[PATCH net-next v1 3/4] net: Convert nfs4_dns_resolver_ops

These pernet_operations look similar to rpcsec_gss_net_ops,
they just create and destroy another cache. Also they create
and destroy directory. So, they also look safe to be async.

Signed-off-by: Kirill Tkhai <redacted>
Acked-by: Anna Schumaker <redacted>
---
 fs/nfs/dns_resolve.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index 060c658eab66..e90bd69ab653 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c

@@ -410,6 +410,7 @@ static void nfs4_dns_net_exit(struct net *net)
 static struct pernet_operations nfs4_dns_resolver_ops = {
 	.init = nfs4_dns_net_init,
 	.exit = nfs4_dns_net_exit,
+	.async = true,
 };
 
 static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,