linux-kernel - [intel-tdx:kvm-upstream 81/152] arch/x86/kvm/vmx/tdx_stubs.c:16:5: warning: no previous prototype for function 'tdx_vcpu

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Message-ID: <202112170506.mzq5TF3w-lkp@intel.com>
Date:   Fri, 17 Dec 2021 05:25:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Isaku Yamahata <isaku.yamahata@...el.com>
Subject: [intel-tdx:kvm-upstream 81/152] arch/x86/kvm/vmx/tdx_stubs.c:16:5:
 warning: no previous prototype for function 'tdx_vcpu_ioctl'

tree:   https://github.com/intel/tdx.git kvm-upstream
head:   bdfe06c17daab60c196ff80c1d98467a1d3734fa
commit: 2a1d7e9bae19b842ad5ac81f5e0b549066b58ff7 [81/152] KVM: TDX: Do TDX specific vcpu initialization
config: x86_64-randconfig-a013-20211216 (https://download.01.org/0day-ci/archive/20211217/202112170506.mzq5TF3w-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dd245bab9fbb364faa1581e4f92ba3119a872fba)
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://github.com/intel/tdx/commit/2a1d7e9bae19b842ad5ac81f5e0b549066b58ff7
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream
        git checkout 2a1d7e9bae19b842ad5ac81f5e0b549066b58ff7
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kvm/

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/vmx/tdx_stubs.c:4:13: warning: no previous prototype for function 'tdx_pre_kvm_init' [-Wmissing-prototypes]
   void __init tdx_pre_kvm_init(unsigned int *vcpu_size,
               ^
   arch/x86/kvm/vmx/tdx_stubs.c:4:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init tdx_pre_kvm_init(unsigned int *vcpu_size,
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:6:12: warning: no previous prototype for function 'tdx_hardware_setup' [-Wmissing-prototypes]
   int __init tdx_hardware_setup(struct kvm_x86_ops *x86_ops) { return -EOPNOTSUPP; }
              ^
   arch/x86/kvm/vmx/tdx_stubs.c:6:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __init tdx_hardware_setup(struct kvm_x86_ops *x86_ops) { return -EOPNOTSUPP; }
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:7:6: warning: no previous prototype for function 'tdx_hardware_enable' [-Wmissing-prototypes]
   void tdx_hardware_enable(void) {}
        ^
   arch/x86/kvm/vmx/tdx_stubs.c:7:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void tdx_hardware_enable(void) {}
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:8:6: warning: no previous prototype for function 'tdx_hardware_disable' [-Wmissing-prototypes]
   void tdx_hardware_disable(void) {}
        ^
   arch/x86/kvm/vmx/tdx_stubs.c:8:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void tdx_hardware_disable(void) {}
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:10:5: warning: no previous prototype for function 'tdx_vcpu_create' [-Wmissing-prototypes]
   int tdx_vcpu_create(struct kvm_vcpu *vcpu) { return -EOPNOTSUPP; }
       ^
   arch/x86/kvm/vmx/tdx_stubs.c:10:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tdx_vcpu_create(struct kvm_vcpu *vcpu) { return -EOPNOTSUPP; }
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:11:6: warning: no previous prototype for function 'tdx_vcpu_free' [-Wmissing-prototypes]
   void tdx_vcpu_free(struct kvm_vcpu *vcpu) {}
        ^
   arch/x86/kvm/vmx/tdx_stubs.c:11:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void tdx_vcpu_free(struct kvm_vcpu *vcpu) {}
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:12:6: warning: no previous prototype for function 'tdx_vcpu_reset' [-Wmissing-prototypes]
   void tdx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) {}
        ^
   arch/x86/kvm/vmx/tdx_stubs.c:12:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void tdx_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event) {}
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:14:5: warning: no previous prototype for function 'tdx_dev_ioctl' [-Wmissing-prototypes]
   int tdx_dev_ioctl(void __user *argp) { return -EOPNOTSUPP; }
       ^
   arch/x86/kvm/vmx/tdx_stubs.c:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tdx_dev_ioctl(void __user *argp) { return -EOPNOTSUPP; }
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:15:5: warning: no previous prototype for function 'tdx_vm_ioctl' [-Wmissing-prototypes]
   int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; }
       ^
   arch/x86/kvm/vmx/tdx_stubs.c:15:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; }
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:16:72: error: use of undeclared identifier 'ENOPNOTSUPP'
   int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp) { return -ENOPNOTSUPP; }
                                                                          ^
>> arch/x86/kvm/vmx/tdx_stubs.c:16:5: warning: no previous prototype for function 'tdx_vcpu_ioctl' [-Wmissing-prototypes]
   int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp) { return -ENOPNOTSUPP; }
       ^
   arch/x86/kvm/vmx/tdx_stubs.c:16:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp) { return -ENOPNOTSUPP; }
   ^
   static 
   10 warnings and 1 error generated.


vim +/tdx_vcpu_ioctl +16 arch/x86/kvm/vmx/tdx_stubs.c

    13	
    14	int tdx_dev_ioctl(void __user *argp) { return -EOPNOTSUPP; }
    15	int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; }
  > 16	int tdx_vcpu_ioctl(struct kvm_vcpu *vcpu, void __user *argp) { return -ENOPNOTSUPP; }

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