[PATCH v2 5/8] arm64: Select GENERIC_CPU_CACHE_INVALIDATE_MEMREGION

[kernel test robot]

Hi Jonathan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on driver-core/driver-core-testing]
[also build test WARNING on driver-core/driver-core-next driver-core/driver-core-linus arm64/for-next/core linus/master nvdimm/libnvdimm-for-next v6.16-rc3]
[cannot apply to nvdimm/dax-misc next-20250627]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Jonathan-Cameron/memregion-Support-fine-grained-invalidate-by-cpu_cache_invalidate_memregion/20250624-235402
base:   driver-core/driver-core-testing
patch link:    https://lore.kernel.org/r/20250624154805.66985-6-Jonathan.Cameron%40huawei.com
patch subject: [PATCH v2 5/8] arm64: Select GENERIC_CPU_CACHE_INVALIDATE_MEMREGION
config: arm64-randconfig-r111-20250628 (https://download.01.org/0day-ci/archive/20250628/202506281452.zc1D1sSz-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project e04c938cc08a90ae60440ce22d072ebc69d67ee8)
reproduce: (https://download.01.org/0day-ci/archive/20250628/202506281452.zc1D1sSz-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506281452.zc1D1sSz-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/base/cache.c:12:1: sparse: sparse: symbol 'scfm_lock' was not declared. Should it be static?
   drivers/base/cache.c:14:6: sparse: sparse: context imbalance in 'generic_set_sys_cache_flush_method' - wrong count at exit
   drivers/base/cache.c:27:9: sparse: sparse: context imbalance in 'generic_clr_sys_cache_flush_method' - wrong count at exit
   drivers/base/cache.c:31:5: sparse: sparse: context imbalance in 'cpu_cache_invalidate_memregion' - wrong count at exit
   drivers/base/cache.c:41:6: sparse: sparse: context imbalance in 'cpu_cache_has_invalidate_memregion' - wrong count at exit

vim +/scfm_lock +12 drivers/base/cache.c

b51d47491c68aef Yicong Yang 2025-06-24   9  
b51d47491c68aef Yicong Yang 2025-06-24  10  
b51d47491c68aef Yicong Yang 2025-06-24  11  static const struct system_cache_flush_method *scfm_data;
b51d47491c68aef Yicong Yang 2025-06-24 @12  DEFINE_SPINLOCK(scfm_lock);
b51d47491c68aef Yicong Yang 2025-06-24  13  

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