driver core: bus: constify class_unregister/destroy()

The class_unregister() and class_destroy() function should be taking a
const * to struct class, not just a *, so fix that up.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230325084526.3622123-1-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/class.c

@@ -142,13 +142,13 @@ static void klist_class_dev_put(struct klist_node *n)
 	put_device(dev);
 }
 
-static int class_add_groups(struct class *cls,
+static int class_add_groups(const struct class *cls,
 			    const struct attribute_group **groups)
 {
 	return sysfs_create_groups(&cls->p->subsys.kobj, groups);
 }
 
-static void class_remove_groups(struct class *cls,
+static void class_remove_groups(const struct class *cls,
 				const struct attribute_group **groups)
 {
 	return sysfs_remove_groups(&cls->p->subsys.kobj, groups);
@@ -206,7 +206,7 @@ int class_register(struct class *cls)
 }
 EXPORT_SYMBOL_GPL(class_register);
 
-void class_unregister(struct class *cls)
+void class_unregister(const struct class *cls)
 {
 	pr_debug("device class '%s': unregistering\n", cls->name);
 	class_remove_groups(cls, cls->class_groups);
@@ -265,7 +265,7 @@ EXPORT_SYMBOL_GPL(class_create);
  * Note, the pointer to be destroyed must have been created with a call
  * to class_create().
  */
-void class_destroy(struct class *cls)
+void class_destroy(const struct class *cls)
 {
 	if (IS_ERR_OR_NULL(cls))
 		return;

include/linux/device/class.h

@@ -83,7 +83,7 @@ struct class_dev_iter {
 extern struct kobject *sysfs_dev_block_kobj;
 
 int __must_check class_register(struct class *class);
-void class_unregister(struct class *class);
+void class_unregister(const struct class *class);
 
 struct class_compat;
 struct class_compat *class_compat_register(const char *name);
@@ -231,6 +231,6 @@ int __must_check class_interface_register(struct class_interface *);
 void class_interface_unregister(struct class_interface *);
 
 struct class * __must_check class_create(const char *name);
-void class_destroy(struct class *cls);
+void class_destroy(const struct class *cls);
 
 #endif	/* _DEVICE_CLASS_H_ */