Commit b841f195 authored Apr 24, 2019 by Stefan Bühler Committed by Jens Axboe Apr 30, 2019

io_uring: remove unnecessary barrier after incrementing dropped counter



smp_store_release in io_commit_sqring already orders the store to
dropped before the update to SQ head.

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 82ab082c

fs/io_uring.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -1846,8 +1846,6 @@ static bool io_get_sqring(struct io_ring_ctx ctx, struct sqe_submit s)
		/* drop invalid entries */
		ctx->cached_sq_head++;
		ring->dropped++;
		/* See comment at the top of this file */
		smp_wmb();
		return false;
		}