+extern int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev);
+extern int udev_remove_device(struct udevice *udev);
+extern void udev_init_config(void);
+extern int udev_start(void);
+extern void udev_multiplex_directory(struct udevice *udev, const char *basedir, const char *suffix);
+extern int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid);