linux-kernel - arch/x86/kvm/cpuid.c:128:26: warning: no previous prototype for function 'kvm_find_kvm_cpuid

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Date:   Sun, 14 Nov 2021 11:08:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Paul Durrant <pdurrant@...zon.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Subject: arch/x86/kvm/cpuid.c:128:26: warning: no previous prototype for
 function 'kvm_find_kvm_cpuid_features'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c8c109546a19613d323a319d0c921cb1f317e629
commit: 760849b1476c94da4cca5d3a5f0a1f64ffc92ba4 KVM: x86: Make sure KVM_CPUID_FEATURES really are KVM_CPUID_FEATURES
date:   2 days ago
config: x86_64-randconfig-a016-20211113 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dddeeafb529e769cde87bd29ef6271ac6bfa5c)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=760849b1476c94da4cca5d3a5f0a1f64ffc92ba4
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 760849b1476c94da4cca5d3a5f0a1f64ffc92ba4
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kvm/cpuid.c:128:26: warning: no previous prototype for function 'kvm_find_kvm_cpuid_features' [-Wmissing-prototypes]
   struct kvm_cpuid_entry2 *kvm_find_kvm_cpuid_features(struct kvm_vcpu *vcpu)
                            ^
   arch/x86/kvm/cpuid.c:128:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct kvm_cpuid_entry2 *kvm_find_kvm_cpuid_features(struct kvm_vcpu *vcpu)
   ^
   static 
   1 warning generated.


vim +/kvm_find_kvm_cpuid_features +128 arch/x86/kvm/cpuid.c

   127	
 > 128	struct kvm_cpuid_entry2 *kvm_find_kvm_cpuid_features(struct kvm_vcpu *vcpu)
   129	{
   130		u32 base = vcpu->arch.kvm_cpuid_base;
   131	
   132		if (!base)
   133			return NULL;
   134	
   135		return kvm_find_cpuid_entry(vcpu, base | KVM_CPUID_FEATURES, 0);
   136	}
   137	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (38335 bytes)