linux-kernel - Re: [PATCH] x86: call smp vmxoff in smp stop

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Date:   Sun, 15 Jan 2017 08:45:04 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Xishi Qiu <qiuxishi@...wei.com>
Cc:     kbuild-all@...org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        the arch/x86 maintainers <x86@...nel.org>,
        wanpeng.li@...mail.com, Andrew Morton <akpm@...ux-foundation.org>,
        hidehiro.kawai.ez@...achi.com, pbonzini@...hat.com,
        LKML <linux-kernel@...r.kernel.org>,
        Fengtiantian <fengtiantian@...wei.com>,
        Xiexiuqi <xiexiuqi@...wei.com>
Subject: Re: [PATCH] x86: call smp vmxoff in smp stop

Hi Tiantian,

[auto build test ERROR on tip/auto-latest]
[also build test ERROR on v4.10-rc3 next-20170113]
[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/Xishi-Qiu/x86-call-smp-vmxoff-in-smp-stop/20170115-075446
config: x86_64-randconfig-x017-201703 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/kernel/smp.c: In function 'smp_stop_nmi_callback':
>> arch/x86/kernel/smp.c:165:2: error: implicit declaration of function 'cpu_emergency_vmxoff' [-Werror=implicit-function-declaration]
     cpu_emergency_vmxoff();
     ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/cpu_emergency_vmxoff +165 arch/x86/kernel/smp.c

   159	static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
   160	{
   161		/* We are registered on stopping cpu too, avoid spurious NMI */
   162		if (raw_smp_processor_id() == atomic_read(&stopping_cpu))
   163			return NMI_HANDLED;
   164	
 > 165		cpu_emergency_vmxoff();
   166		stop_this_cpu(NULL);
   167	
   168		return NMI_HANDLED;

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

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