[PATCH] Driver Core: add device_find() function

Greg KH wrote:
>
> How about just adding a device_find() function to the driver core, where
> you pass in a name and a type, so that others can use it?

Something like this?

drivers/base/core.c

@@ -400,6 +400,14 @@ int device_for_each_child(struct device * dev, void * data,
 	return error;
 }
 
+struct device *device_find(const char *name, struct bus_type *bus)
+{
+	struct kobject *k = kset_find_obj(&bus->devices, name);
+	if (k)
+		return to_dev(k);
+	return NULL;
+}
+
 int __init devices_init(void)
 {
 	return subsystem_register(&devices_subsys);
@@ -416,6 +424,7 @@ EXPORT_SYMBOL(device_unregister);
 EXPORT_SYMBOL(device_unregister_wait);
 EXPORT_SYMBOL(get_device);
 EXPORT_SYMBOL(put_device);
+EXPORT_SYMBOL(device_find);
 
 EXPORT_SYMBOL(device_create_file);
 EXPORT_SYMBOL(device_remove_file);

include/linux/device.h

@@ -354,6 +354,7 @@ extern int (*platform_notify_remove)(struct device * dev);
  */
 extern struct device * get_device(struct device * dev);
 extern void put_device(struct device * dev);
+extern struct device *device_find(const char *name, struct bus_type *bus);
 
 
 /* drivers/base/platform.c */