ipv6: use standard lists for FIB walks

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 8f279dd..86f46c4 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -124,7 +124,7 @@
 }
 
 struct fib6_walker_t {
-	struct fib6_walker_t *prev, *next;
+	struct list_head lh;
 	struct fib6_node *root, *node;
 	struct rt6_info *leaf;
 	unsigned char state;