arch/x86/entry/entry_64.o: warning: objtool: .entry.text+0xb11: unreachable instruction

arch/x86/entry/entry_64.o: warning: objtool: .entry.text+0xb11: unreachable instruction

[kernel test robot]

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CC: linux-kernel(a)vger.kernel.org
TO: Thomas Gleixner <tglx@linutronix.de>
CC: Alexandre Chartre <alexandre.chartre@oracle.com>

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@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> arch/x86/entry/entry_64.o: warning: objtool: .entry.text+0xb11: unreachable instruction

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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