diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 278312c..2ab9268 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -164,5 +164,15 @@
 	return rt->rt6i_flags & RTF_LOCAL;
 }
 
+int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
+
+static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
+{
+	struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
+
+	return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
+	       skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
+}
+
 #endif
 #endif