Hi Miaohe, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on linus/master next-20240523] [cannot apply to v6.9] [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/Miaohe-Lin/mm-memory-failure-simplify-put_ref_page/20240524-171903 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240524091310.1430048-8-linmiaohe%40huawei.com patch subject: [PATCH 07/13] mm/memory-failure: remove unneeded hwpoison_filter() variant config: i386-buildonly-randconfig-003-20240524 (https://download.01.org/0day-ci/archive/20240524/202405242320.8nUwcaQN-lkp@xxxxxxxxx/config) compiler: gcc-9 (Ubuntu 9.5.0-4ubuntu2) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240524/202405242320.8nUwcaQN-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/202405242320.8nUwcaQN-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): ld: mm/memory-failure.o: in function `memory_failure': >> memory-failure.c:(.text+0x2635): undefined reference to `hwpoison_filter' >> ld: memory-failure.c:(.text+0x283d): undefined reference to `hwpoison_filter' ld: mm/memory-failure.o: in function `soft_offline_page': memory-failure.c:(.text+0x2e12): undefined reference to `hwpoison_filter' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki