linux-kernel - [peterz-queue:x86/wip.ibt 39/39] arch/x86/crypto/chacha-x86_64.lto.o: warning: objtool: chacha_2block_xor_avx512vl() falls through to next function chacha_8block_xor

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Date:   Wed, 23 Feb 2022 01:03:08 +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: [peterz-queue:x86/wip.ibt 39/39]
 arch/x86/crypto/chacha-x86_64.lto.o: warning: objtool:
 chacha_2block_xor_avx512vl() falls through to next function
 chacha_8block_xor_avx512vl()

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/wip.ibt
head:   1436dce5f32d577e8cef693e09f4bb1faa0e2692
commit: 1436dce5f32d577e8cef693e09f4bb1faa0e2692 [39/39] x86/alternative: Use .ibt_endbr_sites to seal indirect calls
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20220223/202202230017.1CJQVqhv-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=1436dce5f32d577e8cef693e09f4bb1faa0e2692
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue x86/wip.ibt
        git checkout 1436dce5f32d577e8cef693e09f4bb1faa0e2692
        # 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/crypto/chacha-x86_64.lto.o: warning: objtool: chacha_2block_xor_avx512vl() falls through to next function chacha_8block_xor_avx512vl()
>> arch/x86/crypto/chacha-x86_64.lto.o: warning: objtool: chacha_4block_xor_avx512vl() falls through to next function chacha_8block_xor_avx512vl()

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