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1be5d4fa0a
linux/kernel/locking
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Thomas Gleixner 1be5d4fa0a locking/rtmutex: Use READ_ONCE() in rt_mutex_owner() 
While debugging the rtmutex unlock vs. dequeue race Will suggested to use
READ_ONCE() in rt_mutex_owner() as it might race against the
cmpxchg_release() in unlock_rt_mutex_safe().

Will: "It's a minor thing which will most likely not matter in practice"

Careful search did not unearth an actual problem in todays code, but it's
better to be safe than surprised.

Suggested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20161130210030.431379999@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-12-02 11:13:26 +01:00
..
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
lockdep.c locking/lockdep: Use __jhash_mix() for iterate_chain_key() 2016-06-08 14:22:00 +02:00
locktorture.c lcoking/locktorture: Simplify the torture_runnable computation 2016-04-28 10:57:51 +02:00
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: Fix ordering of node initialisation in osq_lock 2015-12-17 11:40:29 -08:00
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_paravirt.h locking/pv-qspinlock: Use cmpxchg_release() in __pv_queued_spin_unlock() 2016-09-22 15:25:51 +02:00
qspinlock_stat.h locking/pvstat: Separate wait_again and spurious wakeup stats 2016-08-10 14:16:02 +02:00
qspinlock.c locking/qspinlock: Use __this_cpu_dec() instead of full-blown this_cpu_dec() 2016-06-27 11:37:41 +02:00
rtmutex_common.h locking/rtmutex: Use READ_ONCE() in rt_mutex_owner() 2016-12-02 11:13:26 +01:00
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 locking/rtmutex: Prevent dequeue vs. unlock race 2016-12-02 11:13:26 +01:00
rtmutex.h rtmutex: Cleanup deadlock detector debug logic 2014-06-21 22:05:30 +02:00
rwsem-spinlock.c locking/rwsem: Introduce basis for down_write_killable() 2016-04-13 10:42:20 +02:00
rwsem-xadd.c locking/rwsem: Scan the wait_list for readers only once 2016-08-18 15:37:11 +02:00
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_debug.c locking: Move the spinlock code to kernel/locking/ 2013-11-06 07:55:21 +01:00
spinlock.c spinlock: Add spin_lock_bh_nested() 2015-01-03 14:32:57 -05:00