Kaixu Xia 38e331e321 locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count ... The __this_cpu*() accessors are (in general) IRQ-unsafe which, given that percpu-rwsem is a blocking primitive, should be just fine. However, file_end_write() is used from IRQ context and will cause load-store issues on architectures where the per-cpu accessors are not natively irq-safe. Fix it by using the IRQ-safe this_cpu_*() for operations on read_count. This will generate more expensive code on a number of platforms, which might cause a performance regression for some of the other percpu-rwsem users. If any such is reported, we can consider alternative solutions. Fixes: 70fe2f48152e ("aio: fix freeze protection of aio writes") Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Oleg Nesterov <oleg@redhat.com> Link: https://lkml.kernel.org/r/20200915140750.137881-1-houtao1@huawei.com		2021-07-15 15:53:01 +08:00
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Makefile	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
lock_events.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
lock_events.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
lock_events_list.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
lockdep.c	lockdep: Add a missing initialization hint to the "INFO: Trying to register non-static key" message	2021-05-20 16:07:08 +08:00
lockdep_internals.h	locking/lockdep: Decrement IRQ context counters when removing lock chain	2021-03-16 16:36:52 +08:00
lockdep_proc.c	locking/lockdep: Fix overflow in presentation of average lock-time	2021-03-16 16:34:51 +08:00
lockdep_states.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
locktorture.c	locktorture: Print ratio of acquisitions, not failures	2021-03-16 16:26:41 +08:00
mcs_spinlock.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
mutex-debug.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
mutex-debug.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
mutex.c	locking/ww_mutex: Simplify use_ww_ctx & ww_ctx handling	2021-05-20 16:06:47 +08:00
mutex.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
osq_lock.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
percpu-rwsem.c	locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count	2021-07-15 15:53:01 +08:00
qrwlock.c	locking/qrwlock: Fix ordering in queued_write_lock_slowpath()	2021-05-20 16:07:14 +08:00
qspinlock.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
qspinlock_paravirt.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
qspinlock_stat.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
rtmutex-debug.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
rtmutex-debug.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
rtmutex.c	rtmutex: Remove unused argument from rt_mutex_proxy_unlock()	2021-04-12 12:51:41 +08:00
rtmutex.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
rtmutex_common.h	rtmutex: Remove unused argument from rt_mutex_proxy_unlock()	2021-04-12 12:51:41 +08:00
rwsem.c	exec: Transform exec_update_mutex into a rw_semaphore	2021-04-12 12:51:05 +08:00
rwsem.h	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
semaphore.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
spinlock.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
spinlock_debug.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00
test-ww_mutex.c	Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces.	2021-03-16 11:01:34 +08:00