1 files changed, 8 insertions, 19 deletions

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 511323e..aefc150 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -324,24 +324,6 @@ void netif_carrier_off(struct net_device *dev)
 }
 EXPORT_SYMBOL(netif_carrier_off);
 
-/**
- * 	netif_notify_peers - notify network peers about existence of @dev
- * 	@dev: network device
- *
- * Generate traffic such that interested network peers are aware of
- * @dev, such as by generating a gratuitous ARP. This may be used when
- * a device wants to inform the rest of the network about some sort of
- * reconfiguration such as a failover event or virtual machine
- * migration.
- */
-void netif_notify_peers(struct net_device *dev)
-{
-	rtnl_lock();
-	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, dev);
-	rtnl_unlock();
-}
-EXPORT_SYMBOL(netif_notify_peers);
-
 /* "NOOP" scheduler: the best scheduler, recommended for all interfaces
    under all circumstances. It is difficult to invent anything faster or
    cheaper.
@@ -545,6 +527,8 @@ struct Qdisc_ops pfifo_fast_ops __read_mostly = {
 };
 EXPORT_SYMBOL(pfifo_fast_ops);
 
+static struct lock_class_key qdisc_tx_busylock;
+
 struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
 			  struct Qdisc_ops *ops)
 {
@@ -552,6 +536,7 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
 	struct Qdisc *sch;
 	unsigned int size = QDISC_ALIGN(sizeof(*sch)) + ops->priv_size;
 	int err = -ENOBUFS;
+	struct net_device *dev = dev_queue->dev;
 
 	p = kzalloc_node(size, GFP_KERNEL,
 			 netdev_queue_numa_node_read(dev_queue));
@@ -571,12 +556,16 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
 	}
 	INIT_LIST_HEAD(&sch->list);
 	skb_queue_head_init(&sch->q);
+
 	spin_lock_init(&sch->busylock);
+	lockdep_set_class(&sch->busylock,
+			  dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
+
 	sch->ops = ops;
 	sch->enqueue = ops->enqueue;
 	sch->dequeue = ops->dequeue;
 	sch->dev_queue = dev_queue;
-	dev_hold(qdisc_dev(sch));
+	dev_hold(dev);
 	atomic_set(&sch->refcnt, 1);
 
 	return sch;