TO: Vasily Gorbik <gor(a)linux.ibm.com&gt; CC: Josh Poimboeuf <jpoimboe(a)redhat.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git objtool/core head: c199f64ff93c48a45add92eee4456ffcabfc838e commit: f1069a8756b9e9f6c055e709740d2d66650f0fb0 [2/3] compiler.h: Avoid using inline asm operand modifiers config: x86_64-randconfig-a002-20210523 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e84a9b9bb3051c35dea993cdad7b3d2575638f85) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue objtool/core git checkout f1069a8756b9e9f6c055e709740d2d66650f0fb0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): -- --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org