mazhenhua 7a7b5f89d9 ANDROID: locking/rwsem: only clean RWSEM_FLAG_HANDOFF when already set ... sem->count will be negative after writer is killed if flag RWSEM_FLAG_HANDOFF is not set, we shouldn't clean again CPU2 CPU4 task A[reader] task B[writer] down_read_killable[locked] sem->count=0x100 down_write_killable sem->count=0x102[wlist not empty] up_read count=0x2 sig kill received down_read_killable sem->count=0x102[wlist not empty] goto branch out_nolock: list_del(&waiter.list); wait list is empty sem->count-RWSEM_FLAG_HANDOFF sem->count=0xFE list_empty(&sem->wait_list) is TRUE sem->count andnot RWSEM_FLAG_WAITERS sem->count=0xFC up_read sem->count-=0x100 sem->count=0xFFFFFFFFFFFFFFFC DEBUG_RWSEMS_WARN_ON(tmp < 0, sem); Bug: 204595609 Link: https://lore.kernel.org/all/a630a9aa-8c66-31c9-21a0-3d30bde2c9df@redhat.com/T/ Signed-off-by: mazhenhua <mazhenhua@xiaomi.com> Change-Id: Ife64c179335d74768a3d68e402c72d10148f3e7e		2021-11-16 18:07:21 +00:00
..
lock_events_list.h
lock_events.c
lock_events.h
lockdep_internals.h	lockdep: Fix usage_traceoverflow	2020-10-09 08:53:08 +02:00
lockdep_proc.c
lockdep_states.h
lockdep.c	locking/lockdep: Mark local_lock_t	2021-09-15 09:50:41 +02:00
locktorture.c	locktorture: Make function torture_percpu_rwsem_init() static	2020-08-24 18:45:32 -07:00
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	This is the 5.10.65 stable release	2021-09-15 14:16:47 +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	locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count	2020-09-16 16:26:56 +02:00
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	ANDROID: vendor_hooks: set debugging data when rt_mutex is working	2021-05-07 00:12:54 +00:00
rtmutex.h
rwsem.c	ANDROID: locking/rwsem: only clean RWSEM_FLAG_HANDOFF when already set	2021-11-16 18:07:21 +00:00
rwsem.h
semaphore.c
spinlock_debug.c
spinlock.c
test-ww_mutex.c