pfifo_head_drop_qdisc_ops 90 include/net/pkt_sched.h extern struct Qdisc_ops pfifo_head_drop_qdisc_ops; pfifo_head_drop_qdisc_ops 2277 net/sched/sch_api.c register_qdisc(&pfifo_head_drop_qdisc_ops); pfifo_head_drop_qdisc_ops 128 net/sched/sch_fifo.c struct Qdisc_ops pfifo_head_drop_qdisc_ops __read_mostly = {