+ unsigned long last_rx; /* Time of last Rx
+ * This should not be set in
+ * drivers, unless really needed,
+ * because network stack (bonding)
+ * use it if/when necessary, to
+ * avoid dirtying this cache line.
+ */
+
+ struct net_device *master; /* Pointer to master device of a group,
+ * which this device is member of.
+ */
+