linux-kernel - [PATCH] cpuidle: sysfs: make kobj

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Message-Id: <20230207-kobj_type-cpuidle-v1-1-2ef73398283f@weissschuh.net>
Date:   Tue, 07 Feb 2023 19:55:19 +0000
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] cpuidle: sysfs: make kobj_type structures constant

Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.

Take advantage of this to constify the structure definitions to prevent
modification at runtime.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/cpuidle/sysfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 2b496a53cbca..48948b171749 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -200,7 +200,7 @@ static void cpuidle_sysfs_release(struct kobject *kobj)
 	complete(&kdev->kobj_unregister);
 }
 
-static struct kobj_type ktype_cpuidle = {
+static const struct kobj_type ktype_cpuidle = {
 	.sysfs_ops = &cpuidle_sysfs_ops,
 	.release = cpuidle_sysfs_release,
 };
@@ -447,7 +447,7 @@ static void cpuidle_state_sysfs_release(struct kobject *kobj)
 	complete(&state_obj->kobj_unregister);
 }
 
-static struct kobj_type ktype_state_cpuidle = {
+static const struct kobj_type ktype_state_cpuidle = {
 	.sysfs_ops = &cpuidle_state_sysfs_ops,
 	.default_groups = cpuidle_state_default_groups,
 	.release = cpuidle_state_sysfs_release,
@@ -594,7 +594,7 @@ static struct attribute *cpuidle_driver_default_attrs[] = {
 };
 ATTRIBUTE_GROUPS(cpuidle_driver_default);
 
-static struct kobj_type ktype_driver_cpuidle = {
+static const struct kobj_type ktype_driver_cpuidle = {
 	.sysfs_ops = &cpuidle_driver_sysfs_ops,
 	.default_groups = cpuidle_driver_default_groups,
 	.release = cpuidle_driver_sysfs_release,

---
base-commit: 513c1a3d3f1982fb850c910937099525b0d35e24
change-id: 20230207-kobj_type-cpuidle-8310a467597b

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>