linux-kernel - [PATCH] chardev: make kobj

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Message-Id: <20230216-kobj_type-chardev-v1-1-94e213b73e85@weissschuh.net>
Date:   Thu, 16 Feb 2023 01:14:06 +0000
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Alexander Viro <viro@...iv.linux.org.uk>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] chardev: 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>
---
 fs/char_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/char_dev.c b/fs/char_dev.c
index 13deb45f1ec6..b33331cb97cd 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -624,11 +624,11 @@ static void cdev_dynamic_release(struct kobject *kobj)
 	kobject_put(parent);
 }
 
-static struct kobj_type ktype_cdev_default = {
+static const struct kobj_type ktype_cdev_default = {
 	.release	= cdev_default_release,
 };
 
-static struct kobj_type ktype_cdev_dynamic = {
+static const struct kobj_type ktype_cdev_dynamic = {
 	.release	= cdev_dynamic_release,
 };
 

---
base-commit: 033c40a89f55525139fd5b6342281b09b97d05bf
change-id: 20230216-kobj_type-chardev-f0d84e96be2e

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