diff --git a/[refs] b/[refs]
index 69df20cb7dab..c80224edbfcd 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 21c4d5e07859a6fc0f62be37da15b161e142c8d1
+refs/heads/master: 2ce9047f5d8464039da8ff986e71be5546e229c0
diff --git a/trunk/drivers/net/e1000/e1000_main.c b/trunk/drivers/net/e1000/e1000_main.c
index 93b97c6b8a63..681b738c6dac 100644
--- a/trunk/drivers/net/e1000/e1000_main.c
+++ b/trunk/drivers/net/e1000/e1000_main.c
@@ -2867,6 +2867,9 @@ e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
 
 	tx_ring->next_to_use = i;
 	writel(i, adapter->hw.hw_addr + tx_ring->tdt);
+	/* we need this if more than one processor can write to our tail
+	 * at a time, it syncronizes IO on IA64/Altix systems */
+	mmiowb();
 }
 
 /**