Re: [PATCH 06/10] batman-adv: mcast: collect softif listeners from IP lists instead

From: Simon Wunderlich <sw@simonwunderlich.de>
Date: Thu, 27 Jun 2019 12:39:34 +0200

+	in_dev = in_dev_get(dev);
+	if (!in_dev)
+		return 0;

Move this below the rcu_read_lock() and use __in_dev_get_rcu()
instead.

And then...

+
+	rcu_read_lock();

 ...

+	rcu_read_unlock();
+	in_dev_put(in_dev);

You can drop this in_dev_put() as well.

+	in6_dev = in6_dev_get(dev);
+	if (!in6_dev)
+		return 0;
+
+	read_lock_bh(&in6_dev->lock);

Similarly here you can use __in6_dev_get().