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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-09-08 20:49:17 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-09-08 13:57:56 -0600 |
| commit | c57a91fb1ccfa203ba3e31e5a389cb04de5b0561 (patch) | |
| tree | d03ab06beb7d97625301c48c80df6b3d9fef5489 /lib/error-inject.c | |
| parent | 713b9825a4c47897f66ad69409581e7734a8728e (diff) | |
io_uring: fix missing mb() before waitqueue_active
In case of !SQPOLL, io_cqring_ev_posted_iopoll() doesn't provide a
memory barrier required by waitqueue_active(&ctx->poll_wait). There is
a wq_has_sleeper(), which does smb_mb() inside, but it's called only for
SQPOLL.
Fixes: 5fd4617840596 ("io_uring: be smarter about waking multiple CQ ring waiters")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2982e53bcea2274006ed435ee2a77197107d8a29.1631130542.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'lib/error-inject.c')
0 files changed, 0 insertions, 0 deletions