[kbuild-all] [tobetter-linux:odroid-5.9.y 52/71] ERROR: modpost: "phys_mem_access_prot" undefined!

tree: https://github.com/tobetter/linux odroid-5.9.y head: 2e44fdfeec714a226a3059ba845123c57d955ba8 commit: eaeee72871983a731ad2bd7aa5b558e1e583b556 [52/71] ODROID-XU4: char: exynos: add /dev/gpiomem device for rootless user GPIO access config: x86_64-randconfig-s021-20201012 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-rc1-dirty # https://github.com/tobetter/linux/commit/eaeee72871983a731ad2bd7aa5b558e1... git remote add tobetter-linux https://github.com/tobetter/linux git fetch --no-tags tobetter-linux odroid-5.9.y git checkout eaeee72871983a731ad2bd7aa5b558e1e583b556 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 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