linux-stable/fs/fscache
Hou Tao 3288666c72 fscache: Use clear_and_wake_up_bit() in fscache_create_volume_work()
fscache_create_volume_work() uses wake_up_bit() to wake up the processes
which are waiting for the completion of volume creation. According to
comments in wake_up_bit() and waitqueue_active(), an extra smp_mb() is
needed to guarantee the memory order between FSCACHE_VOLUME_CREATING
flag and waitqueue_active() before invoking wake_up_bit().

Fixing it by using clear_and_wake_up_bit() to add the missing memory
barrier.

Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20230113115211.2895845-3-houtao@huaweicloud.com/ # v3
2023-01-30 12:51:54 +00:00
..
cache.c fscache: Use wrapper fscache_set_cache_state() directly when relinquishing 2022-04-08 23:54:37 +01:00
cookie.c fscache: Fix oops due to race with cookie_lru and use_cookie 2022-12-07 11:49:18 -08:00
internal.h fscache: Move fscache_cookies_seq_ops specific code under CONFIG_PROC_FS 2022-04-08 23:54:37 +01:00
io.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
Kconfig fscache: remove FSCACHE_OLD_API Kconfig option 2022-04-08 23:54:37 +01:00
main.c fscache: Implement cookie-level access helpers 2022-01-07 09:22:19 +00:00
Makefile fscache: Provide a means to begin an operation 2022-01-07 09:22:19 +00:00
proc.c fscache: Implement cookie registration 2022-01-07 09:22:19 +00:00
stats.c fscache, cachefiles: Display stat of culling events 2022-01-07 13:43:18 +00:00
volume.c fscache: Use clear_and_wake_up_bit() in fscache_create_volume_work() 2023-01-30 12:51:54 +00:00