linux-ext4 - [PATCH v2 07/14] ext4/super: Rename kfree_rcu() to kfree_rcu

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Date:   Wed, 15 Mar 2023 18:18:54 +0000
From:   "Joel Fernandes (Google)" <joel@...lfernandes.org>
To:     "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>
Cc:     "Uladzislau Rezki (Sony)" <urezki@...il.com>,
        Lukas Czerner <lczerner@...hat.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 07/14] ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()

From: "Uladzislau Rezki (Sony)" <urezki@...il.com>

The kfree_rcu() and kvfree_rcu() macros' single-argument forms are
deprecated.  Therefore switch to the new kfree_rcu_mightsleep() and
kvfree_rcu_mightsleep() variants. 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.

Cc: Theodore Ts'o <tytso@....edu>
Cc: Lukas Czerner <lczerner@...hat.com>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
---
 fs/ext4/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 88f7b8a88c76..405a66b47311 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2500,7 +2500,7 @@ static void ext4_apply_quota_options(struct fs_context *fc,
 			qname = rcu_replace_pointer(sbi->s_qf_names[i], qname,
 						lockdep_is_held(&sb->s_umount));
 			if (qname)
-				kfree_rcu(qname);
+				kfree_rcu_mightsleep(qname);
 		}
 	}
 
-- 
2.40.0.rc1.284.g88254d51c5-goog