diff --git a/[refs] b/[refs]
index 0d621db9d86b..2ffc3cd0c0e0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: df2a4a711478f5fc28b3ac85f07e191591e31eb0
+refs/heads/master: e690b5a9be26965543b7252492ed22052af960b6
diff --git a/trunk/drivers/staging/hv/ring_buffer.c b/trunk/drivers/staging/hv/ring_buffer.c
index 8b625533fe43..42f76728429a 100644
--- a/trunk/drivers/staging/hv/ring_buffer.c
+++ b/trunk/drivers/staging/hv/ring_buffer.c
@@ -413,7 +413,7 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info,
 					     sizeof(u64));
 
 	/* Make sure we flush all writes before updating the writeIndex */
-	mb();
+	smp_wmb();
 
 	/* Now, update the write location */
 	hv_set_next_write_location(outring_info, next_write_location);