rtnetlink_net_init() and rtnetlink_net_exit()
create and destroy netlink socket net::rtnl.

The socket is used to send rtnl notification via
rtnl_net_notifyid(). There is no a problem
to create and destroy it in parallel with other
pernet operations, as we link net in setup_net()
after the socket is created, and destroy
in cleanup_net() after net is unhashed from all
the lists and there is no RCU references on it.

Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
Acked-by: Andrei Vagin <ava...@virtuozzo.com>
 net/core/rtnetlink.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 257e7bbaffba..67f375cfb982 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -4724,6 +4724,7 @@ static void __net_exit rtnetlink_net_exit(struct net *net)
 static struct pernet_operations rtnetlink_net_ops = {
        .init = rtnetlink_net_init,
        .exit = rtnetlink_net_exit,
+       .async = true,
 void __init rtnetlink_init(void)

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