linux-kernel - [tip:x86/pti 8/11] Warning: ffffffff812c4dd8: f7 0f 1f 80 00 00 testl $0x801f,(%rdi)

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Date:   Sun, 11 Feb 2018 21:43:13 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     David Woodhouse <dwmw@...zon.co.uk>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        tipbuild@...or.com, Ingo Molnar <mingo@...nel.org>
Subject: [tip:x86/pti 8/11] Warning: ffffffff812c4dd8: f7 0f 1f 80 00 00
 testl $0x801f,(%rdi)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti
head:   ff37dc0cd96c266c7700386b7ba48abc32a91b1f
commit: 930ce1a7a55bc0eb8917f453ee22f1b6d67df5cd [8/11] Revert "x86/speculation: Simplify indirect_branch_prediction_barrier()"
config: x86_64-rhel (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout 930ce1a7a55bc0eb8917f453ee22f1b6d67df5cd
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> Warning: ffffffff812c4dd8: f7 0f 1f 80 00 00 testl $0x801f,(%rdi)
   Warning: objdump says 6 bytes, but insn_get_length() says 2
   Warning: arch/x86/tools/test_get_len found difference at <kernfs_put>:ffffffff812c50b0

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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