Re: [PATCH v2 5/8] arm64: Select GENERIC_CPU_CACHE_INVALIDATE_MEMREGION

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

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-20250625]
[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-allnoconfig (https://download.01.org/0day-ci/archive/20250626/202506260055.YivRG9iE-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250626/202506260055.YivRG9iE-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/202506260055.YivRG9iE-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/base/cache.c:31:5: warning: no previous prototype for 'cpu_cache_invalidate_memregion' [-Wmissing-prototypes]
      31 | int cpu_cache_invalidate_memregion(int res_desc, phys_addr_t start, size_t len)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/base/cache.c:41:6: warning: no previous prototype for 'cpu_cache_has_invalidate_memregion' [-Wmissing-prototypes]
      41 | bool cpu_cache_has_invalidate_memregion(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/cpu_cache_invalidate_memregion +31 drivers/base/cache.c

b51d47491c68ae Yicong Yang 2025-06-24  30  
b51d47491c68ae Yicong Yang 2025-06-24 @31  int cpu_cache_invalidate_memregion(int res_desc, phys_addr_t start, size_t len)
b51d47491c68ae Yicong Yang 2025-06-24  32  {
b51d47491c68ae Yicong Yang 2025-06-24  33  	guard(spinlock_irqsave)(&scfm_lock);
b51d47491c68ae Yicong Yang 2025-06-24  34  	if (!scfm_data)
b51d47491c68ae Yicong Yang 2025-06-24  35  		return -EOPNOTSUPP;
b51d47491c68ae Yicong Yang 2025-06-24  36  
b51d47491c68ae Yicong Yang 2025-06-24  37  	return scfm_data->invalidate_memregion(res_desc, start, len);
b51d47491c68ae Yicong Yang 2025-06-24  38  }
b51d47491c68ae Yicong Yang 2025-06-24  39  EXPORT_SYMBOL_NS_GPL(cpu_cache_invalidate_memregion, "DEVMEM");
b51d47491c68ae Yicong Yang 2025-06-24  40  
b51d47491c68ae Yicong Yang 2025-06-24 @41  bool cpu_cache_has_invalidate_memregion(void)

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