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@xxxxxxxxx/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@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202506281452.zc1D1sSz-lkp@xxxxxxxxx/ 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 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
