linux-kernel - [PATCH] mm/damon/sysfs: make more kobj

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Message-Id: <20230324-b4-kobj_type-damon2-v1-1-48ddbf1c8fcf@weissschuh.net>
Date:   Fri, 24 Mar 2023 15:35:27 +0000
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     SeongJae Park <sj@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] mm/damon/sysfs: make more 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 definition to prevent
modification at runtime.

These structures were not constified in
commit e56397e8c40d ("mm/damon/sysfs: make kobj_type structures constant")
as they didn't exist when that patch was written.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 mm/damon/sysfs-schemes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c
index 3cdad5a7f936..50cf89dcd898 100644
--- a/mm/damon/sysfs-schemes.c
+++ b/mm/damon/sysfs-schemes.c
@@ -384,7 +384,7 @@ static struct attribute *damon_sysfs_scheme_filter_attrs[] = {
 };
 ATTRIBUTE_GROUPS(damon_sysfs_scheme_filter);
 
-static struct kobj_type damon_sysfs_scheme_filter_ktype = {
+static const struct kobj_type damon_sysfs_scheme_filter_ktype = {
 	.release = damon_sysfs_scheme_filter_release,
 	.sysfs_ops = &kobj_sysfs_ops,
 	.default_groups = damon_sysfs_scheme_filter_groups,
@@ -503,7 +503,7 @@ static struct attribute *damon_sysfs_scheme_filters_attrs[] = {
 };
 ATTRIBUTE_GROUPS(damon_sysfs_scheme_filters);
 
-static struct kobj_type damon_sysfs_scheme_filters_ktype = {
+static const struct kobj_type damon_sysfs_scheme_filters_ktype = {
 	.release = damon_sysfs_scheme_filters_release,
 	.sysfs_ops = &kobj_sysfs_ops,
 	.default_groups = damon_sysfs_scheme_filters_groups,

---
base-commit: 1e760fa3596e8c7f08412712c168288b79670d78
change-id: 20230324-b4-kobj_type-damon2-0238ee9e8d8c

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