--- zzzz-none-000/linux-4.4.60/include/net/ip6_route.h	2017-04-08 07:53:53.000000000 +0000
+++ maple-7510-730/linux-4.4.60/include/net/ip6_route.h	2021-03-17 14:36:41.000000000 +0000
@@ -137,6 +137,8 @@
 void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
 void rt6_clean_tohost(struct net *net, struct in6_addr *gateway);
 
+int rt6_register_notifier(struct notifier_block *nb);
+int rt6_unregister_notifier(struct notifier_block *nb);
 
 /*
  *	Store a destination cache entry in a socket