extern void sysfs_close_device(struct sysfs_device *dev);
extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
extern struct sysfs_attribute *sysfs_get_device_attr
(struct sysfs_device *dev, const unsigned char *name);
extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
extern struct sysfs_device *sysfs_open_device_by_id
extern void sysfs_close_device(struct sysfs_device *dev);
extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
extern struct sysfs_attribute *sysfs_get_device_attr
(struct sysfs_device *dev, const unsigned char *name);
extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
extern struct sysfs_device *sysfs_open_device_by_id