Hi Linus, I love your patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on soc/for-next robh/for-next linus/master v5.13-rc1 next-20210511] [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/0day-ci/linux/commits/Linus-Walleij/hw_random-ixp4xx-e... base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 6efb943b8616ec53a5e444193dccf1af9ad627b5 config: microblaze-randconfig-s032-20210511 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/3df0348614ea703ac178e060dd1663801... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Linus-Walleij/hw_random-ixp4xx-enable-compile-testing/20210511-213010 git checkout 3df0348614ea703ac178e060dd1663801c2d02cd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=microblaze 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 >>): 24 | #include <linux/soc/ixp4xx/cpu.h> | ^~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. vim +24 drivers/char/hw_random/ixp4xx-rng.c 25 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org