]> git.ipfire.org Git - thirdparty/kernel/stable.git/commit
lib/sbitmap: define swap_lock as raw_spinlock_t
authorMing Lei <ming.lei@redhat.com>
Thu, 19 Sep 2024 02:17:09 +0000 (10:17 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 4 Oct 2024 14:29:38 +0000 (16:29 +0200)
commit54fd87259c8520187e3b9b3d1f18bf6a91c0a993
tree3f74a3734fd297582be024d8357de1c54188ba07
parent93773e4461978d30b8b90e4390e0fee2f397160b
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>
include/linux/sbitmap.h
lib/sbitmap.c