tree: https://github.com/sbates130272/linux-p2pmem.git remap_pages_cache head: 6b6b28881f17f808a7440cf8e7e96802998e5c25 commit: d5e8cbcaf69d1e0f4613dbbf4b45b851de51b8c5 [3/6] powerpc/mm: Thread pgprot_t through create_section_mapping() config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout d5e8cbcaf69d1e0f4613dbbf4b45b851de51b8c5 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/powerpc/mm/book3s64/radix_pgtable.c: In function 'stop_machine_change_mapping': -1, PAGE_KERNEl); ^~~~~~~~~~~ PAGE_KERNEL arch/powerpc/mm/book3s64/radix_pgtable.c:713:9: note: each undeclared identifier is reported only once for each function it appears in vim +713 arch/powerpc/mm/book3s64/radix_pgtable.c 699 700 static int __meminit stop_machine_change_mapping(void *data) 701 { 702 struct change_mapping_params *params = 703 (struct change_mapping_params *)data; 704 705 if (!data) 706 return -1; 707 708 spin_unlock(&init_mm.page_table_lock); 709 pte_clear(&init_mm, params->aligned_start, params->pte); 710 create_physical_mapping(__pa(params->aligned_start), 711 __pa(params->start), -1, PAGE_KERNEL); 712 create_physical_mapping(__pa(params->end), __pa(params->aligned_end), 714 spin_lock(&init_mm.page_table_lock); 715 return 0; 716 } 717 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation