drivers/acpi/prmt.c:53:1: sparse: sparse: symbol 'prm_module_list' was not declared. Should it be static?

drivers/acpi/prmt.c:53:1: sparse: sparse: symbol 'prm_module_list' was not declared. Should it be static?

[kernel test robot]

tree:   https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git linux-5.4/lts/5.4.119-20.0009.spr
head:   e116ff64db9be38b70fd5b050f5900435d428547
commit: ad03ca994ff0746ea484384b7ed5e1391a715a62 ACPI: PRM: implement OperationRegion handler for the PlatformRtMechanism subtype
date:   9 months ago
config: x86_64-randconfig-r132-20240305 (https://download.01.org/0day-ci/archive/20240305/202403052238.PNESjOFx-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240305/202403052238.PNESjOFx-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403052238.PNESjOFx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/acpi/prmt.c:53:1: sparse: sparse: symbol 'prm_module_list' was not declared. Should it be static?

vim +/prm_module_list +53 drivers/acpi/prmt.c

    51	
    52	
  > 53	LIST_HEAD(prm_module_list);
    54	

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