• Kirill Tkhai's avatar
    net: Drop NETDEV_UNREGISTER_FINAL · 070f2d7e
    Kirill Tkhai authored
    Last user is gone after bdf5bd7f "rds: tcp: remove
    register_netdevice_notifier infrastructure.", so we can
    remove this netdevice command. This allows to delete
    rtnl_lock() in netdev_run_todo(), which is hot path for
    net namespace unregistration.
    
    dev_change_net_namespace() and netdev_wait_allrefs()
    have rcu_barrier() before NETDEV_UNREGISTER_FINAL call,
    and the source commits say they were introduced to
    delemit the call with NETDEV_UNREGISTER, but this patch
    leaves them on the places, since they require additional
    analysis, whether we need in them for something else.
    Signed-off-by: default avatarKirill Tkhai <ktkhai@virtuozzo.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    070f2d7e
main.c 25.5 KB