TCQ_F_DEQUEUE_DROPS
DEBUG_NET_WARN_ON_ONCE(!(q->flags & TCQ_F_DEQUEUE_DROPS));
if (qdisc->flags & TCQ_F_DEQUEUE_DROPS) {
sch->flags |= TCQ_F_DEQUEUE_DROPS;
sch->flags |= TCQ_F_DEQUEUE_DROPS;
sch->flags |= TCQ_F_DEQUEUE_DROPS;