Commit 07910158 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring: remove extra check in __io_commit_cqring 



__io_commit_cqring() is almost always called when there is a change in
the rings, so the check is rather pessimising.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 711be031

fs/io_uring.c

+5 −7
Original line number Diff line number Diff line
@@ -860,7 +860,6 @@ static void __io_commit_cqring(struct io_ring_ctx *ctx) 
{

	struct io_rings *rings = ctx->rings;



	if (ctx->cached_cq_tail != READ_ONCE(rings->cq.tail)) {

	/* order cqe stores with ring update */

	smp_store_release(&rings->cq.tail, ctx->cached_cq_tail);
@@ -869,7 +868,6 @@ static void __io_commit_cqring(struct io_ring_ctx *ctx) 
		kill_fasync(&ctx->cq_fasync, SIGIO, POLL_IN);

	}

}

}



static inline bool io_prep_async_work(struct io_kiocb *req,

				      struct io_kiocb **link)