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Commit 2831fe6f authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

driver core: create a private portion of struct device 



This is to be used to move things out of struct device that no code
outside of the driver core should ever touch.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 2e5ba26a

drivers/base/base.h

+12 −0
Original line number Diff line number Diff line
@@ -63,6 +63,18 @@ struct class_private { 
#define to_class(obj)	\

	container_of(obj, struct class_private, class_subsys.kobj)



/**

 * struct device_private - structure to hold the private to the driver core portions of the device structure.

 *

 * @device - pointer back to the struct class that this structure is

 * associated with.

 *

 * Nothing outside of the driver core should ever touch these fields.

 */

struct device_private {

	struct device *device;

};



/* initialisation functions */

extern int devices_init(void);

extern int buses_init(void);

drivers/base/core.c

+8 −0
Original line number Diff line number Diff line
@@ -109,6 +109,7 @@ static struct sysfs_ops dev_sysfs_ops = { 
static void device_release(struct kobject *kobj)

{

	struct device *dev = to_dev(kobj);

	struct device_private *p = dev->p;



	if (dev->release)

		dev->release(dev);
@@ -120,6 +121,7 @@ static void device_release(struct kobject *kobj) 
		WARN(1, KERN_ERR "Device '%s' does not have a release() "

			"function, it is broken and must be fixed.\n",

			dev_name(dev));

	kfree(p);

}



static struct kobj_type device_ktype = {
@@ -536,6 +538,12 @@ static void klist_children_put(struct klist_node *n) 
 */

void device_initialize(struct device *dev)

{

	dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);

	if (!dev->p) {

		WARN_ON(1);

		return;

	}

	dev->p->device = dev;

	dev->kobj.kset = devices_kset;

	kobject_init(&dev->kobj, &device_ktype);

	klist_init(&dev->klist_children, klist_children_get,

include/linux/device.h

+3 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#define BUS_ID_SIZE		20



struct device;

struct device_private;

struct device_driver;

struct driver_private;

struct class;
@@ -371,6 +372,8 @@ struct device { 
	struct klist_node	knode_bus;

	struct device		*parent;



	struct device_private	*p;



	struct kobject kobj;

	char	bus_id[BUS_ID_SIZE];	/* position on parent bus */

	unsigned		uevent_suppress:1;