linux-kernel - [PATCH 3/3] mm: kmemleak: mark variables as __read

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Message-ID: <4016090e857e8c4c2ade4b20df312f7f38325c15.1746046744.git.luizcap@redhat.com>
Date: Wed, 30 Apr 2025 16:59:47 -0400
From: Luiz Capitulino <luizcap@...hat.com>
To: catalin.marinas@....com
Cc: lcapitulino@...il.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	david@...hat.com
Subject: [PATCH 3/3] mm: kmemleak: mark variables as __read_mostly

The variables kmemleak_enabled and kmemleak_free_enabled are read in the
kmemleak alloc and free path respectively, but are only written to if/when
kmemleak is disabled.

Signed-off-by: Luiz Capitulino <luizcap@...hat.com>
---
 mm/kmemleak.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 06baa3475252..da9cee34ee1b 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -210,9 +210,9 @@ static struct kmem_cache *object_cache;
 static struct kmem_cache *scan_area_cache;
 
 /* set if tracing memory operations is enabled */
-static int kmemleak_enabled = 1;
+static int kmemleak_enabled __read_mostly = 1;
 /* same as above but only for the kmemleak_free() callback */
-static int kmemleak_free_enabled = 1;
+static int kmemleak_free_enabled __read_mostly = 1;
 /* set in the late_initcall if there were no errors */
 static int kmemleak_late_initialized;
 /* set if a fatal kmemleak error has occurred */
-- 
2.49.0