Hi "Aneesh,

I love your patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on v5.13 next-20210628]
[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/Aneesh-Kumar-K-V/Add-support-for-FORM2-associativity/20210628-231546
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-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/fcbc8b19e99b1cf44fde904817f19616c6baecdb
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Aneesh-Kumar-K-V/Add-support-for-FORM2-associativity/20210628-231546
        git checkout fcbc8b19e99b1cf44fde904817f19616c6baecdb
        # 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 warnings (new ones prefixed by >>):

>> arch/powerpc/mm/numa.c:298:6: warning: no previous prototype for 'update_numa_distance' [-Wmissing-prototypes]
     298 | void update_numa_distance(struct device_node *node)
         |      ^~~~~~~~~~~~~~~~~~~~


vim +/update_numa_distance +298 arch/powerpc/mm/numa.c

   294	
   295	/*
   296	 * Used to update distance information w.r.t newly added node.
   297	 */
 > 298	void update_numa_distance(struct device_node *node)
   299	{
   300		if (affinity_form == FORM0_AFFINITY)
   301			return;
   302		else if (affinity_form == FORM1_AFFINITY) {
   303			initialize_form1_numa_distance(node);
   304			return;
   305		}
   306	}
   307	

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