static void ipv4_link_failure(struct sk_buff *skb)
{
	struct rtable *rt;

	ipv4_send_dest_unreach(skb);

	rt = skb_rtable(skb);
	if (rt)
		dst_set_expires(&rt->dst, 0);
}
static void ipv4_link_failure(struct sk_buff *skb)
{
	struct rtable *rt;

	ipv4_send_dest_unreach(skb);

	rt = skb_rtable(skb);
	if (rt)
		dst_set_expires(&rt->dst, 0);
}