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net_sched: introduce qdisc_replace() helper

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Remove nearly duplicated code and prepare for the following patch.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong
2016-02-25 14:55:00 -08:00
committed by David S. Miller
parent f12d33f4d8
commit 86a7996cc8
13 changed files with 29 additions and 78 deletions
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10
net/sched/sch_netem.c
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@@ -1037,15 +1037,7 @@ static int netem_graft(struct Qdisc *sch, unsigned long arg, struct Qdisc *new,
{
struct netem_sched_data *q = qdisc_priv(sch);
sch_tree_lock(sch);
*old = q->qdisc;
q->qdisc = new;
if (*old) {
qdisc_tree_decrease_qlen(*old, (*old)->q.qlen);
qdisc_reset(*old);
}
sch_tree_unlock(sch);
*old = qdisc_replace(sch, new, &q->qdisc);
return 0;
}