Hi zhenwei, Thank you for the patch! Yet something to improve: [auto build test ERROR on akpm-mm/mm-everything] [also build test ERROR on next-20220519] [cannot apply to linux/master linus/master v5.18-rc7] [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] url: https://github.com/intel-lab-lkp/linux/commits/zhenwei-pi/recover-hardware-corrupted-page-by-virtio-balloon/20220520-151328 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything config: arm-randconfig-r026-20220519 (https://download.01.org/0day-ci/archive/20220520/202205202330.u0vQWiWG-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 11.3.0 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 # https://github.com/intel-lab-lkp/linux/commit/a42127073dd4adb6354649c8235c5cde033d01f2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review zhenwei-pi/recover-hardware-corrupted-page-by-virtio-balloon/20220520-151328 git checkout a42127073dd4adb6354649c8235c5cde033d01f2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: drivers/virtio/virtio_balloon.o: in function `unpoison_memory_func': >> virtio_balloon.c:(.text+0x89a): undefined reference to `unpoison_memory' arm-linux-gnueabi-ld: drivers/virtio/virtio_balloon.o: in function `virtballoon_probe': >> virtio_balloon.c:(.text+0x111a): undefined reference to `register_memory_failure_notifier' arm-linux-gnueabi-ld: drivers/virtio/virtio_balloon.o: in function `virtballoon_remove': >> virtio_balloon.c:(.text+0x12a2): undefined reference to `unregister_memory_failure_notifier' -- 0-DAY CI Kernel Test Service https://01.org/lkp
