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io_uring: remove unnecessary barrier after incrementing dropped counter 

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>
This commit is contained in:
Stefan Bühler 2019-04-24 23:54:21 +02:00 committed by Jens Axboe
parent 82ab082c0e
commit b841f19524
1 changed files with 0 additions and 2 deletions
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2
fs/io_uring.c
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@ -1846,8 +1846,6 @@ static bool io_get_sqring(struct io_ring_ctx *ctx, struct sqe_submit *s)
/* drop invalid entries */ /* drop invalid entries */
ctx->cached_sq_head++; ctx->cached_sq_head++;
ring->dropped++; ring->dropped++;
/* See comment at the top of this file */
smp_wmb();
return false; return false;
} }