linux-kernel - Re: [PATCH v2 2/5] arm64: Work around Falkor erratum 1003

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Date:   Fri, 30 Dec 2016 10:44:23 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Christopher Covington <cov@...eaurora.org>
Cc:     kbuild-all@...org, Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Marc Zyngier <marc.zyngier@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, shankerd@...eaurora.org,
        timur@...eaurora.org, Jonathan Corbet <corbet@....net>,
        linux-doc@...r.kernel.org,
        Christopher Covington <cov@...eaurora.org>
Subject: Re: [PATCH v2 2/5] arm64: Work around Falkor erratum 1003

Hi Shanker,

[auto build test ERROR on next-20161224]
[also build test ERROR on v4.10-rc1]
[cannot apply to arm64/for-next/core v4.9-rc8 v4.9-rc7 v4.9-rc6]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Christopher-Covington/arm64-Define-Falkor-v1-CPU/20161230-081412
config: arm64-allnoconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All errors (new ones prefixed by >>):

   arch/arm64/mm/context.c: In function 'flush_context':
>> arch/arm64/mm/context.c:93:13: error: 'CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID' undeclared (first use in this function)
      __set_bit(CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID, asid_map);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/mm/context.c:93:13: note: each undeclared identifier is reported only once for each function it appears in
   arch/arm64/mm/context.c: In function 'asids_init':
   arch/arm64/mm/context.c:255:13: error: 'CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID' undeclared (first use in this function)
      __set_bit(CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID, asid_map);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID +93 arch/arm64/mm/context.c

    87		/* Update the list of reserved ASIDs and the ASID bitmap. */
    88		bitmap_clear(asid_map, 0, NUM_USER_ASIDS);
    89	
    90		/* Reserve ASID for Falkor erratum 1003 */
    91		if (IS_ENABLED(CONFIG_QCOM_FALKOR_ERRATUM_1003) &&
    92		    cpus_have_cap(ARM64_WORKAROUND_QCOM_FALKOR_E1003))
  > 93			__set_bit(CONFIG_QCOM_FALKOR_E1003_RESERVED_ASID, asid_map);
    94	
    95		/*
    96		 * Ensure the generation bump is observed before we xchg the

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