Re: [PATCH v2 1/2] ACPI: utils: Add api to read _SUB from ACPI

[kernel test robot <lkp@intel.com>]

Hi Stefan,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on broonie-sound/for-next linus/master v5.19-rc4 next-20220627]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Stefan-Binding/Read-_SUB-from-ACPI-to-be-able-to-identify-firmware/20220627-221508
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: um-x86_64_defconfig (https://download.01.org/0day-ci/archive/20220627/202206272354.ESTdiIXg-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/93ba13d4b3636b5cf2ff4d9185aa73f059cc7b2a
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Stefan-Binding/Read-_SUB-from-ACPI-to-be-able-to-identify-firmware/20220627-221508
        git checkout 93ba13d4b3636b5cf2ff4d9185aa73f059cc7b2a
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from init/main.c:30:
>> include/linux/acpi.h:1028:1: error: expected identifier or '(' before '{' token
    1028 | {
         | ^
   init/main.c:769:20: warning: no previous prototype for 'arch_post_acpi_subsys_init' [-Wmissing-prototypes]
     769 | void __init __weak arch_post_acpi_subsys_init(void) { }
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
   init/main.c:781:20: warning: no previous prototype for 'mem_encrypt_init' [-Wmissing-prototypes]
     781 | void __init __weak mem_encrypt_init(void) { }
         |                    ^~~~~~~~~~~~~~~~
   init/main.c:783:20: warning: no previous prototype for 'poking_init' [-Wmissing-prototypes]
     783 | void __init __weak poking_init(void) { }
         |                    ^~~~~~~~~~~
   In file included from init/main.c:30:
   include/linux/acpi.h:1027:27: warning: 'acpi_get_subsystem_id' declared 'static' but never defined [-Wunused-function]
    1027 | static inline const char *acpi_get_subsystem_id(acpi_handle handle);
         |                           ^~~~~~~~~~~~~~~~~~~~~
--
   In file included from kernel/sysctl.c:55:
>> include/linux/acpi.h:1028:1: error: expected identifier or '(' before '{' token
    1028 | {
         | ^
   include/linux/acpi.h:1027:27: warning: 'acpi_get_subsystem_id' declared 'static' but never defined [-Wunused-function]
    1027 | static inline const char *acpi_get_subsystem_id(acpi_handle handle);
         |                           ^~~~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/i2c.h:13,
                    from drivers/input/mouse/synaptics.c:30:
>> include/linux/acpi.h:1028:1: error: expected identifier or '(' before '{' token
    1028 | {
         | ^
   include/linux/acpi.h:1027:27: warning: 'acpi_get_subsystem_id' declared 'static' but never defined [-Wunused-function]
    1027 | static inline const char *acpi_get_subsystem_id(acpi_handle handle);
         |                           ^~~~~~~~~~~~~~~~~~~~~
   drivers/input/mouse/synaptics.c:164:27: warning: 'smbus_pnp_ids' defined but not used [-Wunused-const-variable=]
     164 | static const char * const smbus_pnp_ids[] = {
         |                           ^~~~~~~~~~~~~


vim +1028 include/linux/acpi.h

  1026	
  1027	static inline const char *acpi_get_subsystem_id(acpi_handle handle);
> 1028	{
  1029		return ERR_PTR(-ENODEV);
  1030	}
  1031	

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