static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
{
	u32 res;

	res = filter_rcv(sk, buf);
	if (res)
		tipc_reject_msg(buf, res);
	return 0;
}
static int backlog_rcv(struct sock *sk, struct sk_buff *buf)
{
	u32 res;

	res = filter_rcv(sk, buf);
	if (res)
		tipc_reject_msg(buf, res);
	return 0;
}