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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-02-25 14:55:00 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-18 17:06:39 -0700 |
| commit | 1188e1403a772d9698c06bcc53c44783536ff09e (patch) | |
| tree | ab35ab1d01739e289a4dee4ca76d16f910801bf9 /include/net | |
| parent | c985780791efec375865c0fbd21794d631c68fce (diff) | |
| download | linux-stable-1188e1403a772d9698c06bcc53c44783536ff09e.tar.gz linux-stable-1188e1403a772d9698c06bcc53c44783536ff09e.tar.bz2 linux-stable-1188e1403a772d9698c06bcc53c44783536ff09e.zip | |
net_sched: introduce qdisc_replace() helper
[ Upstream commit 86a7996cc8a078793670d82ed97d5a99bb4e8496 ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/sch_generic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index b2a8e6338576..4dba2663eaed 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -698,6 +698,23 @@ static inline void qdisc_reset_queue(struct Qdisc *sch) sch->qstats.backlog = 0; } +static inline struct Qdisc *qdisc_replace(struct Qdisc *sch, struct Qdisc *new, + struct Qdisc **pold) +{ + struct Qdisc *old; + + sch_tree_lock(sch); + old = *pold; + *pold = new; + if (old != NULL) { + qdisc_tree_decrease_qlen(old, old->q.qlen); + qdisc_reset(old); + } + sch_tree_unlock(sch); + + return old; +} + static inline unsigned int __qdisc_queue_drop(struct Qdisc *sch, struct sk_buff_head *list) { |