linux-kernel - [intel-tdx:kvm-upstream-workaround 111/144] arch/x86/kvm/vmx/tdx_stubs.c:14:6: warning: no previous prototype for function 'tdx_vm

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Date:   Sat, 12 Feb 2022 01:58:53 +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-workaround 111/144]
 arch/x86/kvm/vmx/tdx_stubs.c:14:6: warning: no previous prototype for
 function 'tdx_vm_teardown'

tree:   https://github.com/intel/tdx.git kvm-upstream-workaround
head:   8dfa492341b8e8ba1c9dc534dd55565adc1b0ac0
commit: 1942310bc36276289fa54bb8d077c394078c4b15 [111/144] KVM: TDX: Add methods to ignore accesses to CPU state
config: x86_64-randconfig-a014 (https://download.01.org/0day-ci/archive/20220211/202202112353.bT0JdIv7-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project f6685f774697c85d6a352dcea013f46a99f9fe31)
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/1942310bc36276289fa54bb8d077c394078c4b15
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream-workaround
        git checkout 1942310bc36276289fa54bb8d077c394078c4b15
        # 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:14:6: warning: no previous prototype for function 'tdx_vm_teardown' [-Wmissing-prototypes]
   void tdx_vm_teardown(struct kvm *kvm) {}
        ^
   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
   void tdx_vm_teardown(struct kvm *kvm) {}
   ^
   static 
   arch/x86/kvm/vmx/tdx_stubs.c:38:5: warning: no previous prototype for function 'tdx_deliver_posted_interrupt' [-Wmissing-prototypes]
   int tdx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { return 0; }
       ^
   arch/x86/kvm/vmx/tdx_stubs.c:38:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int tdx_deliver_posted_interrupt(struct kvm_vcpu *vcpu, int vector) { return 0; }
   ^
   static 
   2 warnings generated.


vim +/tdx_vm_teardown +14 arch/x86/kvm/vmx/tdx_stubs.c

    12	
    13	int tdx_vm_init(struct kvm *kvm) { return -EOPNOTSUPP; }
  > 14	void tdx_vm_teardown(struct kvm *kvm) {}
    15	

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