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android_kernel_sony_sdm845/kernel/locking
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Xie Yongji b4df458223 locking/rwsem: Fix (possible) missed wakeup 
[ Upstream commit e158488be27b157802753a59b336142dc0eb0380 ]

Because wake_q_add() can imply an immediate wakeup (cmpxchg failure
case), we must not rely on the wakeup being delayed. However, commit:

  e38513905e ("locking/rwsem: Rework zeroing reader waiter->task")

relies on exactly that behaviour in that the wakeup must not happen
until after we clear waiter->task.

[ peterz: Added changelog. ]

Signed-off-by: Xie Yongji <xieyongji@baidu.com>
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: e38513905e ("locking/rwsem: Rework zeroing reader waiter->task")
Link: https://lkml.kernel.org/r/1543495830-2644-1-git-send-email-xieyongji@baidu.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-03-05 17:57:05 +01:00
..
lockdep.c locking/lockdep: Fix debug_locks off performance problem 2018-11-13 11:16:48 -08:00
lockdep_internals.h lockdep: Limit static allocations if PROVE_LOCKING_SMALL is defined 2016-11-18 11:33:19 -08:00
lockdep_proc.c lockdep: Fix lock_chain::base size 2016-04-23 13:53:03 +02:00
lockdep_states.h
locktorture.c locking/locktorture: Fix num reader/writer corner cases 2018-03-22 09:17:58 +01:00
Makefile locking/lglock: Remove lglock implementation 2016-09-22 15:25:56 +02:00
mcs_spinlock.h locking/mcs: Fix mcs_spin_lock() ordering 2016-02-29 10:02:41 +01:00
mutex-debug.c locking: avoid passing around 'thread_info' in mutex debugging code 2016-06-23 12:11:17 -07:00
mutex-debug.h Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-25 12:41:29 -07:00
mutex.c locking: avoid passing around 'thread_info' in mutex debugging code 2016-06-23 12:11:17 -07:00
mutex.h Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-07-25 12:41:29 -07:00
osq_lock.c locking/osq_lock: Fix osq_lock queue corruption 2018-09-19 22:47:11 +02:00
percpu-rwsem.c locking/percpu-rwsem: Optimize readers and reduce global impact 2016-08-10 14:34:01 +02:00
qrwlock.c locking/atomic, arch/qrwlock: Employ atomic_fetch_add_acquire() 2016-06-16 10:48:34 +02:00
qspinlock.c locking/qspinlock, x86: Provide liveness guarantee 2018-12-21 14:11:34 +01:00
qspinlock_paravirt.h locking/qspinlock: Remove duplicate clear_pending() function from PV code 2018-12-21 14:11:34 +01:00
qspinlock_stat.h locking/pvstat: Separate wait_again and spurious wakeup stats 2016-08-10 14:16:02 +02:00
rtmutex-debug.c rtmutex: Cleanup deadlock detector debug logic 2014-06-21 22:05:30 +02:00
rtmutex-debug.h rtmutex: Cleanup deadlock detector debug logic 2014-06-21 22:05:30 +02:00
rtmutex.c rtmutex: Fix PI chain order integrity 2018-03-22 09:17:47 +01:00
rtmutex.h rtmutex: Cleanup deadlock detector debug logic 2014-06-21 22:05:30 +02:00
rtmutex_common.h rtmutex: Fix PI chain order integrity 2018-03-22 09:17:47 +01:00
rwsem-spinlock.c locking/rwsem-spinlock: Fix EINTR branch in __down_write_common() 2017-07-15 12:16:15 +02:00
rwsem-xadd.c locking/rwsem: Fix (possible) missed wakeup 2019-03-05 17:57:05 +01:00
rwsem.c locking/rwsem: Add reader-owned state to the owner field 2016-06-08 15:16:59 +02:00
rwsem.h locking/rwsem: Protect all writes to owner by WRITE_ONCE() 2016-06-08 15:16:59 +02:00
semaphore.c locking/semaphore: Resolve some shadow warnings 2014-09-04 07:17:24 +02:00
spinlock.c spinlock: Add spin_lock_bh_nested() 2015-01-03 14:32:57 -05:00
spinlock_debug.c locking/spinlock/debug: Remove spinlock lockup detection code 2017-09-02 07:07:54 +02:00