[kbuild-all] arch/x86/kernel/paravirt.o: warning: objtool: paravirt_BUG()+0x3: unreachable instruction

CC: linux-kernel(a)vger.kernel.org TO: Juergen Gross <jgross(a)suse.com&gt; CC: Borislav Petkov <bp(a)suse.de&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 50be9417e23af5a8ac860d998e1e3f06b8fd79d7 commit: fafe5e74229fd3f425e3cbfc68b90e615aa6d62f x86/paravirt: Switch functions with custom code to ALTERNATIVE date: 4 months ago config: x86_64-randconfig-r023-20210709 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fafe5e74229fd3f425e3cbfc68b90e615aa6d62f # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 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 warnings (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org