linux-kernel - Re: [PATCH v2 1/2] KVM: X86: Implement PV IPI in linux guest

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Date:   Mon, 2 Jul 2018 21:33:21 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Wanpeng Li <kernellwp@...il.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH v2 1/2] KVM: X86: Implement PV IPI in linux guest

Hi Wanpeng,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.18-rc3 next-20180702]
[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/Wanpeng-Li/KVM-x86-Add-PV-IPIs-support/20180702-193633
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-randconfig-x003-201826 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Wanpeng-Li/KVM-x86-Add-PV-IPIs-support/20180702-193633 HEAD 2601a46efa23f54a8f175cd07dae28c88e36a40d builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   arch/x86/kernel/kvm.c: In function 'kvm_apic_init':
>> arch/x86/kernel/kvm.c:714:27: error: 'KVM_FEATURE_PV_SEND_IPI' undeclared (first use in this function); did you mean 'KVM_FEATURE_PV_EOI'?
     if (kvm_para_has_feature(KVM_FEATURE_PV_SEND_IPI) &&
                              ^~~~~~~~~~~~~~~~~~~~~~~
                              KVM_FEATURE_PV_EOI
   arch/x86/kernel/kvm.c:714:27: note: each undeclared identifier is reported only once for each function it appears in

vim +714 arch/x86/kernel/kvm.c

   710	
   711	static void __init kvm_apic_init(void)
   712	{
   713	#if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
 > 714		if (kvm_para_has_feature(KVM_FEATURE_PV_SEND_IPI) &&
   715			num_possible_cpus() <= 2 * BITS_PER_LONG)
   716			kvm_setup_pv_ipi();
   717	#endif
   718	}
   719	

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

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