tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c7d102232649226a69dddd58a4942cf13cff4f7c
commit: fe3dc333d2ed50c9764d281869d87bae0d795ce5 powerpc/mmu: Don't duplicate radix_enabled()
date:   3 months ago
config: powerpc64-randconfig-r013-20210731 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 10.3.0
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=fe3dc333d2ed50c9764d281869d87bae0d795ce5
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout fe3dc333d2ed50c9764d281869d87bae0d795ce5
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash

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 >>):

   powerpc-linux-ld: arch/powerpc/mm/book3s64/pgtable.o: in function `.create_section_mapping':
>> (.meminit.text+0x3c): undefined reference to `.radix__create_section_mapping'
   powerpc-linux-ld: arch/powerpc/mm/book3s64/pgtable.o: in function `.remove_section_mapping':
>> (.meminit.text+0x90): undefined reference to `.radix__remove_section_mapping'

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