These pernet_operations have a deal with sysctl, /proc
entries and statistics. Also, there are freeing of
net::sctp::addr_waitq queue and net::sctp::local_addr_list
in exit method. All of them look pernet-divided, and it
seems these items are only interesting for sctp_defaults_ops,
which are safe to be executed in parallel.

Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
 net/sctp/protocol.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 91813e686c67..32be52304f98 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -1330,6 +1330,7 @@ static void __net_exit sctp_defaults_exit(struct net *net)
 static struct pernet_operations sctp_defaults_ops = {
        .init = sctp_defaults_init,
        .exit = sctp_defaults_exit,
+       .async = true,
 };
 
 static int __net_init sctp_ctrlsock_init(struct net *net)

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