netdev - [PATCH net-next 2/2] net: Convert hwsim_net

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Message-ID: <151990381777.5011.9167607678928255271.stgit@localhost.localdomain>
Date:   Thu, 01 Mar 2018 14:30:17 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     davem@...emloft.net, johannes@...solutions.net,
        kvalo@...eaurora.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, ktkhai@...tuozzo.com
Subject: [PATCH net-next 2/2] net: Convert hwsim_net_ops

These pernet_operations allocate and destroy IDA identifier,
and these actions are synchronized by IDA subsystem locks.
Exit method removes mac80211_hwsim_data enteries from the lists,
and this is synchronized by hwsim_radio_lock with the rest
parallel pernet_operations. Also it queues destroy_radio()
work, and these work already may be executed in parallel
with any pernet_operations (as it's a work :). So, we may
mark these pernet_operations as async.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
---
 drivers/net/wireless/mac80211_hwsim.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 45ba846bc285..7b6c3640a94f 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -3541,6 +3541,7 @@ static struct pernet_operations hwsim_net_ops = {
 	.exit = hwsim_exit_net,
 	.id   = &hwsim_net_id,
 	.size = sizeof(struct hwsim_net),
+	.async = true,
 };

 static void hwsim_exit_netlink(void)