static int unix_dgram_peer_wake_me(struct sock *sk, struct sock *other)
{
	int connected;

	connected = unix_dgram_peer_wake_connect(sk, other);

	/* If other is SOCK_DEAD, we want to make sure we signal
	 * POLLOUT, such that a subsequent write() can get a
	 * -ECONNREFUSED. Otherwise, if we haven't queued any skbs
	 * to other and its full, we will hang waiting for POLLOUT.
	 */
	if (unix_recvq_full(other) && !sock_flag(other, SOCK_DEAD))
		return 1;

	if (connected)
		unix_dgram_peer_wake_disconnect(sk, other);

	return 0;
}
static int unix_dgram_peer_wake_me(struct sock *sk, struct sock *other)
{
	int connected;

	connected = unix_dgram_peer_wake_connect(sk, other);

	 
	if (unix_recvq_full(other) && !sock_flag(other, SOCK_DEAD))
		return 1;

	if (connected)
		unix_dgram_peer_wake_disconnect(sk, other);

	return 0;
}