TUN_ASYNC         273 net/if_tun.c   	open = tp->tun_flags & (TUN_OPEN|TUN_NBIO|TUN_ASYNC);
TUN_ASYNC         350 net/if_tun.c   	tp->tun_flags &= ~(TUN_OPEN|TUN_NBIO|TUN_ASYNC);
TUN_ASYNC         586 net/if_tun.c   	if (tp->tun_flags & TUN_ASYNC && tp->tun_pgid)
TUN_ASYNC         658 net/if_tun.c   			tp->tun_flags |= TUN_ASYNC;
TUN_ASYNC         660 net/if_tun.c   			tp->tun_flags &= ~TUN_ASYNC;