netdev: Move next_sched into struct netdev_queue.

We schedule queues, not the device, for output queue processing in BH.

Signed-off-by: David S. Miller <[e-mail]>

include/linux/netdevice.h

···
 	struct Qdisc		*qdisc;
 	struct Qdisc		*qdisc_sleeping;
 	struct list_head	qdisc_list;
+	struct netdev_queue	*next_sched;
 };
 
 /*
···
 #define NETIF_F_V4_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
 #define NETIF_F_V6_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
 #define NETIF_F_ALL_CSUM	(NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
-
-	struct net_device	*next_sched;
 
 	/* Interface index. Unique device identifier	*/
 	int			ifindex;
···
  */
 struct softnet_data
 {
-	struct net_device	*output_queue;
+	struct netdev_queue	*output_queue;
 	struct sk_buff_head	input_pkt_queue;
 	struct list_head	poll_list;
 	struct sk_buff		*completion_queue;

net/core/dev.c

···
 void __netif_schedule(struct net_device *dev)
 {
 	if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
+		struct netdev_queue *txq = &dev->tx_queue;
 		unsigned long flags;
 		struct softnet_data *sd;
 
 		local_irq_save(flags);
 		sd = &__get_cpu_var(softnet_data);
-		dev->next_sched = sd->output_queue;
-		sd->output_queue = dev;
+		txq->next_sched = sd->output_queue;
+		sd->output_queue = txq;
 		raise_softirq_irqoff(NET_TX_SOFTIRQ);
 		local_irq_restore(flags);
 	}
···
 	}
 
 	if (sd->output_queue) {
-		struct net_device *head;
+		struct netdev_queue *head;
 
 		local_irq_disable();
 		head = sd->output_queue;
···
 		local_irq_enable();
 
 		while (head) {
-			struct net_device *dev = head;
-			struct netdev_queue *txq;
+			struct netdev_queue *txq = head;
+			struct net_device *dev = txq->dev;
 			head = head->next_sched;
-
-			txq = &dev->tx_queue;
 
 			smp_mb__before_clear_bit();
 			clear_bit(__LINK_STATE_SCHED, &dev->state);
···
 			    void *ocpu)
 {
 	struct sk_buff **list_skb;
-	struct net_device **list_net;
+	struct netdev_queue **list_net;
 	struct sk_buff *skb;
 	unsigned int cpu, oldcpu = (unsigned long)ocpu;
 	struct softnet_data *sd, *oldsd;