tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   771a207d1ee9f38da8c0cee1412228f18b900bac
commit: e81c782c16844dc758a784899c2fe5260386211b [6920/9540] ACPI: Implement a generic FFH Opregion handler
config: i386-randconfig-s051-20221121
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e81c782c16844dc758a784899c2fe5260386211b
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout e81c782c16844dc758a784899c2fe5260386211b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/acpi/

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

sparse warnings: (new ones prefixed by >>)
>> drivers/acpi/bus.c:303:6: sparse: sparse: symbol 'osc_sb_ffh_opregion_support_confirmed' was not declared. Should it be static?

vim +/osc_sb_ffh_opregion_support_confirmed +303 drivers/acpi/bus.c

   302	
 > 303	bool osc_sb_ffh_opregion_support_confirmed;
   304	

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