linux-kernel - [PATCH] md: make kobj_type structures constant

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Message-Id: <20230214-kobj_type-md-v1-1-d6853f707f11@weissschuh.net>
Date:   Tue, 14 Feb 2023 03:19:22 +0000
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Song Liu <song@...nel.org>
Cc:     linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] md: 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/md/md.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 02b0240e7c71..091c1d6f0b87 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -78,7 +78,7 @@
 static LIST_HEAD(pers_list);
 static DEFINE_SPINLOCK(pers_lock);
 
-static struct kobj_type md_ktype;
+static const struct kobj_type md_ktype;
 
 struct md_cluster_operations *md_cluster_ops;
 EXPORT_SYMBOL(md_cluster_ops);
@@ -3600,7 +3600,7 @@ static const struct sysfs_ops rdev_sysfs_ops = {
 	.show		= rdev_attr_show,
 	.store		= rdev_attr_store,
 };
-static struct kobj_type rdev_ktype = {
+static const struct kobj_type rdev_ktype = {
 	.release	= rdev_free,
 	.sysfs_ops	= &rdev_sysfs_ops,
 	.default_groups	= rdev_default_groups,
@@ -5558,7 +5558,7 @@ static const struct sysfs_ops md_sysfs_ops = {
 	.show	= md_attr_show,
 	.store	= md_attr_store,
 };
-static struct kobj_type md_ktype = {
+static const struct kobj_type md_ktype = {
 	.release	= md_kobj_release,
 	.sysfs_ops	= &md_sysfs_ops,
 	.default_groups	= md_attr_groups,

---
base-commit: f6feea56f66d34259c4222fa02e8171c4f2673d1
change-id: 20230214-kobj_type-md-a3c7773574cf

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