linux-kernel - Re: [PATCH 1/3] KVM: x86: expose UMWAIT/UMONITOR/TPAUSE CPU features into VM.

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Date:   Tue, 10 Jul 2018 19:53:39 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Jingqi Liu <jingqi.liu@...el.com>
Cc:     kbuild-all@...org, pbonzini@...hat.com, rkrcmar@...hat.com,
        tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        wei.w.wang@...el.com, Jingqi Liu <jingqi.liu@...el.com>
Subject: Re: [PATCH 1/3] KVM: x86: expose UMWAIT/UMONITOR/TPAUSE CPU features
 into VM.

Hi Jingqi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.18-rc4 next-20180709]
[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/Jingqi-Liu/KVM-x86-expose-a-few-new-features-into-VM/20180710-171958
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: x86_64-randconfig-x012-201827 (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 

All error/warnings (new ones prefixed by >>):

   arch/x86/kvm/cpuid.c: In function '__do_cpuid_ent':
>> arch/x86/kvm/cpuid.c:68:18: error: 'X86_FEATURE_WAITPKG' undeclared (first use in this function); did you mean 'X86_FEATURE_MWAITX'?
    #define F(x) bit(X86_FEATURE_##x)
                     ^
>> arch/x86/kvm/cpuid.c:409:17: note: in expansion of macro 'F'
      F(CLDEMOTE) | F(WAITPKG);
                    ^
   arch/x86/kvm/cpuid.c:68:18: note: each undeclared identifier is reported only once for each function it appears in
    #define F(x) bit(X86_FEATURE_##x)
                     ^
>> arch/x86/kvm/cpuid.c:409:17: note: in expansion of macro 'F'
      F(CLDEMOTE) | F(WAITPKG);
                    ^

vim +68 arch/x86/kvm/cpuid.c

4ff41732 Paolo Bonzini 2014-02-24  67  
5c404cab Paolo Bonzini 2014-12-03 @68  #define F(x) bit(X86_FEATURE_##x)
5c404cab Paolo Bonzini 2014-12-03  69  

:::::: The code at line 68 was first introduced by commit
:::::: 5c404cabd1b5c125653ac573cb9284bdf42b658a KVM: x86: use F() macro throughout cpuid.c

:::::: TO: Paolo Bonzini <pbonzini@...hat.com>
:::::: CC: Paolo Bonzini <pbonzini@...hat.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
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