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Subjectarch/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@intel.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
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