netdev - [PATCH 02/16] net: Convert cfg80211_pernet

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Message-ID: <151903009469.32574.5696083200042858174.stgit@localhost.localdomain>
Date:   Mon, 19 Feb 2018 11:48:14 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     davem@...emloft.net, avagin@...tuozzo.com, pablo@...filter.org,
        kadlec@...ckhole.kfki.hu, fw@...len.de, yoshfuji@...ux-ipv6.org,
        afaerber@...e.de, steffen.klassert@...unet.com,
        herbert@...dor.apana.org.au, johannes@...solutions.net,
        netdev@...r.kernel.org, ktkhai@...tuozzo.com
Subject: [PATCH 02/16] net: Convert cfg80211_pernet_ops

This patch finishes converting pernet_operations
registered in net/wireless directory.

These pernet_operations have only exit method,
which moves devices to init_net. This action
is not pernet_operations-specific, and function
cfg80211_switch_netns() may be called all time
during the system life. All necessary protection
against concurrent cfg80211_pernet_exit() is made
by rtnl_lock(). So, cfg80211_pernet_ops is able
to be marked as async.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 net/wireless/core.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/wireless/core.c b/net/wireless/core.c
index a6f3cac8c640..670aa229168a 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1340,6 +1340,7 @@ static void __net_exit cfg80211_pernet_exit(struct net *net)
 
 static struct pernet_operations cfg80211_pernet_ops = {
 	.exit = cfg80211_pernet_exit,
+	.async = true,
 };
 
 static int __init cfg80211_init(void)