Openwrt/target/linux/generic/hack-5.4/661-use_fq_codel_by_default.patch

From 1d418f7e88035ed7a94073f6354246c66e9193e9 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 7 Jul 2017 17:22:58 +0200
Subject: fq_codel: switch default qdisc from pfifo_fast to fq_codel and remove pfifo_fast

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 include/net/sch_generic.h | 3 ++-
 net/sched/Kconfig         | 3 ++-
 net/sched/sch_api.c       | 2 +-
 net/sched/sch_fq_codel.c  | 3 ++-
 net/sched/sch_generic.c   | 4 ++--
 5 files changed, 9 insertions(+), 6 deletions(-)

--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -570,12 +570,13 @@ extern struct Qdisc_ops noop_qdisc_ops;
 extern struct Qdisc_ops pfifo_fast_ops;
 extern struct Qdisc_ops mq_qdisc_ops;
 extern struct Qdisc_ops noqueue_qdisc_ops;
+extern struct Qdisc_ops fq_codel_qdisc_ops;
 extern const struct Qdisc_ops *default_qdisc_ops;
 static inline const struct Qdisc_ops *
 get_default_qdisc_ops(const struct net_device *dev, int ntx)
 {
 	return ntx < dev->real_num_tx_queues ?
-			default_qdisc_ops : &pfifo_fast_ops;
+			default_qdisc_ops : &fq_codel_qdisc_ops;
 }
 
 struct Qdisc_class_common {
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -4,8 +4,9 @@
 #
 
 menuconfig NET_SCHED
-	bool "QoS and/or fair queueing"
+	def_bool y
 	select NET_SCH_FIFO
+	select NET_SCH_FQ_CODEL
 	---help---
 	  When the kernel has several packets to send out over a network
 	  device, it has to decide which ones to send first, which ones to
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -2271,7 +2271,7 @@ static int __init pktsched_init(void)
 		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);
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -702,7 +702,7 @@ static const struct Qdisc_class_ops fq_c
 	.walk		=	fq_codel_walk,
 };
 
-static struct Qdisc_ops fq_codel_qdisc_ops __read_mostly = {
+struct Qdisc_ops fq_codel_qdisc_ops __read_mostly = {
 	.cl_ops		=	&fq_codel_class_ops,
 	.id		=	"fq_codel",
 	.priv_size	=	sizeof(struct fq_codel_sched_data),
@@ -717,6 +717,7 @@ static struct Qdisc_ops fq_codel_qdisc_o
 	.dump_stats =	fq_codel_dump_stats,
 	.owner		=	THIS_MODULE,
 };
+EXPORT_SYMBOL(fq_codel_qdisc_ops);
 
 static int __init fq_codel_module_init(void)
 {
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -32,7 +32,7 @@
 #include <net/xfrm.h>
 
 /* Qdisc to use by default */
-const struct Qdisc_ops *default_qdisc_ops = &pfifo_fast_ops;
+const struct Qdisc_ops *default_qdisc_ops = &fq_codel_qdisc_ops;
 EXPORT_SYMBOL(default_qdisc_ops);
 
 /* Main transmission queue. */
@@ -1035,12 +1035,12 @@ static void attach_one_default_qdisc(str
 				     void *_unused)
 {
 	struct Qdisc *qdisc;
-	const struct Qdisc_ops *ops = default_qdisc_ops;
+	const struct Qdisc_ops *ops = &fq_codel_qdisc_ops;
 
 	if (dev->priv_flags & IFF_NO_QUEUE)
 		ops = &noqueue_qdisc_ops;
 	else if(dev->type == ARPHRD_CAN)
-		ops = &pfifo_fast_ops;
+		ops = &fq_codel_qdisc_ops;
 
 	qdisc = qdisc_create_dflt(dev_queue, ops, TC_H_ROOT, NULL);
 	if (!qdisc) {