tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git memblock/iterators-cleanup/v3 head: f0d593460d044672ca2ea065efc283e30dd23ef1 commit: 01b2e0673f21479222dd0f387b5b73ec037d8096 [12/17] arch, drivers: replace for_each_membock() with for_each_mem_range() config: s390-allyesconfig (attached as .config) compiler: s390-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 01b2e0673f21479222dd0f387b5b73ec037d8096 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/s390/mm/vmem.c: In function 'vmem_map_init': 561 | vmem_add_mem(start, end - start); | ^~~~~~~~~~~~ | vmem_add_range cc1: some warnings being treated as errors vim +561 arch/s390/mm/vmem.c 549 550 /* 551 * map whole physical memory to virtual memory (identity mapping) 552 * we reserve enough space in the vmalloc area for vmemmap to hotplug 553 * additional memory segments. 554 */ 555 void __init vmem_map_init(void) 556 { 557 phys_addr_t start, end; 558 u64 i; 559 560 for_each_mem_range(i, &start, &end) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org