Hi Sumanth, kernel test robot noticed the following build errors: [auto build test ERROR on s390/features] [also build test ERROR on kvms390/next linus/master v6.7-rc1] [cannot apply to akpm-mm/mm-everything next-20231117] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Sumanth-Korikkar/mm-memory_hotplug-fix-memory-hotplug-locking-order/20231115-035455 base: https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git features patch link: https://lore.kernel.org/r/20231114180238.1522782-4-sumanthk%40linux.ibm.com patch subject: [PATCH 3/8] mm: use vmem_altmap code without CONFIG_ZONE_DEVICE config: x86_64-buildonly-randconfig-002-20231118 (https://download.01.org/0day-ci/archive/20231118/202311180545.VeyRXEDq-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231118/202311180545.VeyRXEDq-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311180545.VeyRXEDq-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: arch/x86/mm/init_64.o: in function `remove_pagetable': >> init_64.c:(.meminit.text+0xfc7): undefined reference to `vmem_altmap_free' ld: mm/memory_hotplug.o: in function `__add_pages': >> memory_hotplug.c:(.ref.text+0xc01): undefined reference to `vmem_altmap_offset' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
