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From:   Vitaly Kuznetsov <vkuznets@redhat.com>
To:     kbuild test robot <lkp@intel.com>
Cc:     kbuild-all@01.org, kvm@vger.kernel.org, x86@kernel.org,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
        "Michael Kelley \(EOSG\)" <Michael.H.Kelley@microsoft.com>,
        Ingo Molnar <mingo@redhat.com>,
        Roman Kagan <rkagan@virtuozzo.com>,
        Andy Lutomirski <luto@kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Mohammed Gamal <mmorsy@redhat.com>
Subject: Re: [PATCH v3 3/7] x86/hyper-v: reenlightenment notifications support
References: <20180116182700.1042-4-vkuznets@redhat.com>
        <201801191841.QZ26OYif%fengguang.wu@intel.com>
Date:   Fri, 19 Jan 2018 11:47:34 +0100
In-Reply-To: <201801191841.QZ26OYif%fengguang.wu@intel.com> (kbuild test
        robot's message of "Fri, 19 Jan 2018 18:21:34 +0800")
Message-ID: <87o9lqdt15.fsf@vitty.brq.redhat.com>
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kbuild test robot <lkp@intel.com> writes:

> Hi Vitaly,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on tip/auto-latest]
> [also build test WARNING on v4.15-rc8 next-20180118]
> [cannot apply to tip/x86/core kvm/linux-next]
> [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/Vitaly-Kuznetsov/x86-kvm-hyperv-stable-clocksorce-for-L2-guests-when-running-nested-KVM-on-Hyper-V/20180119-160814
> config: x86_64-allmodconfig (attached as .config)
> compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
>
> All warnings (new ones prefixed by >>):
>
>    In file included from include/linux/kasan.h:17:0,
>                     from include/linux/slab.h:129,
>                     from include/linux/irq.h:26,
>                     from arch/x86/include/asm/hardirq.h:6,
>                     from include/linux/hardirq.h:9,
>                     from include/linux/interrupt.h:13,
>                     from arch/x86/include/asm/mshyperv.h:8,
>                     from arch/x86//entry/vdso/vdso32/../vclock_gettime.c:20,
>                     from arch/x86//entry/vdso/vdso32/vclock_gettime.c:33:
>    arch/x86/include/asm/pgtable.h: In function 'clone_pgd_range':
>    arch/x86/include/asm/pgtable.h:1129:9: error: implicit declaration of function 'kernel_to_user_pgdp'; did you mean 'u64_to_user_ptr'? [-Werror=implicit-function-declaration]
>      memcpy(kernel_to_user_pgdp(dst), kernel_to_user_pgdp(src),
>             ^~~~~~~~~~~~~~~~~~~

Sorry but I'm failing to see how this (and all the rest) is related to
my patch ...

[snip]

-- 
  Vitaly