ROOM_NORMAL
return ROOM_NORMAL;
ret = ROOM_NORMAL;
ret = ROOM_NORMAL;
pressure = ret != ROOM_NORMAL;
__packet_rcv_has_room(po, NULL) == ROOM_NORMAL)
if (room == ROOM_NORMAL ||
packet_rcv_has_room(po_next, skb) == ROOM_NORMAL) {