linux-kernel - [PATCH v2 12/14] mac802154: Rename kfree_rcu() to kvfree_rcu

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Message-Id: <20230315181902.4177819-12-joel@joelfernandes.org>
Date:   Wed, 15 Mar 2023 18:18:59 +0000
From:   "Joel Fernandes (Google)" <joel@...lfernandes.org>
To:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        David Girault <david.girault@...vo.com>
Cc:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Alexander Aring <aahringo@...hat.com>,
        linux-wpan@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 12/14] 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")
Reviewed-by: Paul E. McKenney <paulmck@...nel.org>
Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
---
 net/mac802154/scan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac802154/scan.c b/net/mac802154/scan.c
index 9b0933a185eb..5c191bedd72c 100644
--- a/net/mac802154/scan.c
+++ b/net/mac802154/scan.c
@@ -52,7 +52,7 @@ static int mac802154_scan_cleanup_locked(struct ieee802154_local *local,
 	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)
@@ -403,7 +403,7 @@ int mac802154_stop_beacons_locked(struct ieee802154_local *local,
 	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);
 
-- 
2.40.0.rc1.284.g88254d51c5-goog