Hi Dov, Thank you for the patch! Yet something to improve: [auto build test ERROR on 60a9483534ed0d99090a2ee1d4bb0b8179195f51] url: https://github.com/0day-ci/linux/commits/Dov-Murik/Allow-guest-access-to-... base: 60a9483534ed0d99090a2ee1d4bb0b8179195f51 config: riscv-allmodconfig (attached as .config) compiler: riscv64-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/0day-ci/linux/commit/666035eb88583c145049b34282634d7ba... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Dov-Murik/Allow-guest-access-to-EFI-confidential-computing-secret-area/20211014-211522 git checkout 666035eb88583c145049b34282634d7ba716dc12 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=riscv 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 >>): drivers/virt/coco/efi_secret/efi_secret.c: In function 'wipe_memory': 117 | clflush_cache_range(addr, size); | ^~~~~~~~~~~~~~~~~~~ | flush_cache_range cc1: all warnings being treated as errors vim +117 drivers/virt/coco/efi_secret/efi_secret.c 109 110 /* 111 * Overwrite memory content with zeroes, and ensure that dirty cache lines are 112 * actually written back to memory, to clear out the secret. 113 */ 114 static void wipe_memory(void *addr, size_t size) 115 { 116 memzero_explicit(addr, size); 118 } 119 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org