tree: https://github.com/hnaz/linux-mm master head: a017b085735719105714da692a82a6eeb8830718 commit: f48b9eb10f8c3f378ea4552fee58db3dea980e62 [60/194] mm: consolidate pte_index() and pte_offset_*() definitions config: sparc-defconfig (attached as .config) compiler: sparc-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 git checkout f48b9eb10f8c3f378ea4552fee58db3dea980e62 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/mm.h:31, from include/linux/memblock.h:13, from arch/sparc/mm/srmmu.c:14: 74 | #define pte_offset_kernel pte_offset_kernel | ^~~~~~~~~~~~~~~~~ 144 | pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address) | ^~~~~~~~~~~~~~~~~ include/linux/pgtable.h:70:22: note: previous definition of 'pte_offset_kernel' was here 70 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) | ^~~~~~~~~~~~~~~~~ arch/sparc/mm/srmmu.c: In function 'poke_hypersparc': arch/sparc/mm/srmmu.c:1093:25: error: variable 'clear' set but not used [-Werror=unused-but-set-variable] 1093 | volatile unsigned long clear; | ^~~~~ cc1: all warnings being treated as errors vim +/pte_offset_kernel +74 include/linux/pgtable.h 68 69 #ifndef pte_offset_kernel 70 static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) 71 { 72 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); 73 } 75 #endif 76 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org