void (*mark_device_method) (struct device *, void (*)(Lisp_Object));
void (*asynch_device_change_method) (void);
Lisp_Object (*device_system_metrics_method) (struct device *, enum device_metrics);
void (*mark_device_method) (struct device *, void (*)(Lisp_Object));
void (*asynch_device_change_method) (void);
Lisp_Object (*device_system_metrics_method) (struct device *, enum device_metrics);