[NET]: Add inline intent commentary to dev_alloc_skb().

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/skbuff.c

@@ -277,6 +277,10 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
  */
 struct sk_buff *dev_alloc_skb(unsigned int length)
 {
+	/*
+	 * There is more code here than it seems:
+	 * __def_alloc_skb is an inline
+	 */
 	return __dev_alloc_skb(length, GFP_ATOMIC);
 }
 EXPORT_SYMBOL(dev_alloc_skb);