ip_route_output_key_hash_rcu
struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *flp,
rth = ip_route_output_key_hash_rcu(net, fl4, &res, skb);
rt = ip_route_output_key_hash_rcu(net, &fl4, &res, skb);