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Since commit 42e52bf9e3 ("net: add netnotifier event for upper device
change"), netdev_master_upper_dev_link has generated NETDEV_CHANGEUPPER
event which would send a notification to userspace in rtnetlink_event.
There's no need to call rtmsg_ifinfo to send the notification any more.
So this patch is to remove it from bond_master_upper_dev_link as well
as bond_upper_dev_unlink to avoid the redundant notifications.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>