mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()

The k[v]free_rcu() macro's single-argument form is deprecated.
Therefore switch to the new k[v]free_rcu_mightsleep() variant. The goal
is to avoid accidental use of the single-argument forms, which can
introduce functionality bugs in atomic contexts and latency bugs in
non-atomic contexts.

The callers are holding a mutex so the context allows blocking. Hence
using the API with a single argument will be fine, but use its new name.

There is no functionality change with this patch.

Fixes: 57588c71177f ("mac802154: Handle passive scanning")
Acked-by: Stefan Schmidt <[e-mail]>
Reviewed-by: Paul E. McKenney <[e-mail]>
Signed-off-by: Joel Fernandes (Google) <[e-mail]>

net/mac802154/scan.c

···
 	request = rcu_replace_pointer(local->scan_req, NULL, 1);
 	if (!request)
 		return 0;
-	kfree_rcu(request);
+	kvfree_rcu_mightsleep(request);
 
 	/* Advertize first, while we know the devices cannot be removed */
 	if (aborted)
···
 	request = rcu_replace_pointer(local->beacon_req, NULL, 1);
 	if (!request)
 		return 0;
-	kfree_rcu(request);
+	kvfree_rcu_mightsleep(request);
 
 	nl802154_beaconing_done(wpan_dev);