--- zzzz-none-000/linux-3.10.107/net/sched/sch_fq_codel.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/net/sched/sch_fq_codel.c	2021-11-10 11:53:56.000000000 +0000
@@ -167,6 +167,15 @@
 	return idx;
 }
 
+static unsigned int fq_codel_qdisc_drop(struct Qdisc *sch)
+{
+	unsigned int prev_backlog;
+
+	prev_backlog = sch->qstats.backlog;
+	fq_codel_drop(sch);
+	return prev_backlog - sch->qstats.backlog;
+}
+
 static int fq_codel_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 {
 	struct fq_codel_sched_data *q = qdisc_priv(sch);
@@ -600,7 +609,7 @@
 	.enqueue	=	fq_codel_enqueue,
 	.dequeue	=	fq_codel_dequeue,
 	.peek		=	qdisc_peek_dequeued,
-	.drop		=	fq_codel_drop,
+	.drop		=	fq_codel_qdisc_drop,
 	.init		=	fq_codel_init,
 	.reset		=	fq_codel_reset,
 	.destroy	=	fq_codel_destroy,