Merge branch 'net-checkpatch'

Tobin C. Harding says:

====================
Whitespace checkpatch fixes

This patch set fixes various whitespace checkpatch errors and warnings.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -1,5 +1,5 @@
 /*
- * 	NET3	Protocol independent device support routines.
+ *      NET3    Protocol independent device support routines.
  *
  *		This program is free software; you can redistribute it and/or
  *		modify it under the terms of the GNU General Public License
@@ -7,7 +7,7 @@
  *		2 of the License, or (at your option) any later version.
  *
  *	Derived from the non IP parts of dev.c 1.0.19
- * 		Authors:	Ross Biro
+ *              Authors:	Ross Biro
  *				Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  *				Mark Evans, <evansmp@uhura.aston.ac.uk>
  *
@@ -21,9 +21,9 @@
  *
  *	Changes:
  *              D.J. Barrow     :       Fixed bug where dev->refcnt gets set
- *              			to 2 if register_netdev gets called
- *              			before net_dev_init & also removed a
- *              			few lines of code in the process.
+ *                                      to 2 if register_netdev gets called
+ *                                      before net_dev_init & also removed a
+ *                                      few lines of code in the process.
  *		Alan Cox	:	device private ioctl copies fields back.
  *		Alan Cox	:	Transmit queue code does relevant
  *					stunts to keep the queue safe.
@@ -36,7 +36,7 @@
  *		Alan Cox	:	100 backlog just doesn't cut it when
  *					you start doing multicast video 8)
  *		Alan Cox	:	Rewrote net_bh and list manager.
- *		Alan Cox	: 	Fix ETH_P_ALL echoback lengths.
+ *              Alan Cox        :       Fix ETH_P_ALL echoback lengths.
  *		Alan Cox	:	Took out transmit every packet pass
  *					Saved a few bytes in the ioctl handler
  *		Alan Cox	:	Network driver sets packet type before
@@ -46,7 +46,7 @@
  *		Richard Kooijman:	Timestamp fixes.
  *		Alan Cox	:	Wrong field in SIOCGIFDSTADDR
  *		Alan Cox	:	Device lock protection.
- *		Alan Cox	: 	Fixed nasty side effect of device close
+ *              Alan Cox        :       Fixed nasty side effect of device close
  *					changes.
  *		Rudi Cilibrasi	:	Pass the right thing to
  *					set_mac_address()
@@ -67,8 +67,8 @@
  *	Paul Rusty Russell	:	SIOCSIFNAME
  *              Pekka Riikonen  :	Netdev boot-time settings code
  *              Andrew Morton   :       Make unregister_netdevice wait
- *              			indefinitely on dev->refcnt
- * 		J Hadi Salim	:	- Backlog queue sampling
+ *                                      indefinitely on dev->refcnt
+ *              J Hadi Salim    :       - Backlog queue sampling
  *				        - netif_rx() feedback
  */
 
@@ -192,7 +192,8 @@ static seqcount_t devnet_rename_seq;
 
 static inline void dev_base_seq_inc(struct net *net)
 {
-	while (++net->dev_base_seq == 0);
+	while (++net->dev_base_seq == 0)
+		;
 }
 
 static inline struct hlist_head *dev_name_hash(struct net *net, const char *name)
@@ -274,8 +275,8 @@ EXPORT_PER_CPU_SYMBOL(softnet_data);
  * register_netdevice() inits txq->_xmit_lock and sets lockdep class
  * according to dev->type
  */
-static const unsigned short netdev_lock_type[] =
-	{ARPHRD_NETROM, ARPHRD_ETHER, ARPHRD_EETHER, ARPHRD_AX25,
+static const unsigned short netdev_lock_type[] = {
+	 ARPHRD_NETROM, ARPHRD_ETHER, ARPHRD_EETHER, ARPHRD_AX25,
 	 ARPHRD_PRONET, ARPHRD_CHAOS, ARPHRD_IEEE802, ARPHRD_ARCNET,
 	 ARPHRD_APPLETLK, ARPHRD_DLCI, ARPHRD_ATM, ARPHRD_METRICOM,
 	 ARPHRD_IEEE1394, ARPHRD_EUI64, ARPHRD_INFINIBAND, ARPHRD_SLIP,
@@ -291,22 +292,22 @@ static const unsigned short netdev_lock_type[] =
 	 ARPHRD_IEEE80211_RADIOTAP, ARPHRD_PHONET, ARPHRD_PHONET_PIPE,
 	 ARPHRD_IEEE802154, ARPHRD_VOID, ARPHRD_NONE};
 
-static const char *const netdev_lock_name[] =
-	{"_xmit_NETROM", "_xmit_ETHER", "_xmit_EETHER", "_xmit_AX25",
-	 "_xmit_PRONET", "_xmit_CHAOS", "_xmit_IEEE802", "_xmit_ARCNET",
-	 "_xmit_APPLETLK", "_xmit_DLCI", "_xmit_ATM", "_xmit_METRICOM",
-	 "_xmit_IEEE1394", "_xmit_EUI64", "_xmit_INFINIBAND", "_xmit_SLIP",
-	 "_xmit_CSLIP", "_xmit_SLIP6", "_xmit_CSLIP6", "_xmit_RSRVD",
-	 "_xmit_ADAPT", "_xmit_ROSE", "_xmit_X25", "_xmit_HWX25",
-	 "_xmit_PPP", "_xmit_CISCO", "_xmit_LAPB", "_xmit_DDCMP",
-	 "_xmit_RAWHDLC", "_xmit_TUNNEL", "_xmit_TUNNEL6", "_xmit_FRAD",
-	 "_xmit_SKIP", "_xmit_LOOPBACK", "_xmit_LOCALTLK", "_xmit_FDDI",
-	 "_xmit_BIF", "_xmit_SIT", "_xmit_IPDDP", "_xmit_IPGRE",
-	 "_xmit_PIMREG", "_xmit_HIPPI", "_xmit_ASH", "_xmit_ECONET",
-	 "_xmit_IRDA", "_xmit_FCPP", "_xmit_FCAL", "_xmit_FCPL",
-	 "_xmit_FCFABRIC", "_xmit_IEEE80211", "_xmit_IEEE80211_PRISM",
-	 "_xmit_IEEE80211_RADIOTAP", "_xmit_PHONET", "_xmit_PHONET_PIPE",
-	 "_xmit_IEEE802154", "_xmit_VOID", "_xmit_NONE"};
+static const char *const netdev_lock_name[] = {
+	"_xmit_NETROM", "_xmit_ETHER", "_xmit_EETHER", "_xmit_AX25",
+	"_xmit_PRONET", "_xmit_CHAOS", "_xmit_IEEE802", "_xmit_ARCNET",
+	"_xmit_APPLETLK", "_xmit_DLCI", "_xmit_ATM", "_xmit_METRICOM",
+	"_xmit_IEEE1394", "_xmit_EUI64", "_xmit_INFINIBAND", "_xmit_SLIP",
+	"_xmit_CSLIP", "_xmit_SLIP6", "_xmit_CSLIP6", "_xmit_RSRVD",
+	"_xmit_ADAPT", "_xmit_ROSE", "_xmit_X25", "_xmit_HWX25",
+	"_xmit_PPP", "_xmit_CISCO", "_xmit_LAPB", "_xmit_DDCMP",
+	"_xmit_RAWHDLC", "_xmit_TUNNEL", "_xmit_TUNNEL6", "_xmit_FRAD",
+	"_xmit_SKIP", "_xmit_LOOPBACK", "_xmit_LOCALTLK", "_xmit_FDDI",
+	"_xmit_BIF", "_xmit_SIT", "_xmit_IPDDP", "_xmit_IPGRE",
+	"_xmit_PIMREG", "_xmit_HIPPI", "_xmit_ASH", "_xmit_ECONET",
+	"_xmit_IRDA", "_xmit_FCPP", "_xmit_FCAL", "_xmit_FCPL",
+	"_xmit_FCFABRIC", "_xmit_IEEE80211", "_xmit_IEEE80211_PRISM",
+	"_xmit_IEEE80211_RADIOTAP", "_xmit_PHONET", "_xmit_PHONET_PIPE",
+	"_xmit_IEEE802154", "_xmit_VOID", "_xmit_NONE"};
 
 static struct lock_class_key netdev_xmit_lock_key[ARRAY_SIZE(netdev_lock_type)];
 static struct lock_class_key netdev_addr_lock_key[ARRAY_SIZE(netdev_lock_type)];
@@ -352,10 +353,11 @@ static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
 #endif
 
 /*******************************************************************************
+ *
+ *		Protocol management and registration routines
+ *
+ *******************************************************************************/
 
-		Protocol management and registration routines
-
-*******************************************************************************/
 
 /*
  *	Add a protocol ID to the list. Now that the input handler is
@@ -538,10 +540,10 @@ void dev_remove_offload(struct packet_offload *po)
 EXPORT_SYMBOL(dev_remove_offload);
 
 /******************************************************************************
-
-		      Device Boot-time Settings Routines
-
-*******************************************************************************/
+ *
+ *		      Device Boot-time Settings Routines
+ *
+ ******************************************************************************/
 
 /* Boot time configuration table */
 static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
@@ -574,13 +576,13 @@ static int netdev_boot_setup_add(char *name, struct ifmap *map)
 }
 
 /**
- *	netdev_boot_setup_check	- check boot time settings
- *	@dev: the netdevice
+ * netdev_boot_setup_check	- check boot time settings
+ * @dev: the netdevice
  *
- * 	Check boot time settings for the device.
- *	The found settings are set for the device to be used
- *	later in the device probing.
- *	Returns 0 if no settings found, 1 if they are.
+ * Check boot time settings for the device.
+ * The found settings are set for the device to be used
+ * later in the device probing.
+ * Returns 0 if no settings found, 1 if they are.
  */
 int netdev_boot_setup_check(struct net_device *dev)
 {
@@ -590,10 +592,10 @@ int netdev_boot_setup_check(struct net_device *dev)
 	for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
 		if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
 		    !strcmp(dev->name, s[i].name)) {
-			dev->irq 	= s[i].map.irq;
-			dev->base_addr 	= s[i].map.base_addr;
-			dev->mem_start 	= s[i].map.mem_start;
-			dev->mem_end 	= s[i].map.mem_end;
+			dev->irq = s[i].map.irq;
+			dev->base_addr = s[i].map.base_addr;
+			dev->mem_start = s[i].map.mem_start;
+			dev->mem_end = s[i].map.mem_end;
 			return 1;
 		}
 	}
@@ -603,14 +605,14 @@ EXPORT_SYMBOL(netdev_boot_setup_check);
 
 
 /**
- *	netdev_boot_base	- get address from boot time settings
- *	@prefix: prefix for network device
- *	@unit: id for network device
+ * netdev_boot_base	- get address from boot time settings
+ * @prefix: prefix for network device
+ * @unit: id for network device
  *
- * 	Check boot time settings for the base address of device.
- *	The found settings are set for the device to be used
- *	later in the device probing.
- *	Returns 0 if no settings found.
+ * Check boot time settings for the base address of device.
+ * The found settings are set for the device to be used
+ * later in the device probing.
+ * Returns 0 if no settings found.
  */
 unsigned long netdev_boot_base(const char *prefix, int unit)
 {
@@ -663,10 +665,10 @@ int __init netdev_boot_setup(char *str)
 __setup("netdev=", netdev_boot_setup);
 
 /*******************************************************************************
-
-			    Device Interface Subroutines
-
-*******************************************************************************/
+ *
+ *			    Device Interface Subroutines
+ *
+ *******************************************************************************/
 
 /**
  *	dev_get_iflink	- get 'iflink' value of a interface
@@ -737,15 +739,15 @@ struct net_device *__dev_get_by_name(struct net *net, const char *name)
 EXPORT_SYMBOL(__dev_get_by_name);
 
 /**
- *	dev_get_by_name_rcu	- find a device by its name
- *	@net: the applicable net namespace
- *	@name: name to find
+ * dev_get_by_name_rcu	- find a device by its name
+ * @net: the applicable net namespace
+ * @name: name to find
  *
- *	Find an interface by name.
- *	If the name is found a pointer to the device is returned.
- * 	If the name is not found then %NULL is returned.
- *	The reference counters are not incremented so the caller must be
- *	careful with locks. The caller must hold RCU lock.
+ * Find an interface by name.
+ * If the name is found a pointer to the device is returned.
+ * If the name is not found then %NULL is returned.
+ * The reference counters are not incremented so the caller must be
+ * careful with locks. The caller must hold RCU lock.
  */
 
 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name)
@@ -1289,8 +1291,8 @@ void netdev_state_change(struct net_device *dev)
 EXPORT_SYMBOL(netdev_state_change);
 
 /**
- * 	netdev_notify_peers - notify network peers about existence of @dev
- * 	@dev: network device
+ * netdev_notify_peers - notify network peers about existence of @dev
+ * @dev: network device
  *
  * Generate traffic such that interested network peers are aware of
  * @dev, such as by generating a gratuitous ARP. This may be used when
@@ -1518,17 +1520,17 @@ static int call_netdevice_notifier(struct notifier_block *nb, unsigned long val,
 static int dev_boot_phase = 1;
 
 /**
- *	register_netdevice_notifier - register a network notifier block
- *	@nb: notifier
+ * register_netdevice_notifier - register a network notifier block
+ * @nb: notifier
  *
- *	Register a notifier to be called when network device events occur.
- *	The notifier passed is linked into the kernel structures and must
- *	not be reused until it has been unregistered. A negative errno code
- *	is returned on a failure.
+ * Register a notifier to be called when network device events occur.
+ * The notifier passed is linked into the kernel structures and must
+ * not be reused until it has been unregistered. A negative errno code
+ * is returned on a failure.
  *
- * 	When registered all registration and up events are replayed
- *	to the new notifier to allow device to have a race free
- *	view of the network device list.
+ * When registered all registration and up events are replayed
+ * to the new notifier to allow device to have a race free
+ * view of the network device list.
  */
 
 int register_netdevice_notifier(struct notifier_block *nb)
@@ -1585,17 +1587,17 @@ outroll:
 EXPORT_SYMBOL(register_netdevice_notifier);
 
 /**
- *	unregister_netdevice_notifier - unregister a network notifier block
- *	@nb: notifier
+ * unregister_netdevice_notifier - unregister a network notifier block
+ * @nb: notifier
  *
- *	Unregister a notifier previously registered by
- *	register_netdevice_notifier(). The notifier is unlinked into the
- *	kernel structures and may then be reused. A negative errno code
- *	is returned on a failure.
+ * Unregister a notifier previously registered by
+ * register_netdevice_notifier(). The notifier is unlinked into the
+ * kernel structures and may then be reused. A negative errno code
+ * is returned on a failure.
  *
- * 	After unregistering unregister and down device events are synthesized
- *	for all devices on the device list to the removed notifier to remove
- *	the need for special case cleanup code.
+ * After unregistering unregister and down device events are synthesized
+ * for all devices on the device list to the removed notifier to remove
+ * the need for special case cleanup code.
  */
 
 int unregister_netdevice_notifier(struct notifier_block *nb)
@@ -2496,6 +2498,7 @@ u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
 
 	if (dev->num_tc) {
 		u8 tc = netdev_get_prio_tc_map(dev, skb->priority);
+
 		qoffset = dev->tc_to_txq[tc].offset;
 		qcount = dev->tc_to_txq[tc].count;
 	}
@@ -2717,9 +2720,11 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
 {
 #ifdef CONFIG_HIGHMEM
 	int i;
+
 	if (!(dev->features & NETIF_F_HIGHDMA)) {
 		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
 			if (PageHighMem(skb_frag_page(frag)))
 				return 1;
 		}
@@ -2733,6 +2738,7 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
 		for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 			skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 			dma_addr_t addr = page_to_phys(skb_frag_page(frag));
+
 			if (!pdev->dma_mask || addr + PAGE_SIZE - 1 > *pdev->dma_mask)
 				return 1;
 		}
@@ -3208,6 +3214,7 @@ static u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb)
 	if (queue_index < 0 || skb->ooo_okay ||
 	    queue_index >= dev->real_num_tx_queues) {
 		int new_index = get_xps_queue(dev, skb);
+
 		if (new_index < 0)
 			new_index = skb_tx_hash(dev, skb);
 
@@ -3237,6 +3244,7 @@ struct netdev_queue *netdev_pick_tx(struct net_device *dev,
 
 	if (dev->real_num_tx_queues != 1) {
 		const struct net_device_ops *ops = dev->netdev_ops;
+
 		if (ops->ndo_select_queue)
 			queue_index = ops->ndo_select_queue(dev, skb, accel_priv,
 							    __netdev_pick_tx);
@@ -3325,16 +3333,16 @@ static int __dev_queue_xmit(struct sk_buff *skb, void *accel_priv)
 	}
 
 	/* The device has no queue. Common case for software devices:
-	   loopback, all the sorts of tunnels...
+	 * loopback, all the sorts of tunnels...
 
-	   Really, it is unlikely that netif_tx_lock protection is necessary
-	   here.  (f.e. loopback and IP tunnels are clean ignoring statistics
-	   counters.)
-	   However, it is possible, that they rely on protection
-	   made by us here.
+	 * Really, it is unlikely that netif_tx_lock protection is necessary
+	 * here.  (f.e. loopback and IP tunnels are clean ignoring statistics
+	 * counters.)
+	 * However, it is possible, that they rely on protection
+	 * made by us here.
 
-	   Check this and shot the lock. It is not prone from deadlocks.
-	   Either shot noqueue qdisc, it is even simpler 8)
+	 * Check this and shot the lock. It is not prone from deadlocks.
+	 *Either shot noqueue qdisc, it is even simpler 8)
 	 */
 	if (dev->flags & IFF_UP) {
 		int cpu = smp_processor_id(); /* ok because BHs are off */
@@ -3396,9 +3404,9 @@ int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv)
 EXPORT_SYMBOL(dev_queue_xmit_accel);
 
 
-/*=======================================================================
-			Receiver routines
-  =======================================================================*/
+/*************************************************************************
+ *			Receiver routines
+ *************************************************************************/
 
 int netdev_max_backlog __read_mostly = 1000;
 EXPORT_SYMBOL(netdev_max_backlog);
@@ -3766,6 +3774,7 @@ static int netif_rx_internal(struct sk_buff *skb)
 #endif
 	{
 		unsigned int qtail;
+
 		ret = enqueue_to_backlog(skb, get_cpu(), &qtail);
 		put_cpu();
 	}
@@ -3825,6 +3834,7 @@ static __latent_entropy void net_tx_action(struct softirq_action *h)
 
 		while (clist) {
 			struct sk_buff *skb = clist;
+
 			clist = clist->next;
 
 			WARN_ON(atomic_read(&skb->users));
@@ -5661,6 +5671,7 @@ static int netdev_adjacent_sysfs_add(struct net_device *dev,
 			      struct list_head *dev_list)
 {
 	char linkname[IFNAMSIZ+7];
+
 	sprintf(linkname, dev_list == &dev->adj_list.upper ?
 		"upper_%s" : "lower_%s", adj_dev->name);
 	return sysfs_create_link(&(dev->dev.kobj), &(adj_dev->dev.kobj),
@@ -5671,6 +5682,7 @@ static void netdev_adjacent_sysfs_del(struct net_device *dev,
 			       struct list_head *dev_list)
 {
 	char linkname[IFNAMSIZ+7];
+
 	sprintf(linkname, dev_list == &dev->adj_list.upper ?
 		"upper_%s" : "lower_%s", name);
 	sysfs_remove_link(&(dev->dev.kobj), linkname);
@@ -5940,6 +5952,7 @@ void netdev_upper_dev_unlink(struct net_device *dev,
 			     struct net_device *upper_dev)
 {
 	struct netdev_notifier_changeupper_info changeupper_info;
+
 	ASSERT_RTNL();
 
 	changeupper_info.upper_dev = upper_dev;
@@ -6358,8 +6371,8 @@ int __dev_change_flags(struct net_device *dev, unsigned int flags)
 	}
 
 	/* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
-	   is important. Some (broken) drivers set IFF_PROMISC, when
-	   IFF_ALLMULTI is requested not asking us and not reporting.
+	 * is important. Some (broken) drivers set IFF_PROMISC, when
+	 * IFF_ALLMULTI is requested not asking us and not reporting.
 	 */
 	if ((flags ^ dev->gflags) & IFF_ALLMULTI) {
 		int inc = (flags & IFF_ALLMULTI) ? 1 : -1;
@@ -6657,6 +6670,7 @@ EXPORT_SYMBOL(dev_change_xdp_fd);
 static int dev_new_index(struct net *net)
 {
 	int ifindex = net->ifindex;
+
 	for (;;) {
 		if (++ifindex <= 0)
 			ifindex = 1;
@@ -6723,8 +6737,8 @@ static void rollback_registered_many(struct list_head *head)
 
 
 		/* Notify protocols, that we are about to destroy
-		   this device. They should clean all the things.
-		*/
+		 * this device. They should clean all the things.
+		 */
 		call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 
 		if (!dev->rtnl_link_ops ||
@@ -7070,6 +7084,7 @@ void netif_tx_stop_all_queues(struct net_device *dev)
 
 	for (i = 0; i < dev->num_tx_queues; i++) {
 		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
+
 		netif_tx_stop_queue(txq);
 	}
 }
@@ -7544,17 +7559,17 @@ void netdev_freemem(struct net_device *dev)
 }
 
 /**
- *	alloc_netdev_mqs - allocate network device
- *	@sizeof_priv:		size of private data to allocate space for
- *	@name:			device name format string
- *	@name_assign_type: 	origin of device name
- *	@setup:			callback to initialize device
- *	@txqs:			the number of TX subqueues to allocate
- *	@rxqs:			the number of RX subqueues to allocate
- *
- *	Allocates a struct net_device with private data area for driver use
- *	and performs basic initialization.  Also allocates subqueue structs
- *	for each queue on the device.
+ * alloc_netdev_mqs - allocate network device
+ * @sizeof_priv: size of private data to allocate space for
+ * @name: device name format string
+ * @name_assign_type: origin of device name
+ * @setup: callback to initialize device
+ * @txqs: the number of TX subqueues to allocate
+ * @rxqs: the number of RX subqueues to allocate
+ *
+ * Allocates a struct net_device with private data area for driver use
+ * and performs basic initialization.  Also allocates subqueue structs
+ * for each queue on the device.
  */
 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
 		unsigned char name_assign_type,
@@ -7666,13 +7681,13 @@ free_dev:
 EXPORT_SYMBOL(alloc_netdev_mqs);
 
 /**
- *	free_netdev - free network device
- *	@dev: device
+ * free_netdev - free network device
+ * @dev: device
  *
- *	This function does the last stage of destroying an allocated device
- * 	interface. The reference to the device object is released.
- *	If this is the last reference then it will be freed.
- *	Must be called in process context.
+ * This function does the last stage of destroying an allocated device
+ * interface. The reference to the device object is released. If this
+ * is the last reference then it will be freed.Must be called in process
+ * context.
  */
 void free_netdev(struct net_device *dev)
 {
@@ -7854,12 +7869,12 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
 	dev_shutdown(dev);
 
 	/* Notify protocols, that we are about to destroy
-	   this device. They should clean all the things.
-
-	   Note that dev->reg_state stays at NETREG_REGISTERED.
-	   This is wanted because this way 8021q and macvlan know
-	   the device is just moving and can keep their slaves up.
-	*/
+	 * this device. They should clean all the things.
+	 *
+	 * Note that dev->reg_state stays at NETREG_REGISTERED.
+	 * This is wanted because this way 8021q and macvlan know
+	 * the device is just moving and can keep their slaves up.
+	 */
 	call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 	rcu_barrier();
 	call_netdevice_notifiers(NETDEV_UNREGISTER_FINAL, dev);