void *context, void **return_value);
acpi_status
-acpi_get_devices(char *HID,
+acpi_get_devices(const char *HID,
acpi_walk_callback user_function,
void *context, void **return_value);
*/
acpi_status acpi_get_register(u32 register_id, u32 * return_value);
+acpi_status acpi_get_register_unlocked(u32 register_id, u32 *return_value);
+
acpi_status acpi_set_register(u32 register_id, u32 value);
acpi_status