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| author | Kornilios Kourtis <kkourt@kkourt.io> | 2019-10-30 16:07:53 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-10-30 09:09:57 -0600 |
| commit | 4fcf0777c4c334d0b785baed0ec72411905001e9 (patch) | |
| tree | c8d8a6361dc6b1e735b3223dffb32c2a17f7fb18 | |
| parent | a8b3b787a235e9f37efb75528ee1aede6c5ed948 (diff) | |
| download | liburing-4fcf0777c4c334d0b785baed0ec72411905001e9.tar.gz liburing-4fcf0777c4c334d0b785baed0ec72411905001e9.tar.bz2 | |
sq_ring_needs_enter(): force loading of kflags
ring->sq.kflags is set by the kernel. Ensure the compiler always loads
the value from memory when doing the check.
Signed-off-by: Kornilios Kourtis <kornilios@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | src/queue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/queue.c b/src/queue.c index 1c8896e..758fce8 100644 --- a/src/queue.c +++ b/src/queue.c @@ -152,7 +152,7 @@ static inline bool sq_ring_needs_enter(struct io_uring *ring, unsigned *flags) { if (!(ring->flags & IORING_SETUP_SQPOLL)) return true; - if ((*ring->sq.kflags & IORING_SQ_NEED_WAKEUP)) { + if (IO_URING_READ_ONCE(*ring->sq.kflags) & IORING_SQ_NEED_WAKEUP) { *flags |= IORING_ENTER_SQ_WAKEUP; return true; } |