diff -drupN a/include/net/addrconf.h b/include/net/addrconf.h
--- a/include/net/addrconf.h	2018-08-06 17:23:04.000000000 +0300
+++ b/include/net/addrconf.h	2022-06-12 05:28:14.000000000 +0300
@@ -244,6 +244,8 @@ static inline bool ipv6_is_mld(struct sk
 void addrconf_prefix_rcv(struct net_device *dev,
 			 u8 *opt, int len, bool sllao);
 
+u32 addrconf_rt_table(const struct net_device *dev, u32 default_table);
+
 /*
  *	anycast prototypes (anycast.c)
  */