driver core: class: make class_create/remove_file*() options const

The class_create_file*() and class_remove_file*() functions do not
modify the struct class at all, so mark them as const * to enforce that.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230313181843.1207845-8-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/class.c

@@ -87,7 +87,7 @@ static const struct kobj_type class_ktype = {
 static struct kset *class_kset;
 
 
-int class_create_file_ns(struct class *cls, const struct class_attribute *attr,
+int class_create_file_ns(const struct class *cls, const struct class_attribute *attr,
 			 const void *ns)
 {
 	int error;
@@ -101,7 +101,7 @@ int class_create_file_ns(struct class *cls, const struct class_attribute *attr,
 }
 EXPORT_SYMBOL_GPL(class_create_file_ns);
 
-void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,
+void class_remove_file_ns(const struct class *cls, const struct class_attribute *attr,
 			  const void *ns)
 {
 	if (cls)

include/linux/device/class.h

@@ -200,20 +200,20 @@ struct class_attribute {
 #define CLASS_ATTR_WO(_name) \
 	struct class_attribute class_attr_##_name = __ATTR_WO(_name)
 
-extern int __must_check class_create_file_ns(struct class *class,
+extern int __must_check class_create_file_ns(const struct class *class,
 					     const struct class_attribute *attr,
 					     const void *ns);
-extern void class_remove_file_ns(struct class *class,
+extern void class_remove_file_ns(const struct class *class,
 				 const struct class_attribute *attr,
 				 const void *ns);
 
-static inline int __must_check class_create_file(struct class *class,
+static inline int __must_check class_create_file(const struct class *class,
 						 const struct class_attribute *attr)
 {
 	return class_create_file_ns(class, attr, NULL);
 }
 
-static inline void class_remove_file(struct class *class,
+static inline void class_remove_file(const struct class *class,
 				     const struct class_attribute *attr)
 {
 	return class_remove_file_ns(class, attr, NULL);