tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c2e7554e1b85935d962127efa3c2a76483b0b3b6
commit: f9f130ff2ec93c5949576bbfb168cc9530c23649 powerpc/numa: Detect support for coregroup
date:   9 weeks ago
config: powerpc64-randconfig-c003-20201104 (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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9f130ff2ec93c5949576bbfb168cc9530c23649
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout f9f130ff2ec93c5949576bbfb168cc9530c23649
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 

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 >>):

>> powerpc64-linux-ld: arch/powerpc/mm/numa.o:(.toc+0x0): undefined reference to `coregroup_enabled'
   powerpc64-linux-ld: mm/page_alloc.o:(.toc+0x0): undefined reference to `node_reclaim_distance'
   powerpc64-linux-ld: mm/khugepaged.o:(.toc+0x0): undefined reference to `node_reclaim_distance'

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