linux-kernel - vmlinux.o: warning: objtool: fixup_exception()+0x38d: unreachable instruction

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Date:   Mon, 28 Mar 2022 13:06:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: vmlinux.o: warning: objtool: fixup_exception()+0x38d: unreachable
 instruction

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ae085d7f9365de7da27ab5c0d16b12d51ea7fca9
commit: ed53a0d971926e484d86cce617ec02a7ee85c3fe x86/alternative: Use .ibt_endbr_seal to seal indirect calls
date:   13 days ago
config: x86_64-randconfig-r036-20220328 (https://download.01.org/0day-ci/archive/20220328/202203281242.rB7iBQGD-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed53a0d971926e484d86cce617ec02a7ee85c3fe
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ed53a0d971926e484d86cce617ec02a7ee85c3fe
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 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@...el.com>

All warnings (new ones prefixed by >>):

>> vmlinux.o: warning: objtool: fixup_exception()+0x38d: unreachable instruction

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp