for_each_netdev() should be used with RTNL or dev_base_lock held,
or else we risk a crash.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>