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| author | linke li <lilinke99@qq.com> | 2024-04-26 13:34:44 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-04-26 16:40:28 +0300 |
| commit | 6ad0d7e0f4b68f87a98ea2b239123b7d865df86b (patch) | |
| tree | d8ac274dd632519dc9f9694cd631024cfb3eeaa7 /drivers/md | |
| parent | 07d1b99825f40f9c0d93e6b99d79a08d0717bac1 (diff) | |
| download | linux-6ad0d7e0f4b68f87a98ea2b239123b7d865df86b.tar.xz | |
sbitmap: use READ_ONCE to access map->word
In __sbitmap_queue_get_batch(), map->word is read several times, and
update atomically using atomic_long_try_cmpxchg(). But the first two read
of map->word is not protected.
This patch moves the statement val = READ_ONCE(map->word) forward,
eliminating unprotected accesses to map->word within the function.
It is aimed at reducing the number of benign races reported by KCSAN in
order to focus future debugging effort on harmful races.
Signed-off-by: linke li <lilinke99@qq.com>
Link: https://lore.kernel.org/r/tencent_0B517C25E519D3D002194E8445E86C04AD0A@qq.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
0 files changed, 0 insertions, 0 deletions