linux-kernel - Re: [PATCH] x86/hyperv: make vapic support x2apic mode

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Message-ID: <20191001091819.GA17478@rkaganb>
Date:   Tue, 1 Oct 2019 09:18:23 +0000
From:   Roman Kagan <rkagan@...tuozzo.com>
To:     kbuild test robot <lkp@...el.com>
CC:     "kbuild-all@...org" <kbuild-all@...org>,
        Michael Kelley <mikelley@...rosoft.com>,
        Lan Tianyu <Tianyu.Lan@...rosoft.com>,
        Joerg Roedel <jroedel@...e.de>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH] x86/hyperv: make vapic support x2apic mode

On Tue, Oct 01, 2019 at 06:44:08AM +0800, kbuild test robot wrote:
> url:    https://github.com/0day-ci/linux/commits/Roman-Kagan/x86-hyperv-make-vapic-support-x2apic-mode/20191001-044238
> config: x86_64-randconfig-e004-201939 (attached as .config)
> compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
> reproduce:
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    arch/x86/hyperv/hv_apic.c: In function 'hv_x2apic_read':
> >> arch/x86/hyperv/hv_apic.c:91:10: error: implicit declaration of function 'native_apic_msr_read'; did you mean 'native_apic_icr_read'? [-Werror=implicit-function-declaration]
>       return native_apic_msr_read(reg);
>              ^~~~~~~~~~~~~~~~~~~~
>              native_apic_icr_read
>    arch/x86/hyperv/hv_apic.c: In function 'hv_x2apic_write':
> >> arch/x86/hyperv/hv_apic.c:119:3: error: implicit declaration of function 'native_apic_msr_write'; did you mean 'native_apic_icr_write'? [-Werror=implicit-function-declaration]
>       native_apic_msr_write(reg, val);
>       ^~~~~~~~~~~~~~~~~~~~~
>       native_apic_icr_write
>    cc1: some warnings being treated as errors

Oops, !CONFIG_X86_X2APIC needs to be handled.  Will post v2.

Roman.