These pernet_operations unregister net::ipv4::nat_table table.
Another net/pernet_operations do not send ipv4 packets to foreign
net namespaces. So, we mark them async.

Signed-off-by: Kirill Tkhai <ktk...@virtuozzo.com>
---
 net/ipv4/netfilter/iptable_nat.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c
index 0f7255cc65ee..b771af74be79 100644
--- a/net/ipv4/netfilter/iptable_nat.c
+++ b/net/ipv4/netfilter/iptable_nat.c
@@ -129,6 +129,7 @@ static void __net_exit iptable_nat_net_exit(struct net *net)
 
 static struct pernet_operations iptable_nat_net_ops = {
        .exit   = iptable_nat_net_exit,
+       .async  = true,
 };
 
 static int __init iptable_nat_init(void)

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