extern void br_config_bpdu_generation(struct net_bridge *);
extern void br_configuration_update(struct net_bridge *);
extern void br_port_state_selection(struct net_bridge *);
-extern void br_received_config_bpdu(struct net_bridge_port *p, struct br_config_bpdu *bpdu);
+extern void br_received_config_bpdu(struct net_bridge_port *p,
+ const struct br_config_bpdu *bpdu);
extern void br_received_tcn_bpdu(struct net_bridge_port *p);
extern void br_transmit_config(struct net_bridge_port *p);
extern void br_transmit_tcn(struct net_bridge *br);