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

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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: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20250105-class_fix-v6-8-3a2f1768d4d4@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zijun Hu 2025-01-05 16:34:09 +08:00 • committed by Greg Kroah-Hartman
parent 767b74e0d1
commit 51796f5e29
2 changed files with 29 additions and 35 deletions
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32
drivers/base/core.c
View file

@ -4100,38 +4100,6 @@ struct device *device_find_child(struct device *parent, const void *data,
} }
EXPORT_SYMBOL_GPL(device_find_child); 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) int __init devices_init(void)
{ {
devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL); devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);

32
include/linux/device.h
View file

@ -1083,9 +1083,35 @@ int device_for_each_child_reverse_from(struct device *parent,
device_iter_t fn); device_iter_t fn);
struct device *device_find_child(struct device *parent, const void *data, struct device *device_find_child(struct device *parent, const void *data,
device_match_t match); device_match_t match);
struct device *device_find_child_by_name(struct device *parent, /**
const char *name); * device_find_child_by_name - device iterator for locating a child device.
struct device *device_find_any_child(struct device *parent); * @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_rename(struct device *dev, const char *new_name);
int device_move(struct device *dev, struct device *new_parent, int device_move(struct device *dev, struct device *new_parent,