Build failure against Linux 6.12 due to removal of wmi_get_event_data

[vikanezrimaya]

wmi_get_event_data is part of the GUID-based WMI interface (deprecated in torvalds/linux@d54bd4b). This function was removed in torvalds/linux@79a56f4, allegedly because its improper usage had potential to mess up ACPI firmware on some machines.

Additionally, the signature of wmi_install_notify_handler's callback changed from void (*)(u32, void *) to void (*)(union acpi_object *, void *) in torvalds/linux@e04e2b7, to replace the removed functionality. The in-tree copy of huawei-wmi was also patched accordingly, and this patch can be carried forward into this version.

Build failure log

  CC [M]  /build/source/huawei-wmi.o
/build/source/huawei-wmi.c: In function 'huawei_wmi_input_notify':
/build/source/huawei-wmi.c:1480:18: error: implicit declaration of function 'wmi_get_event_data'; did you mean 'acpi_get_event_status'? [-Werror=implicit-function-declaration]
 1480 |         status = wmi_get_event_data(value, &response);
      |                  ^~~~~~~~~~~~~~~~~~
      |                  acpi_get_event_status
/build/source/huawei-wmi.c: In function 'huawei_wmi_input_setup':
/build/source/huawei-wmi.c:1510:50: error: passing argument 2 of 'wmi_install_notify_handler' from incompatible pointer type [-Werror=incompatible-pointer-types]
 1510 |                 wmi_install_notify_handler(guid, huawei_wmi_input_notify,
      |                                                  ^~~~~~~~~~~~~~~~~~~~~~~
      |                                                  |
      |                                                  void (*)(u32,  void *) {aka void (*)(unsigned int,  void *)}
In file included from /build/source/huawei-wmi.c:8:
/nix/store/hs64hbfp8c68syszdy8i3zjlmi9r3a76-linux-6.12-dev/lib/modules/6.12.0/source/include/linux/acpi.h:404:60: note: expected 'wmi_notify_handler' {aka 'void (*)(union acpi_object *, void *)'} but argument is of type 'void (*)(u32,  void *)' {aka 'void (*)(unsigned int,  void *)'}
  404 |                                         wmi_notify_handler handler, void *data);
      |                                         ~~~~~~~~~~~~~~~~~~~^~~~~~~
cc1: some warnings being treated as errors