net: Introduce unregister_netdevice_many()

Introduce rollback_registered_many() and unregister_netdevice_many()

rollback_registered_many() is able to perform necessary steps at device dismantle
time, factorizing two expensive synchronize_net() calls.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0ded0a4768a0..e7c227d7cb98 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1119,6 +1119,7 @@ extern int		dev_queue_xmit(struct sk_buff *skb);
 extern int              register_netdevice(struct net_device *dev);
 extern void             unregister_netdevice_queue(struct net_device *dev,
                                                    struct list_head *head);
+extern void             unregister_netdevice_many(struct list_head *head);
 static inline void unregister_netdevice(struct net_device *dev)
 {
         unregister_netdevice_queue(dev, NULL);