Commit 51796f5e authored by Zijun Hu's avatar Zijun Hu Committed by Greg Kroah-Hartman
Browse files

driver core: Move two simple APIs for finding child device to header 



The following two APIs are for finding child device, and both only have
one line code in function body.
device_find_child_by_name()
device_find_any_child()

Move them to header as static inline function.

Reviewed-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarZijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20250105-class_fix-v6-8-3a2f1768d4d4@quicinc.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 767b74e0

drivers/base/core.c

+0 −32
Original line number Diff line number Diff line
@@ -4100,38 +4100,6 @@ struct device *device_find_child(struct device *parent, const void *data, 
}

EXPORT_SYMBOL_GPL(device_find_child);



/**

 * device_find_child_by_name - device iterator for locating a child device.

 * @parent: parent struct device

 * @name: name of the child device

 *

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

 * returns a reference to a device that has the name @name.

 *

 * NOTE: you will need to drop the reference with put_device() after use.

 */

struct device *device_find_child_by_name(struct device *parent,

					 const char *name)

{

	return device_find_child(parent, name, device_match_name);

}

EXPORT_SYMBOL_GPL(device_find_child_by_name);



/**

 * device_find_any_child - device iterator for locating a child device, if any.

 * @parent: parent struct device

 *

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

 * returns a reference to a child device, if any.

 *

 * NOTE: you will need to drop the reference with put_device() after use.

 */

struct device *device_find_any_child(struct device *parent)

{

	return device_find_child(parent, NULL, device_match_any);

}

EXPORT_SYMBOL_GPL(device_find_any_child);



int __init devices_init(void)

{

	devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);

include/linux/device.h

+29 −3
Original line number Diff line number Diff line
@@ -1083,9 +1083,35 @@ int device_for_each_child_reverse_from(struct device *parent, 
				       device_iter_t fn);

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

				 device_match_t match);

struct device *device_find_child_by_name(struct device *parent,

					 const char *name);

struct device *device_find_any_child(struct device *parent);

/**

 * device_find_child_by_name - device iterator for locating a child device.

 * @parent: parent struct device

 * @name: name of the child device

 *

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

 * returns a reference to a device that has the name @name.

 *

 * NOTE: you will need to drop the reference with put_device() after use.

 */

static inline struct device *device_find_child_by_name(struct device *parent,

						       const char *name)

{

	return device_find_child(parent, name, device_match_name);

}



/**

 * device_find_any_child - device iterator for locating a child device, if any.

 * @parent: parent struct device

 *

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

 * returns a reference to a child device, if any.

 *

 * NOTE: you will need to drop the reference with put_device() after use.

 */

static inline struct device *device_find_any_child(struct device *parent)

{

	return device_find_child(parent, NULL, device_match_any);

}



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

int device_move(struct device *dev, struct device *new_parent,