[NET]: Cleanup calling netdev notifiers.

The call_netdev_notifiers routine can successfully be used in
the net/core_dev.c itself.

This will save 6 lines of code and 62 ;) bytes of .text section.

62 is rather small, but I have one more patch saving ~30 bytes
from netns code (sent to Eric), so altogether they can save
some more noticeable amount.
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -906,7 +906,7 @@ int dev_change_name(struct net_device *dev, char *newname)
 	hlist_add_head(&dev->name_hlist, dev_name_hash(net, dev->name));
 	write_unlock_bh(&dev_base_lock);
 
-	ret = raw_notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+	ret = call_netdevice_notifiers(NETDEV_CHANGENAME, dev);
 	ret = notifier_to_errno(ret);
 
 	if (ret) {
@@ -932,7 +932,7 @@ int dev_change_name(struct net_device *dev, char *newname)
  */
 void netdev_features_change(struct net_device *dev)
 {
-	raw_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev);
+	call_netdevice_notifiers(NETDEV_FEAT_CHANGE, dev);
 }
 EXPORT_SYMBOL(netdev_features_change);
 
@@ -947,8 +947,7 @@ EXPORT_SYMBOL(netdev_features_change);
 void netdev_state_change(struct net_device *dev)
 {
 	if (dev->flags & IFF_UP) {
-		raw_notifier_call_chain(&netdev_chain,
-				NETDEV_CHANGE, dev);
+		call_netdevice_notifiers(NETDEV_CHANGE, dev);
 		rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
 	}
 }
@@ -1044,7 +1043,7 @@ int dev_open(struct net_device *dev)
 		/*
 		 *	... and announce new interface.
 		 */
-		raw_notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+		call_netdevice_notifiers(NETDEV_UP, dev);
 	}
 	return ret;
 }
@@ -1069,7 +1068,7 @@ int dev_close(struct net_device *dev)
 	 *	Tell people we are going down, so that they can
 	 *	prepare to death, when device is still operating.
 	 */
-	raw_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+	call_netdevice_notifiers(NETDEV_GOING_DOWN, dev);
 
 	dev_deactivate(dev);
 
@@ -1102,7 +1101,7 @@ int dev_close(struct net_device *dev)
 	/*
 	 * Tell people we are down
 	 */
-	raw_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+	call_netdevice_notifiers(NETDEV_DOWN, dev);
 
 	return 0;
 }
@@ -3031,8 +3030,7 @@ int dev_change_flags(struct net_device *dev, unsigned flags)
 	if (dev->flags & IFF_UP &&
 	    ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
 					  IFF_VOLATILE)))
-		raw_notifier_call_chain(&netdev_chain,
-				NETDEV_CHANGE, dev);
+		call_netdevice_notifiers(NETDEV_CHANGE, dev);
 
 	if ((flags ^ dev->gflags) & IFF_PROMISC) {
 		int inc = (flags & IFF_PROMISC) ? +1 : -1;
@@ -3078,8 +3076,7 @@ int dev_set_mtu(struct net_device *dev, int new_mtu)
 	else
 		dev->mtu = new_mtu;
 	if (!err && dev->flags & IFF_UP)
-		raw_notifier_call_chain(&netdev_chain,
-				NETDEV_CHANGEMTU, dev);
+		call_netdevice_notifiers(NETDEV_CHANGEMTU, dev);
 	return err;
 }
 
@@ -3095,8 +3092,7 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
 		return -ENODEV;
 	err = dev->set_mac_address(dev, sa);
 	if (!err)
-		raw_notifier_call_chain(&netdev_chain,
-				NETDEV_CHANGEADDR, dev);
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
 	return err;
 }
 
@@ -3152,8 +3148,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
 				return -EINVAL;
 			memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
 			       min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
-			raw_notifier_call_chain(&netdev_chain,
-					    NETDEV_CHANGEADDR, dev);
+			call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
 			return 0;
 
 		case SIOCGIFMAP:
@@ -3597,7 +3592,7 @@ int register_netdevice(struct net_device *dev)
 	list_netdevice(dev);
 
 	/* Notify protocols, that a new device appeared. */
-	ret = raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+	ret = call_netdevice_notifiers(NETDEV_REGISTER, dev);
 	ret = notifier_to_errno(ret);
 	if (ret)
 		unregister_netdevice(dev);
@@ -3668,8 +3663,7 @@ static void netdev_wait_allrefs(struct net_device *dev)
 			rtnl_lock();
 
 			/* Rebroadcast unregister notification */
-			raw_notifier_call_chain(&netdev_chain,
-					    NETDEV_UNREGISTER, dev);
+			call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 
 			if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
 				     &dev->state)) {
@@ -3914,7 +3908,7 @@ void unregister_netdevice(struct net_device *dev)
 	/* Notify protocols, that we are about to destroy
 	   this device. They should clean all the things.
 	*/
-	raw_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+	call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 
 	/*
 	 *	Flush the unicast and multicast chains