Peter Zijlstra 97bc540bfb locking/mutex: Fix HANDOFF condition ... [ Upstream commit 048661a1f9 ] Yanfei reported that setting HANDOFF should not depend on recomputing @first, only on @first state. Which would then give: if (ww_ctx || !first) first = __mutex_waiter_is_first(lock, &waiter); if (first) __mutex_set_flag(lock, MUTEX_FLAG_HANDOFF); But because 'ww_ctx || !first' is basically 'always' and the test for first is relatively cheap, omit that first branch entirely. Reported-by: Yanfei Xu <yanfei.xu@windriver.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Waiman Long <longman@redhat.com> Reviewed-by: Yanfei Xu <yanfei.xu@windriver.com> Link: https://lore.kernel.org/r/20210630154114.896786297@infradead.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-09-15 09:50:23 +02:00
..
lock_events_list.h
lock_events.c
lock_events.h
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c	lockdep: Fix wait-type for empty stack	2021-07-14 16:56:10 +02:00
locktorture.c
Makefile
mcs_spinlock.h
mutex-debug.c	locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal	2021-05-26 12:06:50 +02:00
mutex-debug.h	locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal	2021-05-26 12:06:50 +02:00
mutex.c	locking/mutex: Fix HANDOFF condition	2021-09-15 09:50:23 +02:00
mutex.h	locking/mutex: clear MUTEX_FLAGS if wait_list is empty due to signal	2021-05-26 12:06:50 +02:00
osq_lock.c
percpu-rwsem.c
qrwlock.c	locking/qrwlock: Fix ordering in queued_write_lock_slowpath()	2021-04-28 13:40:00 +02:00
qspinlock_paravirt.h
qspinlock_stat.h
qspinlock.c
rtmutex_common.h	rtmutex: Remove unused argument from rt_mutex_proxy_unlock()	2021-01-30 13:55:17 +01:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex.c	rtmutex: Remove unused argument from rt_mutex_proxy_unlock()	2021-01-30 13:55:17 +01:00
rtmutex.h
rwsem.c	rwsem: Implement down_read_interruptible	2021-01-09 13:46:24 +01:00
rwsem.h
semaphore.c
spinlock_debug.c
spinlock.c
test-ww_mutex.c