io_uring: remove unnecessary barrier after updating SQ head
There is no operation afterwards to order with.
Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3671a65..d3c57ee 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();
}
}
