diff options
| author | Ming Lei <ming.lei@redhat.com> | 2024-09-19 05:17:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-04 17:29:38 +0300 |
| commit | 54fd87259c8520187e3b9b3d1f18bf6a91c0a993 (patch) | |
| tree | 3f74a3734fd297582be024d8357de1c54188ba07 /include | |
| parent | 93773e4461978d30b8b90e4390e0fee2f397160b (diff) | |
| download | linux-54fd87259c8520187e3b9b3d1f18bf6a91c0a993.tar.xz | |
lib/sbitmap: define swap_lock as raw_spinlock_t
[ Upstream commit 65f666c6203600053478ce8e34a1db269a8701c9 ]
When called from sbitmap_queue_get(), sbitmap_deferred_clear() may be run
with preempt disabled. In RT kernel, spin_lock() can sleep, then warning
of "BUG: sleeping function called from invalid context" can be triggered.
Fix it by replacing it with raw_spin_lock.
Cc: Yang Yang <yang.yang@vivo.com>
Fixes: 72d04bdcf3f7 ("sbitmap: fix io hung due to race on sbitmap_word::cleared")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Yang Yang <yang.yang@vivo.com>
Link: https://lore.kernel.org/r/20240919021709.511329-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sbitmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/sbitmap.h b/include/linux/sbitmap.h index c09cdcc99471..189140bf11fc 100644 --- a/include/linux/sbitmap.h +++ b/include/linux/sbitmap.h @@ -40,7 +40,7 @@ struct sbitmap_word { /** * @swap_lock: serializes simultaneous updates of ->word and ->cleared */ - spinlock_t swap_lock; + raw_spinlock_t swap_lock; } ____cacheline_aligned_in_smp; /** |