ipv4: Cache routes in nexthop exception entries.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index e331746..926142e 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -55,6 +55,7 @@
 	u32				fnhe_pmtu;
 	__be32				fnhe_gw;
 	unsigned long			fnhe_expires;
+	struct rtable __rcu		*fnhe_rth;
 	unsigned long			fnhe_stamp;
 };