diff mbox series

[barrier,cleanup,v1,6/7] io_uring: remove unnecessary barrier after incrementing dropped counter

Message ID 20190424215422.7404-6-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 
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>
---
 fs/io_uring.c | 2 --
 1 file changed, 2 deletions(-)
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Patch

diff --git a/fs/io_uring.c b/fs/io_uring.c
index f93a9fca8311..0287f6694e3b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1843,8 +1843,6 @@  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;
 }