driver core: Introduce device_find_child().

	return error;

}

/**

 * device_find_child - device iterator for locating a particular device.

 * @parent: parent struct device

 * @data: Data to pass to match function

 * @match: Callback function to check device

 *

 * This is similar to the device_for_each_child() function above, but it

 * returns a reference to a device that is 'found' for later use, as

 * determined by the @match callback.

 *

 * The callback should return 0 if the device doesn't match and non-zero

 * if it does.  If the callback returns non-zero and a reference to the

 * current device can be obtained, this function will return to the caller

 * and not iterate over any more devices.

 */

struct device * device_find_child(struct device *parent, void *data,

				  int (*match)(struct device *, void *))

{

	struct klist_iter i;

	struct device *child;

	if (!parent)

		return NULL;

	klist_iter_init(&parent->klist_children, &i);

	while ((child = next_device(&i)))

		if (match(child, data) && get_device(child))

			break;

	klist_iter_exit(&i);

	return child;

}

int __init devices_init(void)

{

	return subsystem_register(&devices_subsys);

}

EXPORT_SYMBOL_GPL(device_for_each_child);

EXPORT_SYMBOL_GPL(device_find_child);

EXPORT_SYMBOL_GPL(device_initialize);

EXPORT_SYMBOL_GPL(device_add);

extern void device_del(struct device * dev);

extern int device_for_each_child(struct device *, void *,

		     int (*fn)(struct device *, void *));

extern struct device *device_find_child(struct device *, void *data,

					int (*match)(struct device *, void *));

extern int device_rename(struct device *dev, char *new_name);

/*