extern struct notifier_block ovs_dp_device_notifier;
extern struct genl_family dp_vport_genl_family;
-extern const struct genl_multicast_group ovs_dp_vport_multicast_group;
+extern struct genl_multicast_group ovs_dp_vport_multicast_group;
void ovs_dp_process_packet(struct sk_buff *skb, struct sw_flow_key *key);
void ovs_dp_detach_port(struct vport *);