Hi "Gautham,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.10-rc6 next-20201203]
[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]

url:    https://github.com/0day-ci/linux/commits/Gautham-R-Shenoy/Extend-Parsing-ibm-thread-groups-for-Shared-L2-information/20201204-125539
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allnoconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
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
        # https://github.com/0day-ci/linux/commit/50eddc8f426f7197dab6d84dd9078ed53161c2ad
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Gautham-R-Shenoy/Extend-Parsing-ibm-thread-groups-for-Shared-L2-information/20201204-125539
        git checkout 50eddc8f426f7197dab6d84dd9078ed53161c2ad
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/cacheinfo.c: In function 'get_big_core_shared_cpu_map':
>> arch/powerpc/kernel/cacheinfo.c:669:10: error: implicit declaration of function 'cpu_l2_cache_mask'; did you mean 'cpu_active_mask'? [-Werror=implicit-function-declaration]
     669 |   return cpu_l2_cache_mask(cpu);
         |          ^~~~~~~~~~~~~~~~~
         |          cpu_active_mask
>> arch/powerpc/kernel/cacheinfo.c:669:10: error: returning 'int' from a function with return type 'const struct cpumask *' makes pointer from integer without a cast [-Werror=int-conversion]
     669 |   return cpu_l2_cache_mask(cpu);
         |          ^~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +669 arch/powerpc/kernel/cacheinfo.c

   653	
   654	extern bool thread_group_shares_l2;
   655	/*
   656	 * On big-core systems, each core has two groups of CPUs each of which
   657	 * has its own L1-cache. The thread-siblings which share l1-cache with
   658	 * @cpu can be obtained via cpu_smallcore_mask().
   659	 *
   660	 * On some big-core systems, the L2 cache is shared only between some
   661	 * groups of siblings. This is already parsed and encoded in
   662	 * cpu_l2_cache_mask().
   663	 */
   664	static const struct cpumask *get_big_core_shared_cpu_map(int cpu, struct cache *cache)
   665	{
   666		if (cache->level == 1)
   667			return cpu_smallcore_mask(cpu);
   668		if (cache->level == 2 && thread_group_shares_l2)
 > 669			return cpu_l2_cache_mask(cpu);
   670	
   671		return &cache->shared_cpu_map;
   672	}
   673	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org