tree: https://github.com/stffrdhrn/linux.git starfive-bad-dcache-flush head: a5c948a9cc2b8944f00056c067fb7bde19b34843 commit: c9f02856ce72f3de501b56484ecdc71e261fdaa5 [4/39] drivers/hw_random: Add Starfive VIC Random Number Generator driver config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/stffrdhrn/linux/commit/c9f02856ce72f3de501b56484ecdc71... git remote add stffrdhrn https://github.com/stffrdhrn/linux.git git fetch --no-tags stffrdhrn starfive-bad-dcache-flush git checkout c9f02856ce72f3de501b56484ecdc71e261fdaa5 # save the attached .config to linux build tree make W=1 ARCH=um 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