These pernet_operations create and destroy net::nfnl
socket of NETLINK_NETFILTER code. There are no other
places, where such type the socket is created, except
these pernet_operations. It seem other pernet_operations
depending on CONFIG_NETFILTER_NETLINK send messages
to this socket. So, we mark it async.

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

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 03ead8a9e90c..84fc4954862d 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -566,6 +566,7 @@ static void __net_exit nfnetlink_net_exit_batch(struct 
list_head *net_exit_list)
 static struct pernet_operations nfnetlink_net_ops = {
        .init           = nfnetlink_net_init,
        .exit_batch     = nfnetlink_net_exit_batch,
+       .async          = true,
 };
 
 static int __init nfnetlink_init(void)

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