[kbuild-all] [luxis1999-iommufd:iommufd-v5.16-rc3 15/25] ERROR: modpost: "vfio_platform_ops" [drivers/vfio/platform/vfio-platform.ko] undefined!

tree: https://github.com/luxis1999/iommufd iommufd-v5.16-rc3 head: 21c1bb93447d6cced2f486cdb68b92d11f2e664d commit: efdbba2a0f53aec4a2774306cead86075b7351b4 [15/25] vifo_platform: Use vfio_alloc/put_device() config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20211217/202112170050.8LrWj0Aj-lk...) compiler: m68k-linux-gcc (GCC) 11.2.0 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/luxis1999/iommufd/commit/efdbba2a0f53aec4a2774306cead8... git remote add luxis1999-iommufd https://github.com/luxis1999/iommufd git fetch --no-tags luxis1999-iommufd iommufd-v5.16-rc3 git checkout efdbba2a0f53aec4a2774306cead86075b7351b4 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash 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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org