diff mbox series

[barrier,cleanup,v1,5/7] io_uring: remove unnecessary barrier before reading SQ tail

Message ID 20190424215422.7404-5-source@stbuehler.de (mailing list archive)
State Accepted, archived
Headers show
Series [barrier,cleanup,v1,1/7] io_uring: fix notes on barriers | expand

Commit Message

Stefan Bühler April 24, 2019, 9:54 p.m. UTC 
There is no operation before to order with.

Signed-off-by: Stefan Bühler <source@stbuehler.de>
---
 fs/io_uring.c | 2 --
 1 file changed, 2 deletions(-)
diff mbox series

Patch

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 31357cc0e8e6..f93a9fca8311 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1828,8 +1828,6 @@  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;