Hi Wang, Thank you for the patch! Yet something to improve: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Wang-Wenhu/mm-eliminate-ifdef-of-HAVE_IOREMAP_PROT-in-c-files/20220615-140135 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything config: m68k-buildonly-randconfig-r001-20220622 (https://download.01.org/0day-ci/archive/20220622/202206221102.w7hylFXN-lkp@xxxxxxxxx/config) compiler: m68k-linux-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/b20efcc877829b6f416cf111bd5ad2b13a0cd08e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Wang-Wenhu/mm-eliminate-ifdef-of-HAVE_IOREMAP_PROT-in-c-files/20220615-140135 git checkout b20efcc877829b6f416cf111bd5ad2b13a0cd08e # 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=m68k 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 >>): >> m68k-linux-ld: drivers/char/mem.o:(.rodata+0x37c): undefined reference to `generic_access_phys' -- 0-DAY CI Kernel Test Service https://01.org/lkp