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-rw-r--r--include/net/sch_generic.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 636a362..8fdad9f 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -707,6 +707,23 @@ 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)
{
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