netdev: Move queue_lock into struct netdev_queue.

The lock is now an attribute of the device queue.

One thing to notice is that "suspicious" places
emerge which will need specific training about
multiple queue handling.  They are so marked with
explicit "netdev->rx_queue" and "netdev->tx_queue"
references.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/sch_cbq.c

@@ -1746,10 +1746,10 @@ static void cbq_put(struct Qdisc *sch, unsigned long arg)
 #ifdef CONFIG_NET_CLS_ACT
 		struct cbq_sched_data *q = qdisc_priv(sch);
 
-		spin_lock_bh(&qdisc_dev(sch)->queue_lock);
+		spin_lock_bh(&sch->dev_queue->lock);
 		if (q->rx_class == cl)
 			q->rx_class = NULL;
-		spin_unlock_bh(&qdisc_dev(sch)->queue_lock);
+		spin_unlock_bh(&sch->dev_queue->lock);
 #endif
 
 		cbq_destroy_class(sch, cl);
@@ -1828,7 +1828,7 @@ cbq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, struct nlattr **t
 
 		if (tca[TCA_RATE])
 			gen_replace_estimator(&cl->bstats, &cl->rate_est,
-					      &qdisc_dev(sch)->queue_lock,
+					      &sch->dev_queue->lock,
 					      tca[TCA_RATE]);
 		return 0;
 	}
@@ -1919,7 +1919,7 @@ cbq_change_class(struct Qdisc *sch, u32 classid, u32 parentid, struct nlattr **t
 
 	if (tca[TCA_RATE])
 		gen_new_estimator(&cl->bstats, &cl->rate_est,
-				  &qdisc_dev(sch)->queue_lock, tca[TCA_RATE]);
+				  &sch->dev_queue->lock, tca[TCA_RATE]);
 
 	*arg = (unsigned long)cl;
 	return 0;