Re: [PATCH] arch_topology: Clear LLC sibling when cacheinfo teardown

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

Hi Song,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus linus/master v6.3-rc2 next-20230310]
[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/Song-Shuai/arch_topology-Clear-LLC-sibling-when-cacheinfo-teardown/20230313-182946
patch link:    https://lore.kernel.org/r/20230313102752.1134472-1-suagrfillet%40gmail.com
patch subject: [PATCH] arch_topology: Clear LLC sibling when cacheinfo teardown
config: arm-randconfig-r046-20230312 (https://download.01.org/0day-ci/archive/20230314/202303141252.uMIMFRnT-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/intel-lab-lkp/linux/commit/a9aca0a81b31b421e3bbfa08fd205a8bec651afe
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Song-Shuai/arch_topology-Clear-LLC-sibling-when-cacheinfo-teardown/20230313-182946
        git checkout a9aca0a81b31b421e3bbfa08fd205a8bec651afe
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/base/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303141252.uMIMFRnT-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/base/cacheinfo.c:818:2: error: call to undeclared function 'clear_llc_topology'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           clear_llc_topology(cpu);
           ^
   1 error generated.


vim +/clear_llc_topology +818 drivers/base/cacheinfo.c

   811	
   812	static int cacheinfo_cpu_pre_down(unsigned int cpu)
   813	{
   814		if (cpumask_test_and_clear_cpu(cpu, &cache_dev_map))
   815			cpu_cache_sysfs_exit(cpu);
   816	
   817		free_cache_attributes(cpu);
 > 818		clear_llc_topology(cpu);
   819		return 0;
   820	}
   821	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests