--- zzzz-none-000/linux-4.4.271/net/sched/sch_api.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/net/sched/sch_api.c	2023-04-19 10:22:30.000000000 +0000
@@ -308,6 +308,7 @@
 out:
 	return q;
 }
+EXPORT_SYMBOL(qdisc_lookup);
 
 static struct Qdisc *qdisc_leaf(struct Qdisc *p, u32 classid)
 {
@@ -328,7 +329,7 @@
 
 /* Find queueing discipline by name */
 
-static struct Qdisc_ops *qdisc_lookup_ops(struct nlattr *kind)
+struct Qdisc_ops *qdisc_lookup_ops(struct nlattr *kind)
 {
 	struct Qdisc_ops *q = NULL;
 
@@ -345,6 +346,7 @@
 	}
 	return q;
 }
+EXPORT_SYMBOL(qdisc_lookup_ops);
 
 /* The linklayer setting were not transferred from iproute2, in older
  * versions, and the rate tables lookup systems have been dropped in
@@ -1951,7 +1953,7 @@
 		return err;
 	}
 
-	register_qdisc(&pfifo_fast_ops);
+	register_qdisc(&fq_codel_qdisc_ops);
 	register_qdisc(&pfifo_qdisc_ops);
 	register_qdisc(&bfifo_qdisc_ops);
 	register_qdisc(&pfifo_head_drop_qdisc_ops);