[NET]: Kill netdev->last_stats

Old debugging code we no longer need.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/sk98lin/skge.c

@@ -4956,7 +4956,6 @@ static int __devinit skge_probe_one(struct pci_dev *pdev,
 	dev->stop =		&SkGeClose;
 	dev->hard_start_xmit =	&SkGeXmit;
 	dev->get_stats =	&SkGeStats;
-	dev->last_stats =	&SkGeStats;
 	dev->set_multicast_list = &SkGeSetRxMode;
 	dev->set_mac_address =	&SkGeSetMacAddr;
 	dev->do_ioctl =		&SkGeIoctl;

include/linux/netdevice.h

@@ -479,7 +479,6 @@ struct net_device
 
 	/* class/net/name entry */
 	struct class_device	class_dev;
-	struct net_device_stats* (*last_stats)(struct net_device *);
 	/* how much padding had been added by alloc_netdev() */
 	int padded;
 };

net/core/dev.c

@@ -861,18 +861,6 @@ static int default_rebuild_header(struct sk_buff *skb)
 }
 
 
-/*
- * Some old buggy device drivers change get_stats after registering
- * the device.  Try and trap them here.
- * This can be elimnated when all devices are known fixed.
- */
-static inline int get_stats_changed(struct net_device *dev)
-{
-	int changed = dev->last_stats != dev->get_stats;
-	dev->last_stats = dev->get_stats;
-	return changed;
-}
-
 /**
  *	dev_open	- prepare an interface for use.
  *	@dev:	device to open
@@ -896,14 +884,6 @@ int dev_open(struct net_device *dev)
 	if (dev->flags & IFF_UP)
 		return 0;
 
-	/*
-	 *	 Check for broken device drivers.
-	 */
-	if (get_stats_changed(dev) && net_ratelimit()) {
-		printk(KERN_ERR "%s: driver changed get_stats after register\n",
-		       dev->name);
-	}
-
 	/*
 	 *	Is it even present?
 	 */
@@ -920,14 +900,6 @@ int dev_open(struct net_device *dev)
 			clear_bit(__LINK_STATE_START, &dev->state);
 	}
 
-	/*
-	 * 	Check for more broken device drivers.
-	 */
-	if (get_stats_changed(dev) && net_ratelimit()) {
-		printk(KERN_ERR "%s: driver changed get_stats in open\n",
-		       dev->name);
-	}
-
  	/*
 	 *	If it went open OK then:
 	 */

net/core/net-sysfs.c

@@ -408,7 +408,6 @@ int netdev_register_sysfs(struct net_device *net)
 
 	class_dev->class = &net_class;
 	class_dev->class_data = net;
-	net->last_stats = net->get_stats;
 
 	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
 	if ((ret = class_device_register(class_dev)))