kobject_set_name_vargs
int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list);
kobject_set_name_vargs(&dev->kobj, fmt, args);
retval = kobject_set_name_vargs(&dev->kobj, fmt, args);
error = kobject_set_name_vargs(kobj, fmt, args);
error = kobject_set_name_vargs(kobj, fmt, args);
error = kobject_set_name_vargs(kobj, fmt, args);