Qian Cai 33190b675c locking/osq_lock: Annotate a data race in osq_lock ... The prev->next pointer can be accessed concurrently as noticed by KCSAN: write (marked) to 0xffff9d3370dbbe40 of 8 bytes by task 3294 on cpu 107: osq_lock+0x25f/0x350 osq_wait_next at kernel/locking/osq_lock.c:79 (inlined by) osq_lock at kernel/locking/osq_lock.c:185 rwsem_optimistic_spin <snip> read to 0xffff9d3370dbbe40 of 8 bytes by task 3398 on cpu 100: osq_lock+0x196/0x350 osq_lock at kernel/locking/osq_lock.c:157 rwsem_optimistic_spin <snip> Since the write only stores NULL to prev->next and the read tests if prev->next equals to this_cpu_ptr(&osq_node). Even if the value is shattered, the code is still working correctly. Thus, mark it as an intentional data race using the data_race() macro. Signed-off-by: Qian Cai <cai@lca.pw> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>		2020-06-29 12:04:48 -07:00
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lock_events_list.h	locking/rwsem: Adaptive disabling of reader optimistic spinning	2019-06-17 12:28:09 +02:00
lock_events.c
lock_events.h	locking/lock_events: Use raw_cpu_{add,inc}() for stats	2019-06-03 12:32:56 +02:00
lockdep_internals.h	locking/lockdep: Reuse freed chain_hlocks entries	2020-02-11 13:10:52 +01:00
lockdep_proc.c	locking/lockdep: Reuse freed chain_hlocks entries	2020-02-11 13:10:52 +01:00
lockdep_states.h
lockdep.c	lockdep: __always_inline more for noinstr	2020-06-11 15:15:28 +02:00
locktorture.c	locktorture: Forgive apparent unfairness if CPU hotplug	2020-02-20 15:59:59 -08:00
Makefile	kcsan: Make KCSAN compatible with lockdep	2020-03-21 09:41:16 +01:00
mcs_spinlock.h
mutex-debug.c	lockdep: Introduce wait-type checks	2020-03-21 16:00:24 +01:00
mutex-debug.h
mutex.c	Revert "locking/mutex: Complain upon mutex API misuse in IRQ contexts"	2019-12-11 00:27:43 +01:00
mutex.h	mutex: Fix up mutex_waiter usage	2019-08-08 09:09:25 +02:00
osq_lock.c	locking/osq_lock: Annotate a data race in osq_lock	2020-06-29 12:04:48 -07:00
percpu-rwsem.c	locking/percpu-rwsem: Fix a task_struct refcount	2020-04-08 12:05:06 +02:00
qrwlock.c
qspinlock_paravirt.h	Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"	2019-09-25 10:22:37 +02:00
qspinlock_stat.h
qspinlock.c	locking/qspinlock: Fix inaccessible URL of MCS lock paper	2020-01-17 10:19:30 +01:00
rtmutex_common.h
rtmutex-debug.c	kernel: rename show_stack_loglvl() => show_stack()	2020-06-09 09:39:13 -07:00
rtmutex-debug.h
rtmutex.c	locking/rtmutex: Remove unused rt_mutex_cmpxchg_relaxed()	2020-04-27 12:26:40 +02:00
rtmutex.h
rwsem.c	lockdep: Introduce wait-type checks	2020-03-21 16:00:24 +01:00
rwsem.h	locking/percpu-rwsem: Remove the embedded rwsem	2020-02-11 13:10:56 +01:00
semaphore.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 436	2019-06-05 17:37:17 +02:00
spinlock_debug.c	lockdep: Introduce wait-type checks	2020-03-21 16:00:24 +01:00
spinlock.c
test-ww_mutex.c