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io_uring: remove unnecessary barrier after incrementing dropped counter
author
Stefan Bühler
<source@stbuehler.de>
Wed, 24 Apr 2019 21:54:21 +0000
(23:54 +0200)
committer
Jens Axboe
<axboe@kernel.dk>
Tue, 30 Apr 2019 15:40:02 +0000
(09:40 -0600)
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>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/io_uring.c
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diff --git
a/fs/io_uring.c
b/fs/io_uring.c
index 662f1c070c8cc1d5693c028ebe6816c72d4bdd4d..2ebc33cc907bfdd34d522f08ab95d49aa451c41b 100644
(file)
--- a/
fs/io_uring.c
+++ b/
fs/io_uring.c
@@
-1846,8
+1846,6
@@
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;
}