This caused a problem on builds under 2.6.26 (and possibly other versions).
/*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
* Distributed under the terms of the GNU GPL version 2.
*
* Significant portions of this file may be copied from parts of the Linux
#include <linux/types.h>
#include <linux/rcupdate.h>
#include <linux/gfp.h>
+#include <linux/time.h>
#include "openvswitch/datapath-protocol.h"
#include "table.h"