void tcp_clear_retrans(struct tcp_sock *tp)
{
	tp->retrans_out = 0;
	tp->lost_out = 0;
	tp->undo_marker = 0;
	tp->undo_retrans = -1;
	tp->fackets_out = 0;
	tp->sacked_out = 0;
}
void tcp_clear_retrans(struct tcp_sock *tp)
{
	tp->retrans_out = 0;
	tp->lost_out = 0;
	tp->undo_marker = 0;
	tp->undo_retrans = -1;
	tp->fackets_out = 0;
	tp->sacked_out = 0;
}