xenbus: add two more mb()s

Signed-off-by: Wei Liu <liuw@liuw.name>

diff --git a/platform/xen/xen/xenbus/xenbus.c b/platform/xen/xen/xenbus/xenbus.c
index e2192fec62adc79c2fd0964352af594c36cfd948..86d61a068c8b57c847cce6c89aaac24f619e508f 100644 (file)
--- a/platform/xen/xen/xenbus/xenbus.c
+++ b/platform/xen/xen/xenbus/xenbus.c
@@ -294,6 +294,7 @@ static void xenbus_thread_func(void *ign)
                event->path = data;
                event->token = event->path + bmk_strlen(event->path) + 1;
 
+                mb();
                 xenstore_buf->rsp_cons += msg.len + sizeof(msg);
 
                 spin_lock(&xenbus_req_lock);
@@ -323,6 +324,7 @@ static void xenbus_thread_func(void *ign)
                     req_info[msg.req_id].for_queue->reply,
                     MASK_XENSTORE_IDX(xenstore_buf->rsp_cons),
                     msg.len + sizeof(msg));
+                mb();
                 xenstore_buf->rsp_cons += msg.len + sizeof(msg);
                 spin_lock(&xenbus_req_lock);
                 queue_event(req_info[msg.req_id].reply_queue,