[NET]: Hide the queue_mapping field inside netif_subqueue_stopped

Many places get the queue_mapping field from skb to pass it to the
netif_subqueue_stopped() which will be 0 in any case.

Make the helper that works with sk_buff
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -996,7 +996,7 @@ static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
  *
  * Check individual transmit queue of a device with multiple transmit queues.
  */
-static inline int netif_subqueue_stopped(const struct net_device *dev,
+static inline int __netif_subqueue_stopped(const struct net_device *dev,
 					 u16 queue_index)
 {
 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
@@ -1007,6 +1007,11 @@ static inline int netif_subqueue_stopped(const struct net_device *dev,
 #endif
 }
 
+static inline int netif_subqueue_stopped(const struct net_device *dev,
+					 struct sk_buff *skb)
+{
+	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
+}
 
 /**
  *	netif_wake_subqueue - allow sending packets on subqueue

net/core/dev.c

@@ -1553,7 +1553,7 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 			return rc;
 		}
 		if (unlikely((netif_queue_stopped(dev) ||
-			     netif_subqueue_stopped(dev, skb->queue_mapping)) &&
+			     netif_subqueue_stopped(dev, skb)) &&
 			     skb->next))
 			return NETDEV_TX_BUSY;
 	} while (skb->next);
@@ -1692,7 +1692,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 			HARD_TX_LOCK(dev, cpu);
 
 			if (!netif_queue_stopped(dev) &&
-			    !netif_subqueue_stopped(dev, skb->queue_mapping)) {
+			    !netif_subqueue_stopped(dev, skb)) {
 				rc = 0;
 				if (!dev_hard_start_xmit(skb, dev)) {
 					HARD_TX_UNLOCK(dev);

net/core/netpoll.c

@@ -67,7 +67,7 @@ static void queue_process(struct work_struct *work)
 		local_irq_save(flags);
 		netif_tx_lock(dev);
 		if ((netif_queue_stopped(dev) ||
-		     netif_subqueue_stopped(dev, skb->queue_mapping)) ||
+		     netif_subqueue_stopped(dev, skb)) ||
 		     dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) {
 			skb_queue_head(&npinfo->txq, skb);
 			netif_tx_unlock(dev);
@@ -269,7 +269,7 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 		     tries > 0; --tries) {
 			if (netif_tx_trylock(dev)) {
 				if (!netif_queue_stopped(dev) &&
-				    !netif_subqueue_stopped(dev, skb->queue_mapping))
+				    !netif_subqueue_stopped(dev, skb))
 					status = dev->hard_start_xmit(skb, dev);
 				netif_tx_unlock(dev);
 

net/core/pktgen.c

@@ -3383,7 +3383,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
 
 	if ((netif_queue_stopped(odev) ||
 	     (pkt_dev->skb &&
-	      netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping))) ||
+	      netif_subqueue_stopped(odev, pkt_dev->skb))) ||
 	    need_resched()) {
 		idle_start = getCurUs();
 
@@ -3400,7 +3400,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
 		pkt_dev->idle_acc += getCurUs() - idle_start;
 
 		if (netif_queue_stopped(odev) ||
-		    netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
+		    netif_subqueue_stopped(odev, pkt_dev->skb)) {
 			pkt_dev->next_tx_us = getCurUs();	/* TODO */
 			pkt_dev->next_tx_ns = 0;
 			goto out;	/* Try the next interface */
@@ -3429,7 +3429,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
 
 	netif_tx_lock_bh(odev);
 	if (!netif_queue_stopped(odev) &&
-	    !netif_subqueue_stopped(odev, pkt_dev->skb->queue_mapping)) {
+	    !netif_subqueue_stopped(odev, pkt_dev->skb)) {
 
 		atomic_inc(&(pkt_dev->skb->users));
 	      retry_now:

net/sched/sch_teql.c

@@ -284,7 +284,7 @@ static int teql_master_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (slave->qdisc_sleeping != q)
 			continue;
 		if (netif_queue_stopped(slave) ||
-		    netif_subqueue_stopped(slave, subq) ||
+		    __netif_subqueue_stopped(slave, subq) ||
 		    !netif_running(slave)) {
 			busy = 1;
 			continue;
@@ -294,7 +294,7 @@ static int teql_master_xmit(struct sk_buff *skb, struct net_device *dev)
 		case 0:
 			if (netif_tx_trylock(slave)) {
 				if (!netif_queue_stopped(slave) &&
-				    !netif_subqueue_stopped(slave, subq) &&
+				    !__netif_subqueue_stopped(slave, subq) &&
 				    slave->hard_start_xmit(skb, slave) == 0) {
 					netif_tx_unlock(slave);
 					master->slaves = NEXT_SLAVE(q);