Commit 307f39b0 authored Nov 09, 2018 by Jacob Wen Committed by David S. Miller Nov 09, 2018

xen/netfront: remove unnecessary wmb



RING_PUSH_REQUESTS_AND_CHECK_NOTIFY is already able to make sure backend sees
requests before req_prod is updated.

Signed-off-by: Jacob Wen <jian.w.wen@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent db8ba1e8

drivers/net/xen-netfront.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -337,8 +337,6 @@ static void xennet_alloc_rx_buffers(struct netfront_queue *queue)
		return;
		}

		wmb(); /* barrier so backend seens requests */

		RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&queue->rx, notify);
		if (notify)
		notify_remote_via_irq(queue->rx_irq);