linux-kernel - [intel-tdx:kvm-upstream 79/152] arch/x86/kvm/vmx/tdx_stubs.c:11:5: warning: no previous prototype for function 'tdx_vm

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Date:   Fri, 17 Dec 2021 02:21:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Isaku Yamahata <isaku.yamahata@...el.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [intel-tdx:kvm-upstream 79/152] arch/x86/kvm/vmx/tdx_stubs.c:11:5:
 warning: no previous prototype for function 'tdx_vm_ioctl'

tree:   https://github.com/intel/tdx.git kvm-upstream
head:   bdfe06c17daab60c196ff80c1d98467a1d3734fa
commit: aa43996cce77132edb090ca84f3f6a72e359b55c [79/152] KVM: TDX: initialize VM with TDX specific parameters
config: x86_64-randconfig-a013-20211216 (https://download.01.org/0day-ci/archive/20211217/202112170255.KUhEZLw2-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/aa43996cce77132edb090ca84f3f6a72e359b55c
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream
        git checkout aa43996cce77132edb090ca84f3f6a72e359b55c
        # 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_dev_ioctl' [-Wmissing-prototypes]
   int tdx_dev_ioctl(void __user *argp) { 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_dev_ioctl(void __user *argp) { return -EOPNOTSUPP; }
   ^
   static 
>> arch/x86/kvm/vmx/tdx_stubs.c:11:5: 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:11:1: 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 
   6 warnings generated.


vim +/tdx_vm_ioctl +11 arch/x86/kvm/vmx/tdx_stubs.c

     9	
    10	int tdx_dev_ioctl(void __user *argp) { return -EOPNOTSUPP; }
  > 11	int tdx_vm_ioctl(struct kvm *kvm, void __user *argp) { return -EOPNOTSUPP; }

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