net: core: Make netif_wake_subqueue a wrapper

netif_wake_subqueue() is duplicating the same thing that netif_tx_wake_queue()
does, so make it call it directly after looking up the queue from the index.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -3106,7 +3106,19 @@ static inline bool netif_subqueue_stopped(const struct net_device *dev,
 	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
 }
 
-void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
+/**
+ *	netif_wake_subqueue - allow sending packets on subqueue
+ *	@dev: network device
+ *	@queue_index: sub queue index
+ *
+ * Resume individual transmit queue of a device with multiple transmit queues.
+ */
+static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
+{
+	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
+
+	netif_tx_wake_queue(txq);
+}
 
 #ifdef CONFIG_XPS
 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,

net/core/dev.c

@@ -2408,28 +2408,6 @@ void netif_schedule_queue(struct netdev_queue *txq)
 }
 EXPORT_SYMBOL(netif_schedule_queue);
 
-/**
- *	netif_wake_subqueue - allow sending packets on subqueue
- *	@dev: network device
- *	@queue_index: sub queue index
- *
- * Resume individual transmit queue of a device with multiple transmit queues.
- */
-void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
-{
-	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
-
-	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) {
-		struct Qdisc *q;
-
-		rcu_read_lock();
-		q = rcu_dereference(txq->qdisc);
-		__netif_schedule(q);
-		rcu_read_unlock();
-	}
-}
-EXPORT_SYMBOL(netif_wake_subqueue);
-
 void netif_tx_wake_queue(struct netdev_queue *dev_queue)
 {
 	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) {