--- zzzz-none-000/linux-4.9.279/include/acpi/acpixf.h	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/include/acpi/acpixf.h	2023-02-08 11:43:43.000000000 +0000
@@ -599,6 +599,7 @@
 /*
  * Handler interfaces
  */
+u32 acpi_get_serial_access_length(u32 accessor_type, u32 access_length);
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 			    acpi_install_initialization_handler
 			    (acpi_init_handler handler, u32 function))