[kbuild-all] arch/x86/entry/entry_64.o: warning: objtool: .entry.text+0xb11: unreachable instruction

CC: linux-kernel(a)vger.kernel.org TO: Thomas Gleixner <tglx(a)linutronix.de&gt; CC: Alexandre Chartre <alexandre.chartre(a)oracle.com&gt; Hi Thomas, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 1b5044021070efa3259f3e9548dc35d1eb6aa844 commit: 6271fef00b3489690e52ce95edbc378357513547 x86/entry: Convert NMI to IDTENTRY_NMI date: 7 days ago config: x86_64-randconfig-r025-20200618 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) 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 git checkout 6271fef00b3489690e52ce95edbc378357513547 # 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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org