Commit 82ab082c authored by Stefan Bühler's avatar Stefan Bühler Committed by Jens Axboe
Browse files

io_uring: remove unnecessary barrier before reading SQ tail 



There is no operation before to order with.

Signed-off-by: default avatarStefan Bühler <source@stbuehler.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 9e4c15a3

fs/io_uring.c

+0 −2
Original line number Diff line number Diff line
@@ -1831,8 +1831,6 @@ static bool io_get_sqring(struct io_ring_ctx *ctx, struct sqe_submit *s) 
	 *    though the application is the one updating it.

	 */

	head = ctx->cached_sq_head;

	/* See comment at the top of this file */

	smp_rmb();

	/* make sure SQ entry isn't read before tail */

	if (head == smp_load_acquire(&ring->r.tail))

		return false;

CRA Git | Maintained and supported by SUSTech CRA and CCSE