Hi Christophe, Thank you for the patch! Yet something to improve: [auto build test ERROR on powerpc/next] [also build test ERROR on v5.5-rc5 next-20200106] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/powerpc-32-refactor-pmd_offset-pud_offset-pgd_offset/20200107-210342 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-pmac32_defconfig (attached as .config) compiler: powerpc-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag Reported-by: kbuild test robot All errors (new ones prefixed by >>): arch/powerpc/mm/mem.c: In function 'virt_to_kpte': >> arch/powerpc/mm/mem.c:71:43: error: macro "pte_offset_kernel" requires 2 arguments, but only 1 given return pte_offset_kernel(pmd_ptr_k(vaddr)); ^ >> arch/powerpc/mm/mem.c:71:9: error: 'pte_offset_kernel' undeclared (first use in this function); did you mean 'pte_free_kernel'? return pte_offset_kernel(pmd_ptr_k(vaddr)); ^~~~~~~~~~~~~~~~~ pte_free_kernel arch/powerpc/mm/mem.c:71:9: note: each undeclared identifier is reported only once for each function it appears in arch/powerpc/mm/mem.c:72:1: error: control reaches end of non-void function [-Werror=return-type] } ^ cc1: all warnings being treated as errors vim +/pte_offset_kernel +71 arch/powerpc/mm/mem.c 68 69 static inline pte_t *virt_to_kpte(unsigned long vaddr) 70 { > 71 return pte_offset_kernel(pmd_ptr_k(vaddr)); 72 } 73 #endif 74 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation