From 9e4c15a3939448d2ea9b9bf59561183bbe3fdc49 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Stefan=20B=C3=BChler?= Date: Wed, 24 Apr 2019 23:54:19 +0200 Subject: [PATCH] io_uring: remove unnecessary barrier after updating SQ head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There is no operation afterwards to order with. Signed-off-by: Stefan Bühler Signed-off-by: Jens Axboe --- fs/io_uring.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 3671a654a146..d3c57ee233fe 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -1798,12 +1798,6 @@ static void io_commit_sqring(struct io_ring_ctx *ctx) * write new data to them. */ smp_store_release(&ring->r.head, ctx->cached_sq_head); - - /* - * write side barrier of head update, app has read side. See - * comment at the top of this file - */ - smp_wmb(); } } -- GitLab