[PATCH net-next 1/3] net/sched: qdisc_qstats_qlen_backlog() runs locklessly

[Eric Dumazet <edumazet@google.com>]

qdisc_qstats_qlen_backlog() can be called without qdisc spinlock being held.

Use qdisc_qlen_lockless() instead of qdisc_qlen().

Add a const qualifier to its first parameter (struct Qdisc *sch).

Fixes: edb09eb17ed8 ("net: sched: do not acquire qdisc spinlock in qdisc/class stats dump")
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 include/net/sch_generic.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 9e6ed92729d282642e17a72cc578f25e1d22e4d9..d0ca932b1871c086f0ba7aad11241742bba0a9d8 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -1070,13 +1070,13 @@ static inline int qdisc_qstats_copy(struct gnet_dump *d, const struct Qdisc *sch
 	return gnet_stats_copy_queue(d, sch->cpu_qstats, &sch->qstats, qlen);
 }
 
-static inline void qdisc_qstats_qlen_backlog(struct Qdisc *sch,  __u32 *qlen,
-					     __u32 *backlog)
+static inline void qdisc_qstats_qlen_backlog(const struct Qdisc *sch,
+					     u32 *qlen, u32 *backlog)
 {
 	struct gnet_stats_queue qstats = { 0 };
 
 	gnet_stats_add_queue(&qstats, sch->cpu_qstats, &sch->qstats);
-	*qlen = qstats.qlen + qdisc_qlen(sch);
+	*qlen = qstats.qlen + qdisc_qlen_lockless(sch);
 	*backlog = qstats.backlog;
 }
 
-- 
2.54.0.563.g4f69b47b94-goog