock);
}
spin_unlock(&sbi->lookup_lock);
@@ -382,12 +382,12 @@ static struct vfsmount *autofs4_d_automount(struct path *path)
if (have_submounts(dentry))
goto done;
} else {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
goto done;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
ino->flags |= AUTOFS_INF_PENDING;
spin_unlock(&sbi->fs_lock);
@@ -410,12 +410,12 @@ done:
* an actual mount so ->d_automount() won't be called during
* the follow.
*/
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if ((!d_mountpoint(dentry) &&
!list_empty(&dentry->d_subdirs)) ||
(dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)))
__managed_dentry_clear_automount(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
spin_unlock(&sbi->fs_lock);
@@ -597,9 +597,9 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
spin_lock(&sbi->lookup_lock);
__autofs4_add_expiring(dentry);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
return 0;
@@ -670,15 +670,15 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
return -EACCES;
spin_lock(&sbi->lookup_lock);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
return -ENOTEMPTY;
}
__autofs4_add_expiring(dentry);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&sbi->lookup_lock);
if (sbi->version < 5)
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 1b8dc33..c473324 100644
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -40,14 +40,14 @@ static int btrfs_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
struct inode *parent;
u64 parent_root_id;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
fid->parent_objectid = BTRFS_I(parent)->location.objectid;
fid->parent_gen = parent->i_generation;
parent_root_id = BTRFS_I(parent)->root->objectid;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (parent_root_id != fid->root_objectid) {
fid->parent_root_objectid = parent_root_id;
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index f605753..2c2ac3a 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -3065,14 +3065,14 @@ int ceph_encode_dentry_release(void **p, struct dentry *dentry,
* doesn't have to be perfect; the mds will revoke anything we don't
* release.
*/
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (di->lease_session && di->lease_session->s_mds == mds)
force = 1;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
ret = ceph_encode_inode_release(p, dir, mds, drop, unless, force);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (ret && di->lease_session && di->lease_session->s_mds == mds) {
dout("encode_dentry_release %p mds%d seq %d\n",
dentry, mds, (int)di->lease_seq);
@@ -3082,6 +3082,6 @@ int ceph_encode_dentry_release(void **p, struct dentry *dentry,
rel->dname_seq = cpu_to_le32(di->lease_seq);
__ceph_mdsc_drop_dentry_lease(dentry);
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return ret;
}
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 0dba691..0ecffe2 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -82,13 +82,13 @@ static int mdsc_show(struct seq_file *s, void *p)
&pathbase, 0);
if (IS_ERR(path))
path = NULL;
- spin_lock(&req->r_dentry->d_lock);
+ seq_spin_lock(&req->r_dentry->d_lock);
seq_printf(s, " #%llx/%.*s (%s)",
ceph_ino(req->r_dentry->d_parent->d_inode),
req->r_dentry->d_name.len,
req->r_dentry->d_name.name,
path ? path : "");
- spin_unlock(&req->r_dentry->d_lock);
+ seq_spin_unlock(&req->r_dentry->d_lock);
kfree(path);
} else if (req->r_path1) {
seq_printf(s, " #%llx/%s", req->r_ino1.ino,
@@ -100,13 +100,13 @@ static int mdsc_show(struct seq_file *s, void *p)
&pathbase, 0);
if (IS_ERR(path))
path = NULL;
- spin_lock(&req->r_old_dentry->d_lock);
+ seq_spin_lock(&req->r_old_dentry->d_lock);
seq_printf(s, " #%llx/%.*s (%s)",
ceph_ino(req->r_old_dentry->d_parent->d_inode),
req->r_old_dentry->d_name.len,
req->r_old_dentry->d_name.name,
path ? path : "");
- spin_unlock(&req->r_old_dentry->d_lock);
+ seq_spin_unlock(&req->r_old_dentry->d_lock);
kfree(path);
} else if (req->r_path2) {
if (req->r_ino2.ino)
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index ef8f08c..f0f6efd 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -52,7 +52,7 @@ int ceph_init_dentry(struct dentry *dentry)
if (!di)
return -ENOMEM; /* oh well */
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_fsdata) {
/* lost a race */
kmem_cache_free(ceph_dentry_cachep, di);
@@ -64,7 +64,7 @@ int ceph_init_dentry(struct dentry *dentry)
dentry->d_time = jiffies;
ceph_dentry_lru_add(dentry);
out_unlock:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return 0;
}
@@ -112,7 +112,7 @@ static int __dcache_readdir(struct file *filp,
dout("__dcache_readdir %p at %llu (last %p)\n", dir, filp->f_pos,
last);
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
/* start at beginning? */
if (filp->f_pos == 2 || last == NULL ||
@@ -136,7 +136,7 @@ more:
fi->at_end = 1;
goto out_unlock;
}
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
if (!d_unhashed(dentry) && dentry->d_inode &&
ceph_snap(dentry->d_inode) != CEPH_SNAPDIR &&
ceph_ino(dentry->d_inode) != CEPH_INO_CEPH &&
@@ -146,15 +146,15 @@ more:
dentry->d_name.len, dentry->d_name.name, di->offset,
filp->f_pos, d_unhashed(dentry) ? " unhashed" : "",
!dentry->d_inode ? " null" : "");
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
p = p->prev;
dentry = list_entry(p, struct dentry, d_u.d_child);
di = ceph_dentry(dentry);
}
dget_dlock(dentry);
- spin_unlock(&dentry->d_lock);
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&parent->d_lock);
dout(" %llu (%llu) dentry %p %.*s %p\n", di->offset, filp->f_pos,
dentry, dentry->d_name.len, dentry->d_name.name, dentry->d_inode);
@@ -187,12 +187,12 @@ more:
goto out;
}
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
p = p->prev; /* advance to next dentry */
goto more;
out_unlock:
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
out:
if (last)
dput(last);
@@ -917,10 +917,10 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
*/
void ceph_invalidate_dentry_lease(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_time = jiffies;
ceph_dentry(dentry)->lease_shared_gen = 0;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
@@ -938,7 +938,7 @@ static int dentry_lease_is_valid(struct dentry *dentry)
struct inode *dir = NULL;
u32 seq = 0;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
di = ceph_dentry(dentry);
if (di && di->lease_session) {
s = di->lease_session;
@@ -962,7 +962,7 @@ static int dentry_lease_is_valid(struct dentry *dentry)
}
}
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (session) {
ceph_mdsc_lease_send_msg(session, dir, dentry,
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index d8858e9..11f11ed 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -804,7 +804,7 @@ static void update_dentry_lease(struct dentry *dentry,
if (dentry->d_op != &ceph_dentry_ops)
return;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dout("update_dentry_lease %p mask %d duration %lu ms ttl %lu\n",
dentry, le16_to_cpu(lease->mask), duration, ttl);
@@ -832,7 +832,7 @@ static void update_dentry_lease(struct dentry *dentry,
di->lease_renew_from = 0;
dentry->d_time = ttl;
out_unlock:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return;
}
@@ -858,13 +858,13 @@ static void ceph_set_dentry_offset(struct dentry *dn)
di->offset = ceph_inode(inode)->i_max_offset++;
spin_unlock(&inode->i_lock);
- spin_lock(&dir->d_lock);
- spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&dir->d_lock);
+ seq_spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
list_move(&dn->d_u.d_child, &dir->d_subdirs);
dout("set_dentry_offset %p %lld (%p %p)\n", dn, di->offset,
dn->d_u.d_child.prev, dn->d_u.d_child.next);
- spin_unlock(&dn->d_lock);
- spin_unlock(&dir->d_lock);
+ seq_spin_unlock(&dn->d_lock);
+ seq_spin_unlock(&dir->d_lock);
}
/*
@@ -1248,11 +1248,11 @@ retry_lookup:
goto retry_lookup;
} else {
/* reorder parent's d_subdirs */
- spin_lock(&parent->d_lock);
- spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&parent->d_lock);
+ seq_spin_lock_nested(&dn->d_lock, DENTRY_D_LOCK_NESTED);
list_move(&dn->d_u.d_child, &parent->d_subdirs);
- spin_unlock(&dn->d_lock);
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&dn->d_lock);
+ seq_spin_unlock(&parent->d_lock);
}
di = dn->d_fsdata;
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 0c1d917..da64709 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1476,7 +1476,7 @@ retry:
for (temp = dentry; !IS_ROOT(temp) && pos != 0; ) {
struct inode *inode;
- spin_lock(&temp->d_lock);
+ seq_spin_lock(&temp->d_lock);
inode = temp->d_inode;
if (inode && ceph_snap(inode) == CEPH_SNAPDIR) {
dout("build_path path+%d: %p SNAPDIR\n",
@@ -1487,13 +1487,13 @@ retry:
} else {
pos -= temp->d_name.len;
if (pos < 0) {
- spin_unlock(&temp->d_lock);
+ seq_spin_unlock(&temp->d_lock);
break;
}
strncpy(path + pos, temp->d_name.name,
temp->d_name.len);
}
- spin_unlock(&temp->d_lock);
+ seq_spin_unlock(&temp->d_lock);
if (pos)
path[--pos] = '/';
temp = temp->d_parent;
@@ -2758,7 +2758,7 @@ static void handle_lease(struct ceph_mds_client *mdsc,
if (!dentry)
goto release;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
di = ceph_dentry(dentry);
switch (h->action) {
case CEPH_MDS_LEASE_REVOKE:
@@ -2786,7 +2786,7 @@ static void handle_lease(struct ceph_mds_client *mdsc,
}
break;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
dput(dentry);
if (!release)
@@ -2861,7 +2861,7 @@ void ceph_mdsc_lease_release(struct ceph_mds_client *mdsc, struct inode *inode,
BUG_ON(mask == 0);
/* is dentry lease valid? */
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
di = ceph_dentry(dentry);
if (!di || !di->lease_session ||
di->lease_session->s_mds < 0 ||
@@ -2870,7 +2870,7 @@ void ceph_mdsc_lease_release(struct ceph_mds_client *mdsc, struct inode *inode,
dout("lease_release inode %p dentry %p -- "
"no lease on %d\n",
inode, dentry, mask);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return;
}
@@ -2878,7 +2878,7 @@ void ceph_mdsc_lease_release(struct ceph_mds_client *mdsc, struct inode *inode,
session = ceph_get_mds_session(di->lease_session);
seq = di->lease_seq;
__ceph_mdsc_drop_dentry_lease(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
dout("lease_release inode %p dentry %p mask %d to mds%d\n",
inode, dentry, mask, session->s_mds);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 16cdd6d..337abab 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -88,10 +88,10 @@ cifs_bp_rename_retry:
full_path[namelen] = 0; /* trailing null */
rcu_read_lock();
for (temp = direntry; !IS_ROOT(temp);) {
- spin_lock(&temp->d_lock);
+ seq_spin_lock(&temp->d_lock);
namelen -= 1 + temp->d_name.len;
if (namelen < 0) {
- spin_unlock(&temp->d_lock);
+ seq_spin_unlock(&temp->d_lock);
break;
} else {
full_path[namelen] = dirsep;
@@ -99,7 +99,7 @@ cifs_bp_rename_retry:
temp->d_name.len);
cFYI(0, "name: %s", full_path + namelen);
}
- spin_unlock(&temp->d_lock);
+ seq_spin_unlock(&temp->d_lock);
temp = temp->d_parent;
if (temp == NULL) {
cERROR(1, "corrupt dentry");
diff --git a/fs/coda/cache.c b/fs/coda/cache.c
index 6901578..93b5810 100644
--- a/fs/coda/cache.c
+++ b/fs/coda/cache.c
@@ -92,7 +92,7 @@ static void coda_flag_children(struct dentry *parent, int flag)
struct list_head *child;
struct dentry *de;
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
list_for_each(child, &parent->d_subdirs)
{
de = list_entry(child, struct dentry, d_u.d_child);
@@ -101,7 +101,7 @@ static void coda_flag_children(struct dentry *parent, int flag)
continue;
coda_flag_inode(de->d_inode, flag);
}
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
return;
}
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index 82bda8f..2ebef5e 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -121,7 +121,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
{
struct config_item * item = NULL;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry)) {
struct configfs_dirent * sd = dentry->d_fsdata;
if (sd->s_type & CONFIGFS_ITEM_LINK) {
@@ -130,7 +130,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
} else
item = config_item_get(sd->s_element);
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return item;
}
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index c83f476..84d7e95 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -250,14 +250,14 @@ void configfs_drop_dentry(struct configfs_dirent * sd, struct dentry * parent)
struct dentry * dentry = sd->s_dentry;
if (dentry) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!(d_unhashed(dentry) && dentry->d_inode)) {
dget_dlock(dentry);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
simple_unlink(parent->d_inode, dentry);
} else
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
}
diff --git a/fs/dcache.c b/fs/dcache.c
index f598b98..10580be 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -171,9 +171,9 @@ static void d_free(struct dentry *dentry)
*/
static inline void dentry_rcuwalk_barrier(struct dentry *dentry)
{
- assert_spin_locked(&dentry->d_lock);
+ assert_seq_spin_locked(&dentry->d_lock);
/* Go through a barrier */
- write_seqcount_barrier(&dentry->d_seq);
+ write_seqlock_barrier(&dentry->d_lock);
}
/*
@@ -189,7 +189,7 @@ static void dentry_iput(struct dentry * dentry)
if (inode) {
dentry->d_inode = NULL;
list_del_init(&dentry->d_alias);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
fsnotify_inoderemove(inode);
@@ -198,7 +198,7 @@ static void dentry_iput(struct dentry * dentry)
else
iput(inode);
} else {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
}
@@ -214,7 +214,7 @@ static void dentry_unlink_inode(struct dentry * dentry)
dentry->d_inode = NULL;
list_del_init(&dentry->d_alias);
dentry_rcuwalk_barrier(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
if (!inode->i_nlink)
fsnotify_inoderemove(inode);
@@ -292,7 +292,7 @@ static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent)
*/
dentry->d_flags |= DCACHE_DISCONNECTED;
if (parent)
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
dentry_iput(dentry);
/*
* dentry_iput drops the locks, at which point nobody (except
@@ -338,9 +338,9 @@ EXPORT_SYMBOL(__d_drop);
void d_drop(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
EXPORT_SYMBOL(d_drop);
@@ -359,7 +359,7 @@ static inline struct dentry *dentry_kill(struct dentry *dentry, int ref)
inode = dentry->d_inode;
if (inode && !spin_trylock(&inode->i_lock)) {
relock:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
cpu_relax();
return dentry; /* try again with same dentry */
}
@@ -367,7 +367,7 @@ relock:
parent = NULL;
else
parent = dentry->d_parent;
- if (parent && !spin_trylock(&parent->d_lock)) {
+ if (parent && !seq_spin_trylock(&parent->d_lock)) {
if (inode)
spin_unlock(&inode->i_lock);
goto relock;
@@ -416,11 +416,11 @@ void dput(struct dentry *dentry)
repeat:
if (dentry->d_count == 1)
might_sleep();
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
BUG_ON(!dentry->d_count);
if (dentry->d_count > 1) {
dentry->d_count--;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return;
}
@@ -438,7 +438,7 @@ repeat:
dentry_lru_add(dentry);
dentry->d_count--;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return;
kill_it:
@@ -465,9 +465,9 @@ int d_invalidate(struct dentry * dentry)
/*
* If it's already been dropped, return OK.
*/
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (d_unhashed(dentry)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return 0;
}
/*
@@ -475,9 +475,9 @@ int d_invalidate(struct dentry * dentry)
* to get rid of unused child entries.
*/
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
shrink_dcache_parent(dentry);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
}
/*
@@ -492,13 +492,13 @@ int d_invalidate(struct dentry * dentry)
*/
if (dentry->d_count > 1) {
if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return -EBUSY;
}
}
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return 0;
}
EXPORT_SYMBOL(d_invalidate);
@@ -511,9 +511,9 @@ static inline void __dget_dlock(struct dentry *dentry)
static inline void __dget(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__dget_dlock(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
struct dentry *dget_parent(struct dentry *dentry)
@@ -531,16 +531,16 @@ repeat:
rcu_read_unlock();
goto out;
}
- spin_lock(&ret->d_lock);
+ seq_spin_lock(&ret->d_lock);
if (unlikely(ret != dentry->d_parent)) {
- spin_unlock(&ret->d_lock);
+ seq_spin_unlock(&ret->d_lock);
rcu_read_unlock();
goto repeat;
}
rcu_read_unlock();
BUG_ON(!ret->d_count);
ret->d_count++;
- spin_unlock(&ret->d_lock);
+ seq_spin_unlock(&ret->d_lock);
out:
return ret;
}
@@ -569,31 +569,31 @@ static struct dentry *__d_find_alias(struct inode *inode, int want_discon)
again:
discon_alias = NULL;
list_for_each_entry(alias, &inode->i_dentry, d_alias) {
- spin_lock(&alias->d_lock);
+ seq_spin_lock(&alias->d_lock);
if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
if (IS_ROOT(alias) &&
(alias->d_flags & DCACHE_DISCONNECTED)) {
discon_alias = alias;
} else if (!want_discon) {
__dget_dlock(alias);
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
return alias;
}
}
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
}
if (discon_alias) {
alias = discon_alias;
- spin_lock(&alias->d_lock);
+ seq_spin_lock(&alias->d_lock);
if (S_ISDIR(inode->i_mode) || !d_unhashed(alias)) {
if (IS_ROOT(alias) &&
(alias->d_flags & DCACHE_DISCONNECTED)) {
__dget_dlock(alias);
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
return alias;
}
}
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
goto again;
}
return NULL;
@@ -622,16 +622,16 @@ void d_prune_aliases(struct inode *inode)
restart:
spin_lock(&inode->i_lock);
list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (!dentry->d_count) {
__dget_dlock(dentry);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
spin_unlock(&inode->i_lock);
dput(dentry);
goto restart;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
spin_unlock(&inode->i_lock);
}
@@ -668,10 +668,10 @@ static void try_prune_one_dentry(struct dentry *dentry)
/* Prune ancestors. */
dentry = parent;
while (dentry) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_count > 1) {
dentry->d_count--;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return;
}
dentry = dentry_kill(dentry, 1);
@@ -687,9 +687,9 @@ static void shrink_dentry_list(struct list_head *list)
dentry = list_entry_rcu(list->prev, struct dentry, d_lru);
if (&dentry->d_lru == list)
break; /* empty */
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry != list_entry(list->prev, struct dentry, d_lru)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
continue;
}
@@ -700,7 +700,7 @@ static void shrink_dentry_list(struct list_head *list)
*/
if (dentry->d_count) {
dentry_lru_del(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
continue;
}
@@ -736,7 +736,7 @@ relock:
struct dentry, d_lru);
BUG_ON(dentry->d_sb != sb);
- if (!spin_trylock(&dentry->d_lock)) {
+ if (!seq_spin_trylock(&dentry->d_lock)) {
spin_unlock(&dcache_lru_lock);
cpu_relax();
goto relock;
@@ -751,11 +751,11 @@ relock:
dentry->d_flags & DCACHE_REFERENCED) {
dentry->d_flags &= ~DCACHE_REFERENCED;
list_move(&dentry->d_lru, &referenced);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
} else {
list_move_tail(&dentry->d_lru, &tmp);
dentry->d_flags |= DCACHE_SHRINK_LIST;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (!--cnt)
break;
}
@@ -880,10 +880,10 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
BUG_ON(!IS_ROOT(dentry));
/* detach this root from the system */
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry_lru_del(dentry);
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
for (;;) {
/* descend to the first leaf in the current subtree */
@@ -892,16 +892,16 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
/* this is a branch with children - detach all of them
* from the system in one go */
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
list_for_each_entry(loop, &dentry->d_subdirs,
d_u.d_child) {
- spin_lock_nested(&loop->d_lock,
+ seq_spin_lock_nested(&loop->d_lock,
DENTRY_D_LOCK_NESTED);
dentry_lru_del(loop);
__d_drop(loop);
- spin_unlock(&loop->d_lock);
+ seq_spin_unlock(&loop->d_lock);
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/* move to the first child */
dentry = list_entry(dentry->d_subdirs.next,
@@ -933,10 +933,10 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
list_del(&dentry->d_u.d_child);
} else {
parent = dentry->d_parent;
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
parent->d_count--;
list_del(&dentry->d_u.d_child);
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
}
detached++;
@@ -985,9 +985,9 @@ void shrink_dcache_for_umount(struct super_block *sb)
dentry = sb->s_root;
sb->s_root = NULL;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_count--;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
shrink_dcache_for_umount_subtree(dentry);
while (!hlist_bl_empty(&sb->s_anon)) {
@@ -1007,8 +1007,8 @@ static struct dentry *try_to_ascend(struct dentry *old, int locked, unsigned seq
struct dentry *new = old->d_parent;
rcu_read_lock();
- spin_unlock(&old->d_lock);
- spin_lock(&new->d_lock);
+ seq_spin_unlock(&old->d_lock);
+ seq_spin_lock(&new->d_lock);
/*
* might go back up the wrong parent if we have had a rename
@@ -1017,7 +1017,7 @@ static struct dentry *try_to_ascend(struct dentry *old, int locked, unsigned seq
if (new != old->d_parent ||
(old->d_flags & DCACHE_DISCONNECTED) ||
(!locked && read_seqretry(&rename_lock, seq))) {
- spin_unlock(&new->d_lock);
+ seq_spin_unlock(&new->d_lock);
new = NULL;
}
rcu_read_unlock();
@@ -1051,7 +1051,7 @@ again:
if (d_mountpoint(parent))
goto positive;
- spin_lock(&this_parent->d_lock);
+ seq_spin_lock(&this_parent->d_lock);
repeat:
next = this_parent->d_subdirs.next;
resume:
@@ -1060,21 +1060,21 @@ resume:
struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
next = tmp->next;
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
/* Have we found a mount point ? */
if (d_mountpoint(dentry)) {
- spin_unlock(&dentry->d_lock);
- spin_unlock(&this_parent->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&this_parent->d_lock);
goto positive;
}
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&this_parent->d_lock);
- spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+ seq_spin_unlock(&this_parent->d_lock);
+ spin_release(&dentry->d_lock.lock.dep_map, 1, _RET_IP_);
this_parent = dentry;
- spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
+ spin_acquire(&this_parent->d_lock.lock.dep_map, 0, 1, _RET_IP_);
goto repeat;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
* All done at this level ... ascend and resume the search.
@@ -1087,7 +1087,7 @@ resume:
next = child->d_u.d_child.next;
goto resume;
}
- spin_unlock(&this_parent->d_lock);
+ seq_spin_unlock(&this_parent->d_lock);
if (!locked && read_seqretry(&rename_lock, seq))
goto rename_retry;
if (locked)
@@ -1132,7 +1132,7 @@ static int select_parent(struct dentry * parent)
seq = read_seqbegin(&rename_lock);
again:
this_parent = parent;
- spin_lock(&this_parent->d_lock);
+ seq_spin_lock(&this_parent->d_lock);
repeat:
next = this_parent->d_subdirs.next;
resume:
@@ -1141,7 +1141,7 @@ resume:
struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
next = tmp->next;
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
/*
* move only zero ref count dentries to the end
@@ -1164,7 +1164,7 @@ resume:
* the rest.
*/
if (found && need_resched()) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
goto out;
}
@@ -1172,14 +1172,14 @@ resume:
* Descend a level if the d_subdirs list is non-empty.
*/
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&this_parent->d_lock);
- spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+ seq_spin_unlock(&this_parent->d_lock);
+ spin_release(&dentry->d_lock.lock.dep_map, 1, _RET_IP_);
this_parent = dentry;
- spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
+ spin_acquire(&this_parent->d_lock.lock.dep_map, 0, 1, _RET_IP_);
goto repeat;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
* All done at this level ... ascend and resume the search.
@@ -1193,7 +1193,7 @@ resume:
goto resume;
}
out:
- spin_unlock(&this_parent->d_lock);
+ seq_spin_unlock(&this_parent->d_lock);
if (!locked && read_seqretry(&rename_lock, seq))
goto rename_retry;
if (locked)
@@ -1294,8 +1294,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
dentry->d_count = 1;
dentry->d_flags = 0;
- spin_lock_init(&dentry->d_lock);
- seqcount_init(&dentry->d_seq);
+ seqlock_init(&dentry->d_lock);
dentry->d_inode = NULL;
dentry->d_parent = NULL;
dentry->d_sb = NULL;
@@ -1308,7 +1307,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
INIT_LIST_HEAD(&dentry->d_u.d_child);
if (parent) {
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
/*
* don't need child lock because it is not subject
* to concurrency here
@@ -1318,7 +1317,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
dentry->d_sb = parent->d_sb;
d_set_d_op(dentry, dentry->d_sb->s_d_op);
list_add(&dentry->d_u.d_child, &parent->d_subdirs);
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
}
this_cpu_inc(nr_dentry);
@@ -1375,7 +1374,7 @@ EXPORT_SYMBOL(d_set_d_op);
static void __d_instantiate(struct dentry *dentry, struct inode *inode)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (inode) {
if (unlikely(IS_AUTOMOUNT(inode)))
dentry->d_flags |= DCACHE_NEED_AUTOMOUNT;
@@ -1383,7 +1382,7 @@ static void __d_instantiate(struct dentry *dentry, struct inode *inode)
}
dentry->d_inode = inode;
dentry_rcuwalk_barrier(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
fsnotify_d_instantiate(dentry, inode);
}
@@ -1589,7 +1588,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
}
/* attach a disconnected dentry */
- spin_lock(&tmp->d_lock);
+ seq_spin_lock(&tmp->d_lock);
tmp->d_sb = inode->i_sb;
d_set_d_op(tmp, tmp->d_sb->s_d_op);
tmp->d_inode = inode;
@@ -1598,7 +1597,7 @@ struct dentry *d_obtain_alias(struct inode *inode)
hlist_bl_lock(&tmp->d_sb->s_anon);
hlist_bl_add_head(&tmp->d_hash, &tmp->d_sb->s_anon);
hlist_bl_unlock(&tmp->d_sb->s_anon);
- spin_unlock(&tmp->d_lock);
+ seq_spin_unlock(&tmp->d_lock);
spin_unlock(&inode->i_lock);
security_d_instantiate(tmp, inode);
@@ -1810,7 +1809,7 @@ struct dentry *__d_lookup_rcu(struct dentry *parent, struct qstr *name,
continue;
seqretry:
- *seq = read_seqcount_begin(&dentry->d_seq);
+ *seq = read_seqbegin(&dentry->d_lock);
if (dentry->d_parent != parent)
continue;
if (d_unhashed(dentry))
@@ -1825,7 +1824,7 @@ seqretry:
* edge of memory when walking. If we could load this
* atomically some other way, we could drop this check.
*/
- if (read_seqcount_retry(&dentry->d_seq, *seq))
+ if (read_seqretry(&dentry->d_lock, *seq))
goto seqretry;
if (parent->d_flags & DCACHE_OP_COMPARE) {
if (parent->d_op->d_compare(parent, *inode,
@@ -1928,7 +1927,7 @@ struct dentry *__d_lookup(struct dentry *parent, struct qstr *name)
if (dentry->d_name.hash != hash)
continue;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_parent != parent)
goto next;
if (d_unhashed(dentry))
@@ -1952,10 +1951,10 @@ struct dentry *__d_lookup(struct dentry *parent, struct qstr *name)
dentry->d_count++;
found = dentry;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
break;
next:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
rcu_read_unlock();
@@ -2003,17 +2002,17 @@ int d_validate(struct dentry *dentry, struct dentry *dparent)
{
struct dentry *child;
- spin_lock(&dparent->d_lock);
+ seq_spin_lock(&dparent->d_lock);
list_for_each_entry(child, &dparent->d_subdirs, d_u.d_child) {
if (dentry == child) {
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
__dget_dlock(dentry);
- spin_unlock(&dentry->d_lock);
- spin_unlock(&dparent->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dparent->d_lock);
return 1;
}
}
- spin_unlock(&dparent->d_lock);
+ seq_spin_unlock(&dparent->d_lock);
return 0;
}
@@ -2048,12 +2047,12 @@ void d_delete(struct dentry * dentry)
* Are we the only user?
*/
again:
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
inode = dentry->d_inode;
isdir = S_ISDIR(inode->i_mode);
if (dentry->d_count == 1) {
if (inode && !spin_trylock(&inode->i_lock)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
cpu_relax();
goto again;
}
@@ -2066,7 +2065,7 @@ again:
if (!d_unhashed(dentry))
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
fsnotify_nameremove(dentry, isdir);
}
@@ -2095,9 +2094,9 @@ static void _d_rehash(struct dentry * entry)
void d_rehash(struct dentry * entry)
{
- spin_lock(&entry->d_lock);
+ seq_spin_lock(&entry->d_lock);
_d_rehash(entry);
- spin_unlock(&entry->d_lock);
+ seq_spin_unlock(&entry->d_lock);
}
EXPORT_SYMBOL(d_rehash);
@@ -2120,11 +2119,9 @@ void dentry_update_name_case(struct dentry *dentry, struct qstr *name)
BUG_ON(!mutex_is_locked(&dentry->d_parent->d_inode->i_mutex));
BUG_ON(dentry->d_name.len != name->len); /* d_lookup gives this */
- spin_lock(&dentry->d_lock);
- write_seqcount_begin(&dentry->d_seq);
+ write_seqlock(&dentry->d_lock);
memcpy((unsigned char *)dentry->d_name.name, name->name, name->len);
- write_seqcount_end(&dentry->d_seq);
- spin_unlock(&dentry->d_lock);
+ write_sequnlock(&dentry->d_lock);
}
EXPORT_SYMBOL(dentry_update_name_case);
@@ -2175,24 +2172,24 @@ static void dentry_lock_for_move(struct dentry *dentry, struct dentry *target)
* XXXX: do we really need to take target->d_lock?
*/
if (IS_ROOT(dentry) || dentry->d_parent == target->d_parent)
- spin_lock(&target->d_parent->d_lock);
+ seq_spin_lock(&target->d_parent->d_lock);
else {
if (d_ancestor(dentry->d_parent, target->d_parent)) {
- spin_lock(&dentry->d_parent->d_lock);
- spin_lock_nested(&target->d_parent->d_lock,
- DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&dentry->d_parent->d_lock);
+ seq_spin_lock_nested(&target->d_parent->d_lock,
+ DENTRY_D_LOCK_NESTED);
} else {
- spin_lock(&target->d_parent->d_lock);
- spin_lock_nested(&dentry->d_parent->d_lock,
- DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&target->d_parent->d_lock);
+ seq_spin_lock_nested(&dentry->d_parent->d_lock,
+ DENTRY_D_LOCK_NESTED);
}
}
if (target < dentry) {
- spin_lock_nested(&target->d_lock, 2);
- spin_lock_nested(&dentry->d_lock, 3);
+ seq_spin_lock_nested(&target->d_lock, 2);
+ seq_spin_lock_nested(&dentry->d_lock, 3);
} else {
- spin_lock_nested(&dentry->d_lock, 2);
- spin_lock_nested(&target->d_lock, 3);
+ seq_spin_lock_nested(&dentry->d_lock, 2);
+ seq_spin_lock_nested(&target->d_lock, 3);
}
}
@@ -2200,9 +2197,9 @@ static void dentry_unlock_parents_for_move(struct dentry *dentry,
struct dentry *target)
{
if (target->d_parent != dentry->d_parent)
- spin_unlock(&dentry->d_parent->d_lock);
+ seq_spin_unlock(&dentry->d_parent->d_lock);
if (target->d_parent != target)
- spin_unlock(&target->d_parent->d_lock);
+ seq_spin_unlock(&target->d_parent->d_lock);
}
/*
@@ -2235,8 +2232,8 @@ static void __d_move(struct dentry * dentry, struct dentry * target)
dentry_lock_for_move(dentry, target);
- write_seqcount_begin(&dentry->d_seq);
- write_seqcount_begin(&target->d_seq);
+ write_seqlock_begin(&dentry->d_lock);
+ write_seqlock_begin(&target->d_lock);
/* __d_drop does write_seqcount_barrier, but they're OK to nest. */
@@ -2271,13 +2268,13 @@ static void __d_move(struct dentry * dentry, struct dentry * target)
list_add(&dentry->d_u.d_child, &dentry->d_parent->d_subdirs);
- write_seqcount_end(&target->d_seq);
- write_seqcount_end(&dentry->d_seq);
+ write_seqlock_end(&target->d_lock);
+ write_seqlock_end(&dentry->d_lock);
dentry_unlock_parents_for_move(dentry, target);
- spin_unlock(&target->d_lock);
+ seq_spin_unlock(&target->d_lock);
fsnotify_d_move(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
@@ -2365,8 +2362,8 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
dentry_lock_for_move(anon, dentry);
- write_seqcount_begin(&dentry->d_seq);
- write_seqcount_begin(&anon->d_seq);
+ write_seqlock_begin(&dentry->d_lock);
+ write_seqlock_begin(&anon->d_lock);
dparent = dentry->d_parent;
aparent = anon->d_parent;
@@ -2388,11 +2385,11 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
else
INIT_LIST_HEAD(&anon->d_u.d_child);
- write_seqcount_end(&dentry->d_seq);
- write_seqcount_end(&anon->d_seq);
+ write_seqlock_end(&dentry->d_lock);
+ write_seqlock_end(&anon->d_lock);
dentry_unlock_parents_for_move(anon, dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/* anon->d_lock still locked, returns locked */
anon->d_flags &= ~DCACHE_DISCONNECTED;
@@ -2459,10 +2456,10 @@ struct dentry *d_materialise_unique(struct dentry *dentry, struct inode *inode)
else
BUG_ON(!d_unhashed(actual));
- spin_lock(&actual->d_lock);
+ seq_spin_lock(&actual->d_lock);
found:
_d_rehash(actual);
- spin_unlock(&actual->d_lock);
+ seq_spin_unlock(&actual->d_lock);
spin_unlock(&inode->i_lock);
out_nolock:
if (actual == dentry) {
@@ -2523,9 +2520,9 @@ static int prepend_path(const struct path *path,
}
parent = dentry->d_parent;
prefetch(parent);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
error = prepend_name(buffer, buflen, &dentry->d_name);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (!error)
error = prepend(buffer, buflen, "/", 1);
if (error)
@@ -2750,9 +2747,9 @@ static char *__dentry_path(struct dentry *dentry, char *buf, int buflen)
int error;
prefetch(parent);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
error = prepend_name(&end, &buflen, &dentry->d_name);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (error != 0 || prepend(&end, &buflen, "/", 1) != 0)
goto Elong;
@@ -2942,7 +2939,7 @@ void d_genocide(struct dentry *root)
seq = read_seqbegin(&rename_lock);
again:
this_parent = root;
- spin_lock(&this_parent->d_lock);
+ seq_spin_lock(&this_parent->d_lock);
repeat:
next = this_parent->d_subdirs.next;
resume:
@@ -2951,23 +2948,23 @@ resume:
struct dentry *dentry = list_entry(tmp, struct dentry, d_u.d_child);
next = tmp->next;
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
if (d_unhashed(dentry) || !dentry->d_inode) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
continue;
}
if (!list_empty(&dentry->d_subdirs)) {
- spin_unlock(&this_parent->d_lock);
- spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+ seq_spin_unlock(&this_parent->d_lock);
+ spin_release(&dentry->d_lock.lock.dep_map, 1, _RET_IP_);
this_parent = dentry;
- spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
+ spin_acquire(&this_parent->d_lock.lock.dep_map, 0, 1, _RET_IP_);
goto repeat;
}
if (!(dentry->d_flags & DCACHE_GENOCIDE)) {
dentry->d_flags |= DCACHE_GENOCIDE;
dentry->d_count--;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
if (this_parent != root) {
struct dentry *child = this_parent;
@@ -2981,7 +2978,7 @@ resume:
next = child->d_u.d_child.next;
goto resume;
}
- spin_unlock(&this_parent->d_lock);
+ seq_spin_unlock(&this_parent->d_lock);
if (!locked && read_seqretry(&rename_lock, seq))
goto rename_retry;
if (locked)
diff --git a/fs/dcookies.c b/fs/dcookies.c
index dda0dc7..3805e33 100644
--- a/fs/dcookies.c
+++ b/fs/dcookies.c
@@ -98,9 +98,9 @@ static struct dcookie_struct *alloc_dcookie(struct path *path)
return NULL;
d = path->dentry;
- spin_lock(&d->d_lock);
+ seq_spin_lock(&d->d_lock);
d->d_flags |= DCACHE_COOKIE;
- spin_unlock(&d->d_lock);
+ seq_spin_unlock(&d->d_lock);
dcs->path = *path;
path_get(path);
@@ -267,9 +267,9 @@ static void free_dcookie(struct dcookie_struct * dcs)
{
struct dentry *d = dcs->path.dentry;
- spin_lock(&d->d_lock);
+ seq_spin_lock(&d->d_lock);
d->d_flags &= ~DCACHE_COOKIE;
- spin_unlock(&d->d_lock);
+ seq_spin_unlock(&d->d_lock);
path_put(&dcs->path);
kmem_cache_free(dcookie_cache, dcs);
diff --git a/fs/exec.c b/fs/exec.c
index 709557e..3116940 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1230,7 +1230,7 @@ int check_unsafe_exec(struct linux_binprm *bprm)
bprm->unsafe = tracehook_unsafe_exec(p);
n_fs = 1;
- spin_lock(&p->fs->lock);
+ seq_spin_lock(&p->fs->lock);
rcu_read_lock();
for (t = next_thread(p); t != p; t = next_thread(t)) {
if (t->fs == p->fs)
@@ -1247,7 +1247,7 @@ int check_unsafe_exec(struct linux_binprm *bprm)
res = 1;
}
}
- spin_unlock(&p->fs->lock);
+ seq_spin_unlock(&p->fs->lock);
return res;
}
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index b05acb7..4515886 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -114,15 +114,15 @@ reconnect_path(struct vfsmount *mnt, struct dentry *target_dir, char *nbuf)
if (!IS_ROOT(pd)) {
/* must have found a connected parent - great */
- spin_lock(&pd->d_lock);
+ seq_spin_lock(&pd->d_lock);
pd->d_flags &= ~DCACHE_DISCONNECTED;
- spin_unlock(&pd->d_lock);
+ seq_spin_unlock(&pd->d_lock);
noprogress = 0;
} else if (pd == mnt->mnt_sb->s_root) {
printk(KERN_ERR "export: Eeek filesystem root is not connected, impossible\n");
- spin_lock(&pd->d_lock);
+ seq_spin_lock(&pd->d_lock);
pd->d_flags &= ~DCACHE_DISCONNECTED;
- spin_unlock(&pd->d_lock);
+ seq_spin_unlock(&pd->d_lock);
noprogress = 0;
} else {
/*
@@ -335,11 +335,11 @@ static int export_encode_fh(struct dentry *dentry, struct fid *fid,
if (connectable && !S_ISDIR(inode->i_mode)) {
struct inode *parent;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
fid->i32.parent_ino = parent->i_ino;
fid->i32.parent_gen = parent->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
len = 4;
type = FILEID_INO32_GEN_PARENT;
}
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 44ab357..6df880d 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -770,9 +770,9 @@ fat_encode_fh(struct dentry *de, __u32 *fh, int *lenp, int connectable)
fh[1] = inode->i_generation;
fh[2] = ipos_h;
fh[3] = ipos_m | MSDOS_I(inode)->i_logstart;
- spin_lock(&de->d_lock);
+ seq_spin_lock(&de->d_lock);
fh[4] = ipos_l | MSDOS_I(de->d_parent->d_inode)->i_logstart;
- spin_unlock(&de->d_lock);
+ seq_spin_unlock(&de->d_lock);
return 3;
}
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 20b4ea5..74a0c20 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -34,10 +34,10 @@
static int vfat_revalidate_shortname(struct dentry *dentry)
{
int ret = 1;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_time != dentry->d_parent->d_inode->i_version)
ret = 0;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return ret;
}
diff --git a/fs/fhandle.c b/fs/fhandle.c
index 6b08864..9f437ac 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -115,10 +115,10 @@ static struct vfsmount *get_vfsmount_from_fd(int fd)
if (fd == AT_FDCWD) {
struct fs_struct *fs = current->fs;
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
path = fs->pwd;
mntget(path.mnt);
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
} else {
int fput_needed;
struct file *file = fget_light(fd, &fput_needed);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index fe190a8..50aed02 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -985,7 +985,7 @@ static noinline void block_dump___mark_inode_dirty(struct inode *inode)
dentry = d_find_alias(inode);
if (dentry) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
name = (const char *) dentry->d_name.name;
}
printk(KERN_DEBUG
@@ -993,7 +993,7 @@ static noinline void block_dump___mark_inode_dirty(struct inode *inode)
current->comm, task_pid_nr(current), inode->i_ino,
name, inode->i_sb->s_id);
if (dentry) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
dput(dentry);
}
}
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index 78b519c..84db5f1 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -26,13 +26,11 @@ void set_fs_root(struct fs_struct *fs, struct path *path)
{
struct path old_root;
- spin_lock(&fs->lock);
- write_seqcount_begin(&fs->seq);
+ write_seqlock(&fs->lock);
old_root = fs->root;
fs->root = *path;
path_get_longterm(path);
- write_seqcount_end(&fs->seq);
- spin_unlock(&fs->lock);
+ write_sequnlock(&fs->lock);
if (old_root.dentry)
path_put_longterm(&old_root);
}
@@ -45,13 +43,11 @@ void set_fs_pwd(struct fs_struct *fs, struct path *path)
{
struct path old_pwd;
- spin_lock(&fs->lock);
- write_seqcount_begin(&fs->seq);
+ write_seqlock(&fs->lock);
old_pwd = fs->pwd;
fs->pwd = *path;
path_get_longterm(path);
- write_seqcount_end(&fs->seq);
- spin_unlock(&fs->lock);
+ write_sequnlock(&fs->lock);
if (old_pwd.dentry)
path_put_longterm(&old_pwd);
@@ -68,8 +64,7 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
task_lock(p);
fs = p->fs;
if (fs) {
- spin_lock(&fs->lock);
- write_seqcount_begin(&fs->seq);
+ write_seqlock(&fs->lock);
if (fs->root.dentry == old_root->dentry
&& fs->root.mnt == old_root->mnt) {
path_get_longterm(new_root);
@@ -82,8 +77,7 @@ void chroot_fs_refs(struct path *old_root, struct path *new_root)
fs->pwd = *new_root;
count++;
}
- write_seqcount_end(&fs->seq);
- spin_unlock(&fs->lock);
+ write_sequnlock(&fs->lock);
}
task_unlock(p);
} while_each_thread(g, p);
@@ -106,12 +100,10 @@ void exit_fs(struct task_struct *tsk)
if (fs) {
int kill;
task_lock(tsk);
- spin_lock(&fs->lock);
- write_seqcount_begin(&fs->seq);
+ write_seqlock(&fs->lock);
tsk->fs = NULL;
kill = !--fs->users;
- write_seqcount_end(&fs->seq);
- spin_unlock(&fs->lock);
+ write_sequnlock(&fs->lock);
task_unlock(tsk);
if (kill)
free_fs_struct(fs);
@@ -125,16 +117,15 @@ struct fs_struct *copy_fs_struct(struct fs_struct *old)
if (fs) {
fs->users = 1;
fs->in_exec = 0;
- spin_lock_init(&fs->lock);
- seqcount_init(&fs->seq);
+ seqlock_init(&fs->lock);
fs->umask = old->umask;
- spin_lock(&old->lock);
+ seq_spin_lock(&old->lock);
fs->root = old->root;
path_get_longterm(&fs->root);
fs->pwd = old->pwd;
path_get_longterm(&fs->pwd);
- spin_unlock(&old->lock);
+ seq_spin_unlock(&old->lock);
}
return fs;
}
@@ -149,10 +140,10 @@ int unshare_fs_struct(void)
return -ENOMEM;
task_lock(current);
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
kill = !--fs->users;
current->fs = new_fs;
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
task_unlock(current);
if (kill)
@@ -171,8 +162,7 @@ EXPORT_SYMBOL(current_umask);
/* to be mentioned only in INIT_TASK */
struct fs_struct init_fs = {
.users = 1,
- .lock = __SPIN_LOCK_UNLOCKED(init_fs.lock),
- .seq = SEQCNT_ZERO,
+ .lock = __SEQLOCK_UNLOCKED(init_fs.lock),
.umask = 0022,
};
@@ -185,14 +175,14 @@ void daemonize_fs_struct(void)
task_lock(current);
- spin_lock(&init_fs.lock);
+ seq_spin_lock(&init_fs.lock);
init_fs.users++;
- spin_unlock(&init_fs.lock);
+ seq_spin_unlock(&init_fs.lock);
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
current->fs = &init_fs;
kill = !--fs->users;
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
task_unlock(current);
if (kill)
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 38f84cd..77e6c1c 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -652,11 +652,11 @@ static int fuse_encode_fh(struct dentry *dentry, u32 *fh, int *max_len,
if (encode_parent) {
struct inode *parent;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
nodeid = get_fuse_inode(parent)->nodeid;
generation = parent->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
fh[3] = (u32)(nodeid >> 32);
fh[4] = (u32)(nodeid & 0xffffffff);
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index fe9945f..dcc2f5a 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -53,11 +53,11 @@ static int gfs2_encode_fh(struct dentry *dentry, __u32 *p, int *len,
if (!connectable || inode == sb->s_root->d_inode)
return *len;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
inode = dentry->d_parent->d_inode;
ip = GFS2_I(inode);
igrab(inode);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
fh[4] = cpu_to_be32(ip->i_no_formal_ino >> 32);
fh[5] = cpu_to_be32(ip->i_no_formal_ino & 0xFFFFFFFF);
diff --git a/fs/isofs/export.c b/fs/isofs/export.c
index dd4687f..378505b 100644
--- a/fs/isofs/export.c
+++ b/fs/isofs/export.c
@@ -139,13 +139,13 @@ isofs_export_encode_fh(struct dentry *dentry,
if (connectable && !S_ISDIR(inode->i_mode)) {
struct inode *parent;
struct iso_inode_info *eparent;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
eparent = ISOFS_I(parent);
fh32[3] = eparent->i_iget5_block;
fh16[3] = (__u16)eparent->i_iget5_offset; /* fh16 [sic] */
fh32[4] = parent->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
len = 5;
type = 2;
}
diff --git a/fs/libfs.c b/fs/libfs.c
index 275ca474..b06c1a0 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -100,21 +100,21 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int origin)
struct dentry *cursor = file->private_data;
loff_t n = file->f_pos - 2;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
/* d_lock not required for cursor */
list_del(&cursor->d_u.d_child);
p = dentry->d_subdirs.next;
while (n && p != &dentry->d_subdirs) {
struct dentry *next;
next = list_entry(p, struct dentry, d_u.d_child);
- spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
if (simple_positive(next))
n--;
- spin_unlock(&next->d_lock);
+ seq_spin_unlock(&next->d_lock);
p = p->next;
}
list_add_tail(&cursor->d_u.d_child, p);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
}
mutex_unlock(&dentry->d_inode->i_mutex);
@@ -157,35 +157,35 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
i++;
/* fallthrough */
default:
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (filp->f_pos == 2)
list_move(q, &dentry->d_subdirs);
for (p=q->next; p != &dentry->d_subdirs; p=p->next) {
struct dentry *next;
next = list_entry(p, struct dentry, d_u.d_child);
- spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
if (!simple_positive(next)) {
- spin_unlock(&next->d_lock);
+ seq_spin_unlock(&next->d_lock);
continue;
}
- spin_unlock(&next->d_lock);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&next->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (filldir(dirent, next->d_name.name,
next->d_name.len, filp->f_pos,
next->d_inode->i_ino,
dt_type(next->d_inode)) < 0)
return 0;
- spin_lock(&dentry->d_lock);
- spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&dentry->d_lock);
+ seq_spin_lock_nested(&next->d_lock, DENTRY_D_LOCK_NESTED);
/* next is still alive */
list_move(q, p);
- spin_unlock(&next->d_lock);
+ seq_spin_unlock(&next->d_lock);
p = q;
filp->f_pos++;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
return 0;
}
@@ -281,18 +281,18 @@ int simple_empty(struct dentry *dentry)
struct dentry *child;
int ret = 0;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
list_for_each_entry(child, &dentry->d_subdirs, d_u.d_child) {
- spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
if (simple_positive(child)) {
- spin_unlock(&child->d_lock);
+ seq_spin_unlock(&child->d_lock);
goto out;
}
- spin_unlock(&child->d_lock);
+ seq_spin_unlock(&child->d_lock);
}
ret = 1;
out:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return ret;
}
diff --git a/fs/namei.c b/fs/namei.c
index f7593c0..4993e8f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -424,12 +424,12 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
BUG_ON(!(nd->flags & LOOKUP_RCU));
if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) {
want_root = 1;
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
if (nd->root.mnt != fs->root.mnt ||
nd->root.dentry != fs->root.dentry)
goto err_root;
}
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
if (!dentry) {
if (!__d_rcu_to_refcount(parent, nd->seq))
goto err_parent;
@@ -437,7 +437,7 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
} else {
if (dentry->d_parent != parent)
goto err_parent;
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
if (!__d_rcu_to_refcount(dentry, nd->seq))
goto err_child;
/*
@@ -449,12 +449,12 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
BUG_ON(!IS_ROOT(dentry) && dentry->d_parent != parent);
BUG_ON(!parent->d_count);
parent->d_count++;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
if (want_root) {
path_get(&nd->root);
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
}
mntget(nd->path.mnt);
@@ -464,12 +464,12 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry)
return 0;
err_child:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
err_parent:
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
err_root:
if (want_root)
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
return -ECHILD;
}
@@ -535,15 +535,15 @@ static int complete_walk(struct nameidata *nd)
nd->flags &= ~LOOKUP_RCU;
if (!(nd->flags & LOOKUP_ROOT))
nd->root.mnt = NULL;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (unlikely(!__d_rcu_to_refcount(dentry, nd->seq))) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
br_read_unlock(vfsmount_lock);
return -ECHILD;
}
BUG_ON(nd->inode != dentry->d_inode);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
mntget(nd->path.mnt);
rcu_read_unlock();
br_read_unlock(vfsmount_lock);
@@ -619,10 +619,10 @@ static __always_inline void set_root_rcu(struct nameidata *nd)
unsigned seq;
do {
- seq = read_seqcount_begin(&fs->seq);
+ seq = read_seqbegin(&fs->lock);
nd->root = fs->root;
- nd->seq = __read_seqcount_begin(&nd->root.dentry->d_seq);
- } while (read_seqcount_retry(&fs->seq, seq));
+ nd->seq = __read_seqbegin(&nd->root.dentry->d_lock);
+ } while (read_seqretry(&fs->lock, seq));
}
}
@@ -959,7 +959,7 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
path->mnt = mounted;
path->dentry = mounted->mnt_root;
nd->flags |= LOOKUP_JUMPED;
- nd->seq = read_seqcount_begin(&path->dentry->d_seq);
+ nd->seq = read_seqbegin(&path->dentry->d_lock);
/*
* Update the inode too. We don't need to re-check the
* dentry sequence number here after this d_inode read,
@@ -979,7 +979,7 @@ static void follow_mount_rcu(struct nameidata *nd)
break;
nd->path.mnt = mounted;
nd->path.dentry = mounted->mnt_root;
- nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq);
+ nd->seq = read_seqbegin(&nd->path.dentry->d_lock);
}
}
@@ -997,8 +997,8 @@ static int follow_dotdot_rcu(struct nameidata *nd)
struct dentry *parent = old->d_parent;
unsigned seq;
- seq = read_seqcount_begin(&parent->d_seq);
- if (read_seqcount_retry(&old->d_seq, nd->seq))
+ seq = read_seqbegin(&parent->d_lock);
+ if (read_seqretry(&old->d_lock, nd->seq))
goto failed;
nd->path.dentry = parent;
nd->seq = seq;
@@ -1006,7 +1006,7 @@ static int follow_dotdot_rcu(struct nameidata *nd)
}
if (!follow_up_rcu(&nd->path))
break;
- nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq);
+ nd->seq = read_seqbegin(&nd->path.dentry->d_lock);
}
follow_mount_rcu(nd);
nd->inode = nd->path.dentry->d_inode;
@@ -1166,7 +1166,7 @@ static int do_lookup(struct nameidata *nd, struct qstr *name,
goto unlazy;
/* Memory barrier in read_seqcount_begin of child is enough */
- if (__read_seqcount_retry(&parent->d_seq, nd->seq))
+ if (__read_seqretry(&parent->d_lock, nd->seq))
return -ECHILD;
nd->seq = seq;
@@ -1473,7 +1473,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
if (flags & LOOKUP_RCU) {
br_read_lock(vfsmount_lock);
rcu_read_lock();
- nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
+ nd->seq = __read_seqbegin(&nd->path.dentry->d_lock);
} else {
path_get(&nd->path);
}
@@ -1501,10 +1501,10 @@ static int path_init(int dfd, const char *name, unsigned int flags,
rcu_read_lock();
do {
- seq = read_seqcount_begin(&fs->seq);
+ seq = read_seqbegin(&fs->lock);
nd->path = fs->pwd;
- nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
- } while (read_seqcount_retry(&fs->seq, seq));
+ nd->seq = __read_seqbegin(&nd->path.dentry->d_lock);
+ } while (read_seqretry(&fs->lock, seq));
} else {
get_fs_pwd(current->fs, &nd->path);
}
@@ -1532,7 +1532,7 @@ static int path_init(int dfd, const char *name, unsigned int flags,
if (flags & LOOKUP_RCU) {
if (fput_needed)
*fp = file;
- nd->seq = __read_seqcount_begin(&nd->path.dentry->d_seq);
+ nd->seq = __read_seqbegin(&nd->path.dentry->d_lock);
br_read_lock(vfsmount_lock);
rcu_read_lock();
} else {
@@ -2591,10 +2591,10 @@ SYSCALL_DEFINE2(mkdir, const char __user *, pathname, int, mode)
void dentry_unhash(struct dentry *dentry)
{
shrink_dcache_parent(dentry);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_count == 1)
__d_drop(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
int vfs_rmdir(struct inode *dir, struct dentry *dentry)
diff --git a/fs/namespace.c b/fs/namespace.c
index 472caea..c563781 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -564,9 +564,9 @@ static void dentry_reset_mounted(struct vfsmount *mnt, struct dentry *dentry)
return;
}
}
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_flags &= ~DCACHE_MOUNTED;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
@@ -591,9 +591,9 @@ void mnt_set_mountpoint(struct vfsmount *mnt, struct dentry *dentry,
{
child_mnt->mnt_parent = mntget(mnt);
child_mnt->mnt_mountpoint = dget(dentry);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_flags |= DCACHE_MOUNTED;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c
index 9c51f62..3c7d069 100644
--- a/fs/ncpfs/dir.c
+++ b/fs/ncpfs/dir.c
@@ -388,7 +388,7 @@ ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
}
/* If a pointer is invalid, we search the dentry. */
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
dent = list_entry(next, struct dentry, d_u.d_child);
@@ -397,12 +397,12 @@ ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos)
dget(dent);
else
dent = NULL;
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
goto out;
}
next = next->next;
}
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
return NULL;
out:
diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h
index 09881e6..d9ac5e5 100644
--- a/fs/ncpfs/ncplib_kernel.h
+++ b/fs/ncpfs/ncplib_kernel.h
@@ -191,7 +191,7 @@ ncp_renew_dentries(struct dentry *parent)
struct list_head *next;
struct dentry *dentry;
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
dentry = list_entry(next, struct dentry, d_u.d_child);
@@ -203,7 +203,7 @@ ncp_renew_dentries(struct dentry *parent)
next = next->next;
}
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
}
static inline void
@@ -213,7 +213,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent)
struct list_head *next;
struct dentry *dentry;
- spin_lock(&parent->d_lock);
+ seq_spin_lock(&parent->d_lock);
next = parent->d_subdirs.next;
while (next != &parent->d_subdirs) {
dentry = list_entry(next, struct dentry, d_u.d_child);
@@ -221,7 +221,7 @@ ncp_invalidate_dircache_entries(struct dentry *parent)
ncp_age_dentry(server, dentry);
next = next->next;
}
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&parent->d_lock);
}
struct ncp_cache_head {
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 462a006..e0ce566 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1813,9 +1813,9 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_count > 1) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/* Start asynchronous writeout of the inode */
write_inode_now(dentry->d_inode, 0);
error = nfs_sillyrename(dir, dentry);
@@ -1825,7 +1825,7 @@ static int nfs_unlink(struct inode *dir, struct dentry *dentry)
__d_drop(dentry);
need_rehash = 1;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
error = nfs_safe_remove(dentry);
if (!error || error == -ENOENT) {
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index dcb6154..02ecd4d 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -64,9 +64,9 @@ static int nfs_superblock_set_dummy_root(struct super_block *sb, struct inode *i
* Oops, since the test for IS_ROOT() will fail.
*/
spin_lock(&sb->s_root->d_inode->i_lock);
- spin_lock(&sb->s_root->d_lock);
+ seq_spin_lock(&sb->s_root->d_lock);
list_del_init(&sb->s_root->d_alias);
- spin_unlock(&sb->s_root->d_lock);
+ seq_spin_unlock(&sb->s_root->d_lock);
spin_unlock(&sb->s_root->d_inode->i_lock);
}
return 0;
@@ -126,12 +126,12 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh,
}
security_d_instantiate(ret, inode);
- spin_lock(&ret->d_lock);
+ seq_spin_lock(&ret->d_lock);
if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
ret->d_fsdata = name;
name = NULL;
}
- spin_unlock(&ret->d_lock);
+ seq_spin_unlock(&ret->d_lock);
out:
if (name)
kfree(name);
@@ -250,12 +250,12 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh,
}
security_d_instantiate(ret, inode);
- spin_lock(&ret->d_lock);
+ seq_spin_lock(&ret->d_lock);
if (IS_ROOT(ret) && !(ret->d_flags & DCACHE_NFSFS_RENAMED)) {
ret->d_fsdata = name;
name = NULL;
}
- spin_unlock(&ret->d_lock);
+ seq_spin_unlock(&ret->d_lock);
out:
if (name)
kfree(name);
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 1f063ba..4b3ffaa 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -60,7 +60,7 @@ rename_retry:
seq = read_seqbegin(&rename_lock);
rcu_read_lock();
while (1) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (IS_ROOT(dentry))
break;
namelen = dentry->d_name.len;
@@ -70,17 +70,17 @@ rename_retry:
end -= namelen;
memcpy(end, dentry->d_name.name, namelen);
*--end = '/';
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
dentry = dentry->d_parent;
}
if (read_seqretry(&rename_lock, seq)) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
goto rename_retry;
}
if (*end != '/') {
if (--buflen < 0) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
goto Elong;
}
@@ -89,7 +89,7 @@ rename_retry:
*p = end;
base = dentry->d_fsdata;
if (!base) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
WARN_ON(1);
return end;
@@ -100,17 +100,17 @@ rename_retry:
namelen--;
buflen -= namelen;
if (buflen < 0) {
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
goto Elong;
}
end -= namelen;
memcpy(end, base, namelen);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
return end;
Elong_unlock:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
rcu_read_unlock();
if (read_seqretry(&rename_lock, seq))
goto rename_retry;
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 8d6864c..5d2740d 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -155,7 +155,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n
* the sillyrename information to the aliased dentry.
*/
nfs_free_dname(data);
- spin_lock(&alias->d_lock);
+ seq_spin_lock(&alias->d_lock);
if (alias->d_inode != NULL &&
!(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
devname_garbage = alias->d_fsdata;
@@ -163,7 +163,7 @@ static int nfs_do_call_unlink(struct dentry *parent, struct inode *dir, struct n
alias->d_flags |= DCACHE_NFSFS_RENAMED;
ret = 1;
}
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
nfs_dec_sillycount(dir);
dput(alias);
/*
@@ -275,13 +275,13 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry)
data->res.dir_attr = &data->dir_attr;
status = -EBUSY;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
goto out_unlock;
dentry->d_flags |= DCACHE_NFSFS_RENAMED;
devname_garbage = dentry->d_fsdata;
dentry->d_fsdata = data;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/*
* If we'd displaced old cached devname, free it. At that
* point dentry is definitely not a root, so we won't need
@@ -291,7 +291,7 @@ nfs_async_unlink(struct inode *dir, struct dentry *dentry)
kfree(devname_garbage);
return 0;
out_unlock:
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
put_rpccred(data->cred);
out_free:
kfree(data);
@@ -313,13 +313,13 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode)
{
struct nfs_unlinkdata *data = NULL;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
dentry->d_flags &= ~DCACHE_NFSFS_RENAMED;
data = dentry->d_fsdata;
dentry->d_fsdata = NULL;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
if (data != NULL && (NFS_STALE(inode) || !nfs_call_unlink(dentry, data)))
nfs_free_unlinkdata(data);
@@ -329,17 +329,17 @@ nfs_complete_unlink(struct dentry *dentry, struct inode *inode)
static void
nfs_cancel_async_unlink(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
struct nfs_unlinkdata *data = dentry->d_fsdata;
dentry->d_flags &= ~DCACHE_NFSFS_RENAMED;
dentry->d_fsdata = NULL;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
nfs_free_unlinkdata(data);
return;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
struct nfs_renamedata {
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 546849b..e068a66 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -543,11 +543,11 @@ static int nilfs_encode_fh(struct dentry *dentry, __u32 *fh, int *lenp,
if (connectable && !S_ISDIR(inode->i_mode)) {
struct inode *parent;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
fid->parent_ino = parent->i_ino;
fid->parent_gen = parent->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
type = FILEID_NILFS_WITH_PARENT;
*lenp = NILFS_FID_SIZE_CONNECTABLE;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index 79b47cb..f3c5bd5 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -68,19 +68,19 @@ void __fsnotify_update_child_dentry_flags(struct inode *inode)
/* run all of the children of the original inode and fix their
* d_flags to indicate parental interest (their parent is the
* original inode) */
- spin_lock(&alias->d_lock);
+ seq_spin_lock(&alias->d_lock);
list_for_each_entry(child, &alias->d_subdirs, d_u.d_child) {
if (!child->d_inode)
continue;
- spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
if (watched)
child->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
else
child->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
- spin_unlock(&child->d_lock);
+ seq_spin_unlock(&child->d_lock);
}
- spin_unlock(&alias->d_lock);
+ seq_spin_unlock(&alias->d_lock);
}
spin_unlock(&inode->i_lock);
}
diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c
index e86577d..2384a34 100644
--- a/fs/notify/vfsmount_mark.c
+++ b/fs/notify/vfsmount_mark.c
@@ -35,13 +35,13 @@ void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
struct hlist_node *pos, *n;
LIST_HEAD(free_list);
- spin_lock(&mnt->mnt_root->d_lock);
+ seq_spin_lock(&mnt->mnt_root->d_lock);
hlist_for_each_entry_safe(mark, pos, n, &mnt->mnt_fsnotify_marks, m.m_list) {
list_add(&mark->m.free_m_list, &free_list);
hlist_del_init_rcu(&mark->m.m_list);
fsnotify_get_mark(mark);
}
- spin_unlock(&mnt->mnt_root->d_lock);
+ seq_spin_unlock(&mnt->mnt_root->d_lock);
list_for_each_entry_safe(mark, lmark, &free_list, m.free_m_list) {
fsnotify_destroy_mark(mark);
@@ -63,7 +63,7 @@ static void fsnotify_recalc_vfsmount_mask_locked(struct vfsmount *mnt)
struct hlist_node *pos;
__u32 new_mask = 0;
- assert_spin_locked(&mnt->mnt_root->d_lock);
+ assert_seq_spin_locked(&mnt->mnt_root->d_lock);
hlist_for_each_entry(mark, pos, &mnt->mnt_fsnotify_marks, m.m_list)
new_mask |= mark->mask;
@@ -76,9 +76,9 @@ static void fsnotify_recalc_vfsmount_mask_locked(struct vfsmount *mnt)
*/
void fsnotify_recalc_vfsmount_mask(struct vfsmount *mnt)
{
- spin_lock(&mnt->mnt_root->d_lock);
+ seq_spin_lock(&mnt->mnt_root->d_lock);
fsnotify_recalc_vfsmount_mask_locked(mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
+ seq_spin_unlock(&mnt->mnt_root->d_lock);
}
void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark)
@@ -88,14 +88,14 @@ void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark)
assert_spin_locked(&mark->lock);
assert_spin_locked(&mark->group->mark_lock);
- spin_lock(&mnt->mnt_root->d_lock);
+ seq_spin_lock(&mnt->mnt_root->d_lock);
hlist_del_init_rcu(&mark->m.m_list);
mark->m.mnt = NULL;
fsnotify_recalc_vfsmount_mask_locked(mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
+ seq_spin_unlock(&mnt->mnt_root->d_lock);
}
static struct fsnotify_mark *fsnotify_find_vfsmount_mark_locked(struct fsnotify_group *group,
@@ -104,7 +104,7 @@ static struct fsnotify_mark *fsnotify_find_vfsmount_mark_locked(struct fsnotify_
struct fsnotify_mark *mark;
struct hlist_node *pos;
- assert_spin_locked(&mnt->mnt_root->d_lock);
+ assert_seq_spin_locked(&mnt->mnt_root->d_lock);
hlist_for_each_entry(mark, pos, &mnt->mnt_fsnotify_marks, m.m_list) {
if (mark->group == group) {
@@ -124,9 +124,9 @@ struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group,
{
struct fsnotify_mark *mark;
- spin_lock(&mnt->mnt_root->d_lock);
+ seq_spin_lock(&mnt->mnt_root->d_lock);
mark = fsnotify_find_vfsmount_mark_locked(group, mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
+ seq_spin_unlock(&mnt->mnt_root->d_lock);
return mark;
}
@@ -149,7 +149,7 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
assert_spin_locked(&mark->lock);
assert_spin_locked(&group->mark_lock);
- spin_lock(&mnt->mnt_root->d_lock);
+ seq_spin_lock(&mnt->mnt_root->d_lock);
mark->m.mnt = mnt;
@@ -184,7 +184,7 @@ int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
hlist_add_after_rcu(last, &mark->m.m_list);
out:
fsnotify_recalc_vfsmount_mask_locked(mnt);
- spin_unlock(&mnt->mnt_root->d_lock);
+ seq_spin_unlock(&mnt->mnt_root->d_lock);
return ret;
}
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index e5ba348..d59a4c7 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -177,16 +177,16 @@ struct dentry *ocfs2_find_local_alias(struct inode *inode,
list_for_each(p, &inode->i_dentry) {
dentry = list_entry(p, struct dentry, d_alias);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
if (ocfs2_match_dentry(dentry, parent_blkno, skip_unhashed)) {
trace_ocfs2_find_local_alias(dentry->d_name.len,
dentry->d_name.name);
dget_dlock(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
break;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
dentry = NULL;
}
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c
index 745db42..b48fa52 100644
--- a/fs/ocfs2/export.c
+++ b/fs/ocfs2/export.c
@@ -214,7 +214,7 @@ static int ocfs2_encode_fh(struct dentry *dentry, u32 *fh_in, int *max_len,
if (connectable && !S_ISDIR(inode->i_mode)) {
struct inode *parent;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
parent = dentry->d_parent->d_inode;
blkno = OCFS2_I(parent)->ip_blkno;
@@ -224,7 +224,7 @@ static int ocfs2_encode_fh(struct dentry *dentry, u32 *fh_in, int *max_len,
fh[4] = cpu_to_le32((u32)(blkno & 0xffffffff));
fh[5] = cpu_to_le32(generation);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
len = 6;
type = 2;
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 4fd5bb3..8307f15 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1609,7 +1609,7 @@ int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
if (maxlen < 5 || !need_parent)
return 3;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
inode = dentry->d_parent->d_inode;
data[3] = inode->i_ino;
data[4] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id);
@@ -1618,7 +1618,7 @@ int reiserfs_encode_fh(struct dentry *dentry, __u32 * data, int *lenp,
data[5] = inode->i_generation;
*lenp = 6;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return *lenp;
}
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index f1dce84..e2487a0 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -1300,13 +1300,13 @@ static int udf_encode_fh(struct dentry *de, __u32 *fh, int *lenp,
fid->udf.generation = inode->i_generation;
if (connectable && !S_ISDIR(inode->i_mode)) {
- spin_lock(&de->d_lock);
+ seq_spin_lock(&de->d_lock);
inode = de->d_parent->d_inode;
location = UDF_I(inode)->i_location;
fid->udf.parent_block = location.logicalBlockNum;
fid->udf.parent_partref = location.partitionReferenceNum;
fid->udf.parent_generation = inode->i_generation;
- spin_unlock(&de->d_lock);
+ seq_spin_unlock(&de->d_lock);
*lenp = 5;
type = FILEID_UDF_WITH_PARENT;
}
diff --git a/fs/xfs/linux-2.6/xfs_export.c b/fs/xfs/linux-2.6/xfs_export.c
index fed3f3c..0470488 100644
--- a/fs/xfs/linux-2.6/xfs_export.c
+++ b/fs/xfs/linux-2.6/xfs_export.c
@@ -97,20 +97,20 @@ xfs_fs_encode_fh(
switch (fileid_type) {
case FILEID_INO32_GEN_PARENT:
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
fid->i32.parent_ino = XFS_I(dentry->d_parent->d_inode)->i_ino;
fid->i32.parent_gen = dentry->d_parent->d_inode->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/*FALLTHRU*/
case FILEID_INO32_GEN:
fid->i32.ino = XFS_I(inode)->i_ino;
fid->i32.gen = inode->i_generation;
break;
case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG:
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
fid64->parent_ino = XFS_I(dentry->d_parent->d_inode)->i_ino;
fid64->parent_gen = dentry->d_parent->d_inode->i_generation;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
/*FALLTHRU*/
case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG:
fid64->ino = XFS_I(inode)->i_ino;
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index f13bb6d..92e23a0 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -116,7 +116,7 @@ full_name_hash(const unsigned char *name, unsigned int len)
struct dentry {
/* RCU lookup touched fields */
unsigned int d_flags; /* protected by d_lock */
- seqcount_t d_seq; /* per dentry seqlock */
+ seqlock_t d_lock; /* per dentry seqlock */
struct hlist_bl_node d_hash; /* lookup hash list */
struct dentry *d_parent; /* parent directory */
struct qstr d_name;
@@ -126,7 +126,6 @@ struct dentry {
/* Ref lookup also touches following */
unsigned int d_count; /* protected by d_lock */
- spinlock_t d_lock; /* per dentry lock */
const struct dentry_operations *d_op;
struct super_block *d_sb; /* The root of the dentry tree */
unsigned long d_time; /* used by d_revalidate */
@@ -324,8 +323,8 @@ static inline int __d_rcu_to_refcount(struct dentry *dentry, unsigned seq)
{
int ret = 0;
- assert_spin_locked(&dentry->d_lock);
- if (!read_seqcount_retry(&dentry->d_seq, seq)) {
+ assert_seq_spin_locked(&dentry->d_lock);
+ if (!read_seqretry(&dentry->d_lock, seq)) {
ret = 1;
dentry->d_count++;
}
@@ -368,9 +367,9 @@ static inline struct dentry *dget_dlock(struct dentry *dentry)
static inline struct dentry *dget(struct dentry *dentry)
{
if (dentry) {
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dget_dlock(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
return dentry;
}
@@ -401,9 +400,9 @@ static inline int cant_mount(struct dentry *dentry)
static inline void dont_mount(struct dentry *dentry)
{
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
dentry->d_flags |= DCACHE_CANT_MOUNT;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
extern void dput(struct dentry *);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 223bdde..c7984a5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -876,9 +876,11 @@ static inline loff_t i_size_read(const struct inode *inode)
static inline void i_size_write(struct inode *inode, loff_t i_size)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ preempt_disable_rt();
write_seqcount_begin(&inode->i_size_seqcount);
inode->i_size = i_size;
write_seqcount_end(&inode->i_size_seqcount);
+ preempt_enable_rt();
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
preempt_disable();
inode->i_size = i_size;
@@ -2500,9 +2502,9 @@ static inline ino_t parent_ino(struct dentry *dentry)
* Don't strictly need d_lock here? If the parent ino could change
* then surely we'd have a deeper race in the caller?
*/
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
res = dentry->d_parent->d_inode->i_ino;
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
return res;
}
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index 003dc0f..f748403 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -2,13 +2,11 @@
#define _LINUX_FS_STRUCT_H
#include <linux/path.h>
-#include <linux/spinlock.h>
#include <linux/seqlock.h>
struct fs_struct {
int users;
- spinlock_t lock;
- seqcount_t seq;
+ seqlock_t lock;
int umask;
int in_exec;
struct path root, pwd;
@@ -26,29 +24,29 @@ extern int unshare_fs_struct(void);
static inline void get_fs_root(struct fs_struct *fs, struct path *root)
{
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
*root = fs->root;
path_get(root);
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
}
static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
{
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
*pwd = fs->pwd;
path_get(pwd);
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
}
static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root,
struct path *pwd)
{
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
*root = fs->root;
path_get(root);
*pwd = fs->pwd;
path_get(pwd);
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
}
#endif /* _LINUX_FS_STRUCT_H */
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 69ad89b..82d6939 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -329,7 +329,7 @@ static inline void __fsnotify_update_dcache_flags(struct dentry *dentry)
{
struct dentry *parent;
- assert_spin_locked(&dentry->d_lock);
+ assert_seq_spin_locked(&dentry->d_lock);
/*
* Serialisation of setting PARENT_WATCHED on the dentries is provided
@@ -353,9 +353,9 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode
if (!inode)
return;
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
__fsnotify_update_dcache_flags(dentry);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/* called from fsnotify listeners, such as fanotify or dnotify */
diff --git a/include/linux/lglock.h b/include/linux/lglock.h
index d8acbcc..9cfab36 100644
--- a/include/linux/lglock.h
+++ b/include/linux/lglock.h
@@ -204,9 +204,31 @@
#else /* !PREEMPT_RT_FULL */
#define DEFINE_LGLOCK(name) \
\
- DEFINE_PER_CPU(struct rt_mutex, name##_lock); \
+ DEFINE_PER_CPU(struct rt_mutex, name##_lock); \
+ DEFINE_SPINLOCK(name##_cpu_lock); \
+ cpumask_t name##_cpus __read_mostly; \
DEFINE_LGLOCK_LOCKDEP(name); \
\
+ static int \
+ name##_lg_cpu_callback(struct notifier_block *nb, \
+ unsigned long action, void *hcpu) \
+ { \
+ switch (action & ~CPU_TASKS_FROZEN) { \
+ case CPU_UP_PREPARE: \
+ spin_lock(&name##_cpu_lock); \
+ cpu_set((unsigned long)hcpu, name##_cpus); \
+ spin_unlock(&name##_cpu_lock); \
+ break; \
+ case CPU_UP_CANCELED: case CPU_DEAD: \
+ spin_lock(&name##_cpu_lock); \
+ cpu_clear((unsigned long)hcpu, name##_cpus); \
+ spin_unlock(&name##_cpu_lock); \
+ } \
+ return NOTIFY_OK; \
+ } \
+ static struct notifier_block name##_lg_cpu_notifier = { \
+ .notifier_call = name##_lg_cpu_callback, \
+ }; \
void name##_lock_init(void) { \
int i; \
LOCKDEP_INIT_MAP(&name##_lock_dep_map, #name, &name##_lock_key, 0); \
@@ -215,6 +237,11 @@
lock = &per_cpu(name##_lock, i); \
rt_mutex_init(lock); \
} \
+ register_hotcpu_notifier(&name##_lg_cpu_notifier); \
+ get_online_cpus(); \
+ for_each_online_cpu(i) \
+ cpu_set(i, name##_cpus); \
+ put_online_cpus(); \
} \
EXPORT_SYMBOL(name##_lock_init); \
\
@@ -255,7 +282,8 @@
void name##_global_lock_online(void) { \
int i; \
rwlock_acquire(&name##_lock_dep_map, 0, 0, _RET_IP_); \
- for_each_online_cpu(i) { \
+ spin_lock(&name##_cpu_lock); \
+ for_each_cpu(i, &name##_cpus) { \
struct rt_mutex *lock; \
lock = &per_cpu(name##_lock, i); \
__rt_spin_lock(lock); \
@@ -266,11 +294,12 @@
void name##_global_unlock_online(void) { \
int i; \
rwlock_release(&name##_lock_dep_map, 1, _RET_IP_); \
- for_each_online_cpu(i) { \
+ for_each_cpu(i, &name##_cpus) { \
struct rt_mutex *lock; \
lock = &per_cpu(name##_lock, i); \
__rt_spin_unlock(lock); \
} \
+ spin_unlock(&name##_cpu_lock); \
} \
EXPORT_SYMBOL(name##_global_unlock_online); \
\
diff --git a/include/linux/seccomp.h b/include/linux/seccomp.h
index 167c333..cc7a4e9 100644
--- a/include/linux/seccomp.h
+++ b/include/linux/seccomp.h
@@ -19,6 +19,11 @@ static inline void secure_computing(int this_syscall)
extern long prctl_get_seccomp(void);
extern long prctl_set_seccomp(unsigned long);
+static inline int seccomp_mode(seccomp_t *s)
+{
+ return s->mode;
+}
+
#else /* CONFIG_SECCOMP */
#include <linux/errno.h>
@@ -37,6 +42,11 @@ static inline long prctl_set_seccomp(unsigned long arg2)
return -EINVAL;
}
+static inline int seccomp_mode(seccomp_t *s)
+{
+ return 0;
+}
+
#endif /* CONFIG_SECCOMP */
#endif /* _LINUX_SECCOMP_H */
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index e262353..29ffd4f 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -152,11 +152,6 @@ static inline void write_seqcount_barrier(seqcount_t *s)
typedef struct {
struct seqcount seqcount;
- raw_spinlock_t lock;
-} raw_seqlock_t;
-
-typedef struct {
- struct seqcount seqcount;
spinlock_t lock;
} seqlock_t;
@@ -164,21 +159,6 @@ typedef struct {
* These macros triggered gcc-3.x compile-time problems. We think these are
* OK now. Be cautious.
*/
-#define __RAW_SEQLOCK_UNLOCKED(lockname) \
- { \
- .seqcount = SEQCNT_ZERO, \
- .lock = __RAW_SPIN_LOCK_UNLOCKED(lockname) \
- }
-
-#define raw_seqlock_init(x) \
- do { \
- seqcount_init(&(x)->seqcount); \
- raw_spin_lock_init(&(x)->lock); \
- } while (0)
-
-#define DEFINE_RAW_SEQLOCK(x) \
- raw_seqlock_t x = __RAW_SEQLOCK_UNLOCKED(x)
-
#define __SEQLOCK_UNLOCKED(lockname) \
{ \
.seqcount = SEQCNT_ZERO, \
@@ -194,57 +174,60 @@ typedef struct {
#define DEFINE_SEQLOCK(x) \
seqlock_t x = __SEQLOCK_UNLOCKED(x)
-#define read_seqbegin(sl) read_seqcount_begin(&(sl)->seqcount)
-#define read_seqretry(sl, start) read_seqcount_retry(&(sl)->seqcount, start)
-
/*
- * Lock out other writers and update the count.
- * Acts like a normal spin_lock/unlock.
- * Don't need preempt_disable() because that is in the spin_lock already.
+ * Read side functions for starting and finalizing a read side section.
*/
-static inline void raw_write_seqlock(raw_seqlock_t *sl)
+#ifndef CONFIG_PREEMPT_RT_FULL
+static inline unsigned read_seqbegin(const seqlock_t *sl)
{
- raw_spin_lock(&sl->lock);
- write_seqcount_begin(&sl->seqcount);
+ return read_seqcount_begin(&sl->seqcount);
}
-
-static inline void raw_write_sequnlock(raw_seqlock_t *sl)
+#else
+/*
+ * Starvation safe read side for RT
+ */
+static inline unsigned read_seqbegin(seqlock_t *sl)
{
- write_seqcount_end(&sl->seqcount);
- raw_spin_unlock(&sl->lock);
-}
+ unsigned ret;
-static inline void raw_write_seqlock_irq(raw_seqlock_t *sl)
-{
- raw_spin_lock_irq(&sl->lock);
- write_seqcount_begin(&sl->seqcount);
+repeat:
+ ret = sl->seqcount.sequence;
+ if (unlikely(ret & 1)) {
+ /*
+ * Take the lock and let the writer proceed (i.e. evtl
+ * boost it), otherwise we could loop here forever.
+ */
+ spin_lock(&sl->lock);
+ spin_unlock(&sl->lock);
+ goto repeat;
+ }
+ return ret;
}
+#endif
-static inline void raw_write_sequnlock_irq(raw_seqlock_t *sl)
+static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start)
{
- write_seqcount_end(&sl->seqcount);
- raw_spin_unlock_irq(&sl->lock);
+ return read_seqcount_retry(&sl->seqcount, start);
}
-static inline unsigned long __raw_write_seqlock_irqsave(raw_seqlock_t *sl)
+/*
+ * Ditto w/o barriers
+ */
+static inline unsigned __read_seqbegin(const seqlock_t *sl)
{
- unsigned long flags;
-
- raw_spin_lock_irqsave(&sl->lock, flags);
- write_seqcount_begin(&sl->seqcount);
- return flags;
+ return __read_seqcount_begin(&sl->seqcount);
}
-#define raw_write_seqlock_irqsave(lock, flags) \
- do { flags = __raw_write_seqlock_irqsave(lock); } while (0)
-
-static inline void
-raw_write_sequnlock_irqrestore(raw_seqlock_t *sl, unsigned long flags)
+static inline unsigned __read_seqretry(const seqlock_t *sl, unsigned start)
{
- write_seqcount_end(&sl->seqcount);
- raw_spin_unlock_irqrestore(&sl->lock, flags);
+ return __read_seqcount_retry(&sl->seqcount, start);
}
+/*
+ * Lock out other writers and update the count.
+ * Acts like a normal spin_lock/unlock.
+ * Don't need preempt_disable() because that is in the spin_lock already.
+ */
static inline void write_seqlock(seqlock_t *sl)
{
spin_lock(&sl->lock);
@@ -300,4 +283,55 @@ write_sequnlock_irqrestore(seqlock_t *sl, unsigned long flags)
spin_unlock_irqrestore(&sl->lock, flags);
}
+/*
+ * Instead of open coding a spinlock and a seqcount, the following
+ * functions allow to serialize on the seqlock w/o touching seqcount.
+ */
+static inline void seq_spin_lock(seqlock_t *sl)
+{
+ spin_lock(&sl->lock);
+}
+
+static inline int seq_spin_trylock(seqlock_t *sl)
+{
+ return spin_trylock(&sl->lock);
+}
+
+static inline void seq_spin_unlock(seqlock_t *sl)
+{
+ spin_unlock(&sl->lock);
+}
+
+static inline void assert_seq_spin_locked(seqlock_t *sl)
+{
+ assert_spin_locked(&sl->lock);
+}
+
+static inline void seq_spin_lock_nested(seqlock_t *sl, int subclass)
+{
+ spin_lock_nested(&sl->lock, subclass);
+}
+
+/*
+ * For writers which need to take/release the lock w/o updating seqcount for
+ * whatever reasons the following functions allow to update the count
+ * after the lock has been acquired or before it is released.
+ */
+static inline void write_seqlock_begin(seqlock_t *sl)
+{
+ assert_spin_locked(&sl->lock);
+ write_seqcount_begin(&sl->seqcount);
+}
+
+static inline void write_seqlock_end(seqlock_t *sl)
+{
+ assert_spin_locked(&sl->lock);
+ write_seqcount_end(&sl->seqcount);
+}
+
+static inline void write_seqlock_barrier(seqlock_t *sl)
+{
+ write_seqcount_barrier(&sl->seqcount);
+}
+
#endif /* __LINUX_SEQLOCK_H */
diff --git a/include/linux/u64_stats_sync.h b/include/linux/u64_stats_sync.h
index 8da8c4e..b39549f 100644
--- a/include/linux/u64_stats_sync.h
+++ b/include/linux/u64_stats_sync.h
@@ -70,6 +70,7 @@ struct u64_stats_sync {
static inline void u64_stats_update_begin(struct u64_stats_sync *syncp)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ preempt_disable_rt();
write_seqcount_begin(&syncp->seq);
#endif
}
@@ -78,6 +79,7 @@ static inline void u64_stats_update_end(struct u64_stats_sync *syncp)
{
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
write_seqcount_end(&syncp->seq);
+ preempt_enable_rt();
#endif
}
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 4014b62..9c1cb97 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -377,7 +377,7 @@ struct neighbour_cb {
#define NEIGH_CB(skb) ((struct neighbour_cb *)(skb)->cb)
-static inline void neigh_ha_snapshot(char *dst, const struct neighbour *n,
+static inline void neigh_ha_snapshot(char *dst, struct neighbour *n,
const struct net_device *dev)
{
unsigned int seq;
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index feb47ec..761816c 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -868,29 +868,29 @@ static void cgroup_clear_directory(struct dentry *dentry)
struct list_head *node;
BUG_ON(!mutex_is_locked(&dentry->d_inode->i_mutex));
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
node = dentry->d_subdirs.next;
while (node != &dentry->d_subdirs) {
struct dentry *d = list_entry(node, struct dentry, d_u.d_child);
- spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(node);
if (d->d_inode) {
/* This should never be called on a cgroup
* directory with child cgroups */
BUG_ON(d->d_inode->i_mode & S_IFDIR);
dget_dlock(d);
- spin_unlock(&d->d_lock);
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&d->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
d_delete(d);
simple_unlink(dentry->d_inode, d);
dput(d);
- spin_lock(&dentry->d_lock);
+ seq_spin_lock(&dentry->d_lock);
} else
- spin_unlock(&d->d_lock);
+ seq_spin_unlock(&d->d_lock);
node = dentry->d_subdirs.next;
}
- spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
}
/*
@@ -903,11 +903,11 @@ static void cgroup_d_remove_dir(struct dentry *dentry)
cgroup_clear_directory(dentry);
parent = dentry->d_parent;
- spin_lock(&parent->d_lock);
- spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock(&parent->d_lock);
+ seq_spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(&dentry->d_u.d_child);
- spin_unlock(&dentry->d_lock);
- spin_unlock(&parent->d_lock);
+ seq_spin_unlock(&dentry->d_lock);
+ seq_spin_unlock(&parent->d_lock);
remove_dir(dentry);
}
diff --git a/kernel/cpu.c b/kernel/cpu.c
index b2de274..21c8380 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -46,7 +46,12 @@ static int cpu_hotplug_disabled;
static struct {
struct task_struct *active_writer;
+#ifdef CONFIG_PREEMPT_RT_FULL
+ /* Makes the lock keep the task's state */
+ spinlock_t lock;
+#else
struct mutex lock; /* Synchronizes accesses to refcount, */
+#endif
/*
* Also blocks the new readers during
* an ongoing cpu hotplug operation.
@@ -54,10 +59,22 @@ static struct {
int refcount;
} cpu_hotplug = {
.active_writer = NULL,
+#ifdef CONFIG_PREEMPT_RT_FULL
+ .lock = __SPIN_LOCK_UNLOCKED(cpu_hotplug.lock),
+#else
.lock = __MUTEX_INITIALIZER(cpu_hotplug.lock),
+#endif
.refcount = 0,
};
+#ifdef CONFIG_PREEMPT_RT_FULL
+# define hotplug_lock() rt_spin_lock(&cpu_hotplug.lock)
+# define hotplug_unlock() rt_spin_unlock(&cpu_hotplug.lock)
+#else
+# define hotplug_lock() mutex_lock(&cpu_hotplug.lock)
+# define hotplug_unlock() mutex_unlock(&cpu_hotplug.lock)
+#endif
+
struct hotplug_pcp {
struct task_struct *unplug;
int refcount;
@@ -87,8 +104,8 @@ retry:
return;
}
preempt_enable();
- mutex_lock(&cpu_hotplug.lock);
- mutex_unlock(&cpu_hotplug.lock);
+ hotplug_lock();
+ hotplug_unlock();
preempt_disable();
goto retry;
}
@@ -161,9 +178,9 @@ void get_online_cpus(void)
might_sleep();
if (cpu_hotplug.active_writer == current)
return;
- mutex_lock(&cpu_hotplug.lock);
+ hotplug_lock();
cpu_hotplug.refcount++;
- mutex_unlock(&cpu_hotplug.lock);
+ hotplug_unlock();
}
EXPORT_SYMBOL_GPL(get_online_cpus);
@@ -172,10 +189,10 @@ void put_online_cpus(void)
{
if (cpu_hotplug.active_writer == current)
return;
- mutex_lock(&cpu_hotplug.lock);
+ hotplug_lock();
if (!--cpu_hotplug.refcount && unlikely(cpu_hotplug.active_writer))
wake_up_process(cpu_hotplug.active_writer);
- mutex_unlock(&cpu_hotplug.lock);
+ hotplug_unlock();
}
EXPORT_SYMBOL_GPL(put_online_cpus);
@@ -207,11 +224,11 @@ static void cpu_hotplug_begin(void)
cpu_hotplug.active_writer = current;
for (;;) {
- mutex_lock(&cpu_hotplug.lock);
+ hotplug_lock();
if (likely(!cpu_hotplug.refcount))
break;
__set_current_state(TASK_UNINTERRUPTIBLE);
- mutex_unlock(&cpu_hotplug.lock);
+ hotplug_unlock();
schedule();
}
}
@@ -219,7 +236,7 @@ static void cpu_hotplug_begin(void)
static void cpu_hotplug_done(void)
{
cpu_hotplug.active_writer = NULL;
- mutex_unlock(&cpu_hotplug.lock);
+ hotplug_unlock();
}
#else /* #if CONFIG_HOTPLUG_CPU */
diff --git a/kernel/fork.c b/kernel/fork.c
index 0429130..1643f63 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -856,13 +856,13 @@ static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)
struct fs_struct *fs = current->fs;
if (clone_flags & CLONE_FS) {
/* tsk->fs is already what we want */
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
if (fs->in_exec) {
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
return -EAGAIN;
}
fs->users++;
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
return 0;
}
tsk->fs = copy_fs_struct(fs);
@@ -1729,13 +1729,13 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
if (new_fs) {
fs = current->fs;
- spin_lock(&fs->lock);
+ seq_spin_lock(&fs->lock);
current->fs = new_fs;
if (--fs->users)
new_fs = NULL;
else
new_fs = fs;
- spin_unlock(&fs->lock);
+ seq_spin_unlock(&fs->lock);
}
if (new_fd) {
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 789744a..a02fbd9 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -1365,14 +1365,14 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
* PI_REQUEUE_INPROGRESS, so that if the task is waking up
* it will know that we are in the process of requeuing it.
*/
- raw_spin_lock(&task->pi_lock);
+ raw_spin_lock_irq(&task->pi_lock);
if (task->pi_blocked_on) {
- raw_spin_unlock(&task->pi_lock);
+ raw_spin_unlock_irq(&task->pi_lock);
raw_spin_unlock(&lock->wait_lock);
return -EAGAIN;
}
task->pi_blocked_on = PI_REQUEUE_INPROGRESS;
- raw_spin_unlock(&task->pi_lock);
+ raw_spin_unlock_irq(&task->pi_lock);
#endif
ret = task_blocks_on_rt_mutex(lock, waiter, task, detect_deadlock);
diff --git a/kernel/sched.c b/kernel/sched.c
index e5ef7a8..df30481 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2284,7 +2284,8 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
* is actually now running somewhere else!
*/
while (task_running(rq, p)) {
- if (match_state && unlikely(p->state != match_state))
+ if (match_state && unlikely(p->state != match_state)
+ && unlikely(p->saved_state != match_state))
return 0;
cpu_relax();
}
@@ -2299,7 +2300,8 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
running = task_running(rq, p);
on_rq = p->on_rq;
ncsw = 0;
- if (!match_state || p->state == match_state)
+ if (!match_state || p->state == match_state
+ || p->saved_state == match_state)
ncsw = p->nvcsw | LONG_MIN; /* sets MSB */
task_rq_unlock(rq, p, &flags);
diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
index a470154..21940eb 100644
--- a/kernel/time/jiffies.c
+++ b/kernel/time/jiffies.c
@@ -74,9 +74,9 @@ u64 get_jiffies_64(void)
u64 ret;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
ret = jiffies_64;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
return ret;
}
EXPORT_SYMBOL(get_jiffies_64);
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index b510ba9..c465e88 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -358,7 +358,8 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
{
enum hrtimer_restart res = HRTIMER_NORESTART;
- raw_write_seqlock(&xtime_lock);
+ raw_spin_lock(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
switch (time_state) {
case TIME_OK:
@@ -388,7 +389,8 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
break;
}
- raw_write_sequnlock(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock(&xtime_lock);
return res;
}
@@ -663,7 +665,8 @@ int do_adjtimex(struct timex *txc)
getnstimeofday(&ts);
- raw_write_seqlock_irq(&xtime_lock);
+ raw_spin_lock_irq(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
if (txc->modes & ADJ_ADJTIME) {
long save_adjust = time_adjust;
@@ -705,7 +708,8 @@ int do_adjtimex(struct timex *txc)
/* fill PPS status fields */
pps_fill_timex(txc);
- raw_write_sequnlock_irq(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irq(&xtime_lock);
txc->time.tv_sec = ts.tv_sec;
txc->time.tv_usec = ts.tv_nsec;
@@ -903,7 +907,8 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
pts_norm = pps_normalize_ts(*phase_ts);
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
/* clear the error bits, they will be set again if needed */
time_status &= ~(STA_PPSJITTER | STA_PPSWANDER | STA_PPSERROR);
@@ -916,7 +921,8 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
* just start the frequency interval */
if (unlikely(pps_fbase.tv_sec == 0)) {
pps_fbase = *raw_ts;
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
return;
}
@@ -931,7 +937,8 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
time_status |= STA_PPSJITTER;
/* restart the frequency calibration interval */
pps_fbase = *raw_ts;
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
pr_err("hardpps: PPSJITTER: bad pulse\n");
return;
}
@@ -948,7 +955,8 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
hardpps_update_phase(pts_norm.nsec);
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
}
EXPORT_SYMBOL(hardpps);
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index 174dba1..25fb6ad 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -63,13 +63,15 @@ int tick_is_oneshot_available(void)
static void tick_periodic(int cpu)
{
if (tick_do_timer_cpu == cpu) {
- raw_write_seqlock(&xtime_lock);
+ raw_spin_lock(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
/* Keep track of the next tick event */
tick_next_period = ktime_add(tick_next_period, tick_period);
do_timer(1);
- raw_write_sequnlock(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock(&xtime_lock);
}
update_process_times(user_mode(get_irq_regs()));
@@ -130,9 +132,9 @@ void tick_setup_periodic(struct clock_event_device *dev, int broadcast)
ktime_t next;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
next = tick_next_period;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
clockevents_set_mode(dev, CLOCK_EVT_MODE_ONESHOT);
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index dbda970..116e861 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -143,4 +143,5 @@ static inline int tick_device_is_functional(struct clock_event_device *dev)
#endif
extern void do_timer(unsigned long ticks);
-extern raw_seqlock_t xtime_lock;
+extern raw_spinlock_t xtime_lock;
+extern seqcount_t xtime_seq;
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 411fabc..5f620b0 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -56,7 +56,8 @@ static void tick_do_update_jiffies64(ktime_t now)
return;
/* Reevalute with xtime_lock held */
- raw_write_seqlock(&xtime_lock);
+ raw_spin_lock(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
delta = ktime_sub(now, last_jiffies_update);
if (delta.tv64 >= tick_period.tv64) {
@@ -79,7 +80,8 @@ static void tick_do_update_jiffies64(ktime_t now)
/* Keep the tick_next_period variable up to date */
tick_next_period = ktime_add(last_jiffies_update, tick_period);
}
- raw_write_sequnlock(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock(&xtime_lock);
}
/*
@@ -89,12 +91,14 @@ static ktime_t tick_init_jiffy_update(void)
{
ktime_t period;
- raw_write_seqlock(&xtime_lock);
+ raw_spin_lock(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
/* Did we start the jiffies update yet ? */
if (last_jiffies_update.tv64 == 0)
last_jiffies_update = tick_next_period;
period = last_jiffies_update;
- raw_write_sequnlock(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock(&xtime_lock);
return period;
}
@@ -311,11 +315,11 @@ void tick_nohz_stop_sched_tick(int inidle)
ts->idle_calls++;
/* Read jiffies and the time when jiffies were updated last */
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
last_update = last_jiffies_update;
last_jiffies = jiffies;
time_delta = timekeeping_max_deferment();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
if (rcu_needs_cpu(cpu) || printk_needs_cpu(cpu) ||
arch_needs_cpu(cpu)) {
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d040f93..6ac6438 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -139,7 +139,8 @@ static inline s64 timekeeping_get_ns_raw(void)
* This read-write spinlock protects us from races in SMP while
* playing with xtime.
*/
-__cacheline_aligned_in_smp DEFINE_RAW_SEQLOCK(xtime_lock);
+__cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(xtime_lock);
+seqcount_t xtime_seq;
/*
* The current time
@@ -221,7 +222,7 @@ void getnstimeofday(struct timespec *ts)
WARN_ON(timekeeping_suspended);
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
*ts = xtime;
nsecs = timekeeping_get_ns();
@@ -229,7 +230,7 @@ void getnstimeofday(struct timespec *ts)
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
timespec_add_ns(ts, nsecs);
}
@@ -244,14 +245,14 @@ ktime_t ktime_get(void)
WARN_ON(timekeeping_suspended);
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
secs = xtime.tv_sec + wall_to_monotonic.tv_sec;
nsecs = xtime.tv_nsec + wall_to_monotonic.tv_nsec;
nsecs += timekeeping_get_ns();
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
/*
* Use ktime_set/ktime_add_ns to create a proper ktime on
* 32-bit architectures without CONFIG_KTIME_SCALAR.
@@ -277,14 +278,14 @@ void ktime_get_ts(struct timespec *ts)
WARN_ON(timekeeping_suspended);
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
*ts = xtime;
tomono = wall_to_monotonic;
nsecs = timekeeping_get_ns();
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec,
ts->tv_nsec + tomono.tv_nsec + nsecs);
@@ -312,7 +313,7 @@ void getnstime_raw_and_real(struct timespec *ts_raw, struct timespec *ts_real)
do {
u32 arch_offset;
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
*ts_raw = raw_time;
*ts_real = xtime;
@@ -325,7 +326,7 @@ void getnstime_raw_and_real(struct timespec *ts_raw, struct timespec *ts_real)
nsecs_raw += arch_offset;
nsecs_real += arch_offset;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
timespec_add_ns(ts_raw, nsecs_raw);
timespec_add_ns(ts_real, nsecs_real);
@@ -364,7 +365,8 @@ int do_settimeofday(const struct timespec *tv)
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
timekeeping_forward_now();
@@ -380,7 +382,8 @@ int do_settimeofday(const struct timespec *tv)
update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
timekeeper.mult);
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
/* signal hrtimers about time change */
clock_was_set();
@@ -404,7 +407,8 @@ int timekeeping_inject_offset(struct timespec *ts)
if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
timekeeping_forward_now();
@@ -417,7 +421,8 @@ int timekeeping_inject_offset(struct timespec *ts)
update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
timekeeper.mult);
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
/* signal hrtimers about time change */
clock_was_set();
@@ -489,11 +494,11 @@ void getrawmonotonic(struct timespec *ts)
s64 nsecs;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
nsecs = timekeeping_get_ns_raw();
*ts = raw_time;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
timespec_add_ns(ts, nsecs);
}
@@ -509,11 +514,11 @@ int timekeeping_valid_for_hres(void)
int ret;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
ret = timekeeper.clock->flags & CLOCK_SOURCE_VALID_FOR_HRES;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
return ret;
}
@@ -571,7 +576,8 @@ void __init timekeeping_init(void)
read_persistent_clock(&now);
read_boot_clock(&boot);
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
ntp_init();
@@ -592,7 +598,8 @@ void __init timekeeping_init(void)
-boot.tv_sec, -boot.tv_nsec);
total_sleep_time.tv_sec = 0;
total_sleep_time.tv_nsec = 0;
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
}
/* time in seconds when suspend began */
@@ -633,7 +640,8 @@ void timekeeping_inject_sleeptime(struct timespec *delta)
if (!(ts.tv_sec == 0 && ts.tv_nsec == 0))
return;
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
timekeeping_forward_now();
__timekeeping_inject_sleeptime(delta);
@@ -643,7 +651,8 @@ void timekeeping_inject_sleeptime(struct timespec *delta)
update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
timekeeper.mult);
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
/* signal hrtimers about time change */
clock_was_set();
@@ -666,7 +675,8 @@ static void timekeeping_resume(void)
clocksource_resume();
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
if (timespec_compare(&ts, &timekeeping_suspend_time) > 0) {
ts = timespec_sub(ts, timekeeping_suspend_time);
@@ -676,7 +686,8 @@ static void timekeeping_resume(void)
timekeeper.clock->cycle_last = timekeeper.clock->read(timekeeper.clock);
timekeeper.ntp_error = 0;
timekeeping_suspended = 0;
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
touch_softlockup_watchdog();
@@ -692,10 +703,12 @@ static int timekeeping_suspend(void)
read_persistent_clock(&timekeeping_suspend_time);
- raw_write_seqlock_irqsave(&xtime_lock, flags);
+ raw_spin_lock_irqsave(&xtime_lock, flags);
+ write_seqcount_begin(&xtime_seq);
timekeeping_forward_now();
timekeeping_suspended = 1;
- raw_write_sequnlock_irqrestore(&xtime_lock, flags);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock_irqrestore(&xtime_lock, flags);
clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL);
clocksource_suspend();
@@ -986,13 +999,13 @@ void get_monotonic_boottime(struct timespec *ts)
WARN_ON(timekeeping_suspended);
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
*ts = xtime;
tomono = wall_to_monotonic;
sleep = total_sleep_time;
nsecs = timekeeping_get_ns();
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec,
ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs);
@@ -1043,10 +1056,10 @@ struct timespec current_kernel_time(void)
unsigned long seq;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
now = xtime;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
return now;
}
@@ -1058,11 +1071,11 @@ struct timespec get_monotonic_coarse(void)
unsigned long seq;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
now = xtime;
mono = wall_to_monotonic;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
set_normalized_timespec(&now, now.tv_sec + mono.tv_sec,
now.tv_nsec + mono.tv_nsec);
@@ -1094,11 +1107,11 @@ void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
unsigned long seq;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
*xtim = xtime;
*wtom = wall_to_monotonic;
*sleep = total_sleep_time;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
}
/**
@@ -1110,9 +1123,9 @@ ktime_t ktime_get_monotonic_offset(void)
struct timespec wtom;
do {
- seq = read_seqbegin(&xtime_lock);
+ seq = read_seqcount_begin(&xtime_seq);
wtom = wall_to_monotonic;
- } while (read_seqretry(&xtime_lock, seq));
+ } while (read_seqcount_retry(&xtime_seq, seq));
return timespec_to_ktime(wtom);
}
@@ -1124,7 +1137,9 @@ ktime_t ktime_get_monotonic_offset(void)
*/
void xtime_update(unsigned long ticks)
{
- raw_write_seqlock(&xtime_lock);
+ raw_spin_lock(&xtime_lock);
+ write_seqcount_begin(&xtime_seq);
do_timer(ticks);
- raw_write_sequnlock(&xtime_lock);
+ write_seqcount_end(&xtime_seq);
+ raw_spin_unlock(&xtime_lock);
}
diff --git a/kernel/timer.c b/kernel/timer.c
index 937799f..a319c6a 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1743,21 +1743,17 @@ static void __cpuinit migrate_timers(int cpu)
{
struct tvec_base *old_base;
struct tvec_base *new_base;
- unsigned long flags;
int i;
BUG_ON(cpu_online(cpu));
old_base = per_cpu(tvec_bases, cpu);
- new_base = get_cpu_var(tvec_bases);
+ new_base = get_local_var(tvec_bases);
/*
* The caller is globally serialized and nobody else
* takes two locks at once, deadlock is not possible.
*/
- local_irq_save(flags);
- while (!spin_trylock(&new_base->lock))
- cpu_relax();
- while (!spin_trylock(&old_base->lock))
- cpu_relax();
+ spin_lock_irq(&new_base->lock);
+ spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
BUG_ON(old_base->running_timer);
@@ -1771,10 +1767,8 @@ static void __cpuinit migrate_timers(int cpu)
}
spin_unlock(&old_base->lock);
- spin_unlock(&new_base->lock);
- local_irq_restore(flags);
-
- put_cpu_var(tvec_bases);
+ spin_unlock_irq(&new_base->lock);
+ put_local_var(tvec_bases);
}
#endif /* CONFIG_HOTPLUG_CPU */
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 2467714..2ffbb9d 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -1045,7 +1045,7 @@ static inline int ok_to_lock(void)
if (in_nmi())
return 0;
#ifdef CONFIG_PREEMPT_RT_FULL
- if (in_atomic())
+ if (in_atomic() || irqs_disabled())
return 0;
#endif
return 1;
diff --git a/localversion-rt b/localversion-rt
index 49bae8d..5498386 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt38
+-rt39
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 72bc536..aeb9960 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -377,14 +377,14 @@ rpc_info_open(struct inode *inode, struct file *file)
if (!ret) {
struct seq_file *m = file->private_data;
- spin_lock(&file->f_path.dentry->d_lock);
+ seq_spin_lock(&file->f_path.dentry->d_lock);
if (!d_unhashed(file->f_path.dentry))
clnt = RPC_I(inode)->private;
if (clnt != NULL && atomic_inc_not_zero(&clnt->cl_count)) {
- spin_unlock(&file->f_path.dentry->d_lock);
+ seq_spin_unlock(&file->f_path.dentry->d_lock);
m->private = clnt;
} else {
- spin_unlock(&file->f_path.dentry->d_lock);
+ seq_spin_unlock(&file->f_path.dentry->d_lock);
single_release(inode, file);
ret = -EINVAL;
}
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 3545934..f188c79 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1197,28 +1197,28 @@ static void sel_remove_entries(struct dentry *de)
{
struct list_head *node;
- spin_lock(&de->d_lock);
+ seq_spin_lock(&de->d_lock);
node = de->d_subdirs.next;
while (node != &de->d_subdirs) {
struct dentry *d = list_entry(node, struct dentry, d_u.d_child);
- spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
+ seq_spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
list_del_init(node);
if (d->d_inode) {
dget_dlock(d);
- spin_unlock(&de->d_lock);
- spin_unlock(&d->d_lock);
+ seq_spin_unlock(&de->d_lock);
+ seq_spin_unlock(&d->d_lock);
d_delete(d);
simple_unlink(de->d_inode, d);
dput(d);
- spin_lock(&de->d_lock);
+ seq_spin_lock(&de->d_lock);
} else
- spin_unlock(&d->d_lock);
+ seq_spin_unlock(&d->d_lock);
node = de->d_subdirs.next;
}
- spin_unlock(&de->d_lock);
+ seq_spin_unlock(&de->d_lock);
}
#define BOOL_DIR_NAME "booleans"
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