mm/slab: constify sysfs attributes

These attributes are never modified, make them read-only.

Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Harry Yoo <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Vlastimil Babka (SUSE) <[email protected]>

Author: t-8ch

mm/slub.c

@@ -8833,7 +8833,7 @@ static ssize_t show_slab_objects(struct kmem_cache *s,
 	return len;
 }
 
-#define to_slab_attr(n) container_of(n, struct slab_attribute, attr)
+#define to_slab_attr(n) container_of_const(n, struct slab_attribute, attr)
 #define to_slab(n) container_of(n, struct kmem_cache, kobj)
 
 struct slab_attribute {
@@ -8843,10 +8843,10 @@ struct slab_attribute {
 };
 
 #define SLAB_ATTR_RO(_name) \
-	static struct slab_attribute _name##_attr = __ATTR_RO_MODE(_name, 0400)
+	static const struct slab_attribute _name##_attr = __ATTR_RO_MODE(_name, 0400)
 
 #define SLAB_ATTR(_name) \
-	static struct slab_attribute _name##_attr = __ATTR_RW_MODE(_name, 0600)
+	static const struct slab_attribute _name##_attr = __ATTR_RW_MODE(_name, 0600)
 
 static ssize_t slab_size_show(struct kmem_cache *s, char *buf)
 {
@@ -9240,7 +9240,7 @@ static ssize_t skip_kfence_store(struct kmem_cache *s,
 SLAB_ATTR(skip_kfence);
 #endif
 
-static struct attribute *slab_attrs[] = {
+static const struct attribute *const slab_attrs[] = {
 	&slab_size_attr.attr,
 	&object_size_attr.attr,
 	&objs_per_slab_attr.attr,
@@ -9323,7 +9323,7 @@ static ssize_t slab_attr_show(struct kobject *kobj,
 				struct attribute *attr,
 				char *buf)
 {
-	struct slab_attribute *attribute;
+	const struct slab_attribute *attribute;
 	struct kmem_cache *s;
 
 	attribute = to_slab_attr(attr);
@@ -9339,7 +9339,7 @@ static ssize_t slab_attr_store(struct kobject *kobj,
 				struct attribute *attr,
 				const char *buf, size_t len)
 {
-	struct slab_attribute *attribute;
+	const struct slab_attribute *attribute;
 	struct kmem_cache *s;
 
 	attribute = to_slab_attr(attr);