From f89e49e79f839dbe79364ec6cd7e2274ad11b120 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Mon, 6 Sep 2010 18:21:41 -0700
Subject: [PATCH] ibmveth: Use lighter weight read memory barrier in
ibmveth_poll
We want to order the read in ibmveth_rxq_pending_buffer and the read of
ibmveth_rxq_buffer_valid which are both cacheable memory. smp_rmb() is good
enough for this.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Santiago Leon <santil@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ibmveth.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index c236c8af3367..aedcb1802182 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -1010,7 +1010,7 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
if (!ibmveth_rxq_pending_buffer(adapter))
break;
- rmb();
+ smp_rmb();
if (!ibmveth_rxq_buffer_valid(adapter)) {
wmb(); /* suggested by larson1 */
adapter->rx_invalid_buffer++;
--
GitLab