extern struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
unsigned char *attrname);
extern struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,
extern struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
unsigned char *attrname);
extern struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,