tree: git://git.infradead.org/users/jjs/linux-tpmdd.git next head: fa05dc792ea02043f3c21467cb4485a38ac19bdf commit: fa05dc792ea02043f3c21467cb4485a38ac19bdf [3/3] tpm: tpm_tis: Make implementation of read16, read32 and write32 optional config: arm-randconfig-r016-20200514 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project a52f10b5a382c040e7ad1ce933cda6c07a4b3a8d) reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi git checkout fa05dc792ea02043f3c21467cb4485a38ac19bdf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected ld.lld: warning: lld uses blx instruction, no object with architecture supporting feature detected -- -- --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org