io_uring: remove extra check in __io_commit_cqring (07910158) · Commits · 戴 / test

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

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)