[Xen-devel] [PATCH] xen/netfront: remove unnecessary wmb

[Jacob Wen <jian.w.wen@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 drivers/net/xen-netfront.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index f17f602e6171..a8303afa15f1 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -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);
-- 
2.17.1


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