fib_trie.c.patch

--- ../linux-3.18.27/net/ipv4/fib_trie.c	2016-02-16 04:47:06.000000000 +0800
+++ ./fib_trie.c	2016-08-14 16:54:35.977174013 +0800
@@ -1327,6 +1327,7 @@
 err:
 	return err;
 }
+EXPORT_SYMBOL(fib_table_insert);
 
 /* should be called with rcu_read_lock */
 static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l,
@@ -1697,6 +1698,7 @@
 	alias_free_mem_rcu(fa);
 	return 0;
 }
+EXPORT_SYMBOL(fib_table_delete);
 
 static int trie_flush_list(struct list_head *head)
 {