linux-kernel - [intel-tdx:guest 143/144] arch/x86/kernel/head_64.o: warning: objtool: verify

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Date:   Wed, 8 Dec 2021 09:32:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
Subject: [intel-tdx:guest 143/144] arch/x86/kernel/head_64.o: warning:
 objtool: verify_cpu()+0x4d: unreachable instruction

tree:   https://github.com/intel/tdx.git guest
head:   41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614
commit: 4844d5297235bef6b92fe9d0649d2f066f623d5a [143/144] [REVERTME] x86/tdx: Add CONFIG option for KVM SDV workarounds
config: x86_64-randconfig-a001-20211207 (https://download.01.org/0day-ci/archive/20211208/202112080910.XQ4yN1LA-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/4844d5297235bef6b92fe9d0649d2f066f623d5a
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest
        git checkout 4844d5297235bef6b92fe9d0649d2f066f623d5a
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/head_64.o: warning: objtool: verify_cpu()+0x4d: unreachable instruction

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