Commit 43a7206b authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

driver core: class: make class_register() take a const * 



Now that the class code is cleaned up to not modify the class pointer
registered with it, change class_register() to take a const * to allow
the structure to be placed into read-only memory.

Acked-by: default avatarRafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/2023040248-customary-release-4aec@gregkh


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 979207ca

drivers/base/base.h

+1 −1
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ struct subsys_private { 
	struct device *dev_root;



	struct kset glue_dirs;

	struct class *class;

	const struct class *class;



	struct lock_class_key lock_key;

};

drivers/base/class.c

+3 −3
Original line number Diff line number Diff line
@@ -93,7 +93,7 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr, 
static void class_release(struct kobject *kobj)

{

	struct subsys_private *cp = to_subsys_private(kobj);

	struct class *class = cp->class;

	const struct class *class = cp->class;



	pr_debug("class '%s': release.\n", class->name);
@@ -110,7 +110,7 @@ static void class_release(struct kobject *kobj) 
static const struct kobj_ns_type_operations *class_child_ns_type(const struct kobject *kobj)

{

	const struct subsys_private *cp = to_subsys_private(kobj);

	struct class *class = cp->class;

	const struct class *class = cp->class;



	return class->ns_type;

}
@@ -175,7 +175,7 @@ static void klist_class_dev_put(struct klist_node *n) 
	put_device(dev);

}



int class_register(struct class *cls)

int class_register(const struct class *cls)

{

	struct subsys_private *cp;

	struct lock_class_key *key;

include/linux/device/class.h

+1 −1
Original line number Diff line number Diff line
@@ -76,7 +76,7 @@ struct class_dev_iter { 
	const struct device_type	*type;

};



int __must_check class_register(struct class *class);

int __must_check class_register(const struct class *class);

void class_unregister(const struct class *class);

bool class_is_registered(const struct class *class);