unregister_acpi_bus_type
EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
unregister_acpi_bus_type(&drm_connector_acpi_bus);
unregister_acpi_bus_type(&tb_acpi_bus);
unregister_acpi_bus_type(&usb_acpi_bus);
int unregister_acpi_bus_type(struct acpi_bus_type *);