net: add a list_head parameter to dellink() method

Adding a list_head parameter to rtnl_link_ops->dellink() methods
allow us to queue devices on a list, in order to dismantle
them all at once.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/rtnetlink.h b/include/net/rtnetlink.h
index c3aa044d..cd5af1f 100644
--- a/include/net/rtnetlink.h
+++ b/include/net/rtnetlink.h
@@ -61,7 +61,8 @@
 	int			(*changelink)(struct net_device *dev,
 					      struct nlattr *tb[],
 					      struct nlattr *data[]);
-	void			(*dellink)(struct net_device *dev);
+	void			(*dellink)(struct net_device *dev,
+					   struct list_head *head);
 
 	size_t			(*get_size)(const struct net_device *dev);
 	int			(*fill_info)(struct sk_buff *skb,