Hi Herbert, I love your patch! Yet something to improve: [auto build test ERROR on herbert-cryptodev-2.6/master] [also build test ERROR on herbert-crypto-2.6/master v5.16 next-20220112] [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/Herbert-Xu/crypto-testmgr-Move-c... base: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master config: arc-buildonly-randconfig-r002-20220112 (https://download.01.org/0day-ci/archive/20220112/202201122118.9upgX2kg-lk...) compiler: arceb-elf-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/0f7cdd91b1d219ea69c7a4db6f248cd66... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Herbert-Xu/crypto-testmgr-Move-crypto_simd_disabled_for_test-out/20220111-142629 git checkout 0f7cdd91b1d219ea69c7a4db6f248cd66571444c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash 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 >>): arceb-elf-ld: crypto/testmgr.o: in function `do_ahash_op': testmgr.c:(.text+0x1286): undefined reference to `crypto_simd_disabled_for_test' arceb-elf-ld: testmgr.c:(.text+0x129e): undefined reference to `crypto_simd_disabled_for_test' arceb-elf-ld: testmgr.c:(.text+0x129e): undefined reference to `crypto_simd_disabled_for_test' arceb-elf-ld: crypto/testmgr.o: in function `test_shash_vec_cfg.isra.0': testmgr.c:(.text+0x20da): undefined reference to `crypto_simd_disabled_for_test' arceb-elf-ld: crypto/testmgr.o:testmgr.c:(.text+0x20da): more undefined references to `crypto_simd_disabled_for_test' follow --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org