Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Waiman Long fb6a44f33b locking/rwsem: Protect all writes to owner by WRITE_ONCE() ... Without using WRITE_ONCE(), the compiler can potentially break a write into multiple smaller ones (store tearing). So a read from the same data by another task concurrently may return a partial result. This can result in a kernel crash if the data is a memory address that is being dereferenced. This patch changes all write to rwsem->owner to use WRITE_ONCE() to make sure that store tearing will not happen. READ_ONCE() may not be needed for rwsem->owner as long as the value is only used for comparison and not dereferencing. Signed-off-by: Waiman Long <Waiman.Long@hpe.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Douglas Hatch <doug.hatch@hpe.com> Cc: Jason Low <jason.low2@hp.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Hurley <peter@hurleysoftware.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hpe.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1463534783-38814-3-git-send-email-Waiman.Long@hpe.com Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-06-08 15:16:59 +02:00
..
lglock.c
lockdep.c	locking/lockdep: Use __jhash_mix() for iterate_chain_key()	2016-06-08 14:22:00 +02:00
lockdep_internals.h
lockdep_proc.c	lockdep: Fix lock_chain::base size	2016-04-23 13:53:03 +02:00
lockdep_states.h
locktorture.c	lcoking/locktorture: Simplify the torture_runnable computation	2016-04-28 10:57:51 +02:00
Makefile	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
mcs_spinlock.h
mutex-debug.c
mutex-debug.h	locking/mutex: Set and clear owner using WRITE_ONCE()	2016-06-03 12:06:10 +02:00
mutex.c	locking/ww_mutex: Report recursive ww_mutex locking early	2016-06-03 08:37:26 +02:00
mutex.h	locking/mutex: Set and clear owner using WRITE_ONCE()	2016-06-03 12:06:10 +02:00
osq_lock.c
percpu-rwsem.c	ext4: fix races between changing inode journal mode and ext4_writepages	2016-04-25 23:22:35 -04:00
qrwlock.c
qspinlock.c	locking/qspinlock: Add comments	2016-06-08 14:44:01 +02:00
qspinlock_paravirt.h
qspinlock_stat.h	locking/pvqspinlock: Robustify init_qspinlock_stat()	2016-05-05 09:58:51 +02:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex.c	locking/rtmutex: Only warn once on a trylock from bad context	2016-06-08 14:22:00 +02:00
rtmutex.h
rtmutex_common.h
rwsem-spinlock.c	locking/rwsem: Introduce basis for down_write_killable()	2016-04-13 10:42:20 +02:00
rwsem-xadd.c	locking/rwsem: Add reader-owned state to the owner field	2016-06-08 15:16:59 +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
spinlock.c
spinlock_debug.c