linux-kernel - Re: [PATCH] x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi

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Date:   Thu, 1 Dec 2016 19:36:33 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kbuild-all@...org, x86@...nel.org, devel@...uxdriverproject.org,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] x86/hyperv: Handle unknown NMIs on one CPU when
 unknown_nmi_panic

Hi Vitaly,

[auto build test ERROR on tip/x86/core]
[also build test ERROR on v4.9-rc7 next-20161130]
[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-hyperv-Handle-unknown-NMIs-on-one-CPU-when-unknown_nmi_panic/20161201-171219
config: i386-randconfig-x014-201648 (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=i386 

All errors (new ones prefixed by >>):

   arch/x86/kernel/cpu/mshyperv.c: In function 'hv_nmi_unknown':
>> arch/x86/kernel/cpu/mshyperv.c:171:7: error: 'unknown_nmi_panic' undeclared (first use in this function)
     if (!unknown_nmi_panic)
          ^~~~~~~~~~~~~~~~~
   arch/x86/kernel/cpu/mshyperv.c:171:7: note: each undeclared identifier is reported only once for each function it appears in

vim +/unknown_nmi_panic +171 arch/x86/kernel/cpu/mshyperv.c

   165	 * unknown NMI on the first CPU which gets it.
   166	 */
   167	static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs)
   168	{
   169		static atomic_t nmi_cpu = ATOMIC_INIT(-1);
   170	
 > 171		if (!unknown_nmi_panic)
   172			return NMI_DONE;
   173	
   174		if (atomic_cmpxchg(&nmi_cpu, -1, raw_smp_processor_id()) != -1)

---
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