linux-kernel - [arm-perf:kvm/mm-hacking 20/22] arch/arm64/kvm/hyp/nvhe/hyp-main.c:40:6: warning: no previous prototype for function 'put_shadow

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Message-ID: <202110190647.KW99hQ3r-lkp@intel.com>
Date:   Tue, 19 Oct 2021 06:20:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Fuad Tabba <tabba@...gle.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Quentin Perret <qperret@...gle.com>
Subject: [arm-perf:kvm/mm-hacking 20/22]
 arch/arm64/kvm/hyp/nvhe/hyp-main.c:40:6: warning: no previous prototype for
 function 'put_shadow_vcpu'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git kvm/mm-hacking
head:   e5759e0ca29728e31bd3fd0137ec905eecb15bf9
commit: a77ba8a5f9ded36915ebab3e8bb3c75430c9ad92 [20/22] BACKPORT: KVM: arm64: Shadow table for KVM EL2 state
config: arm64-randconfig-r035-20211019 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d245f2e8597bfb52c34810a328d42b990e4af1a4)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/commit/?id=a77ba8a5f9ded36915ebab3e8bb3c75430c9ad92
        git remote add arm-perf https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git
        git fetch --no-tags arm-perf kvm/mm-hacking
        git checkout a77ba8a5f9ded36915ebab3e8bb3c75430c9ad92
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

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/arm64/kvm/hyp/nvhe/hyp-main.c:40:6: warning: no previous prototype for function 'put_shadow_vcpu' [-Wmissing-prototypes]
   void put_shadow_vcpu(struct kvm_vcpu *vcpu, int exit_code)
        ^
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:40:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void put_shadow_vcpu(struct kvm_vcpu *vcpu, int exit_code)
   ^
   static 
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:292:6: warning: no previous prototype for function 'handle_trap' [-Wmissing-prototypes]
   void handle_trap(struct kvm_cpu_context *host_ctxt)
        ^
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:292:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void handle_trap(struct kvm_cpu_context *host_ctxt)
   ^
   static 
   2 warnings generated.
--
>> arch/arm64/kvm/hyp/nvhe/pkvm.c:90:6: warning: no previous prototype for function 'clear_shadow_cache' [-Wmissing-prototypes]
   void clear_shadow_cache(void)
        ^
   arch/arm64/kvm/hyp/nvhe/pkvm.c:90:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void clear_shadow_cache(void)
   ^
   static 
   arch/arm64/kvm/hyp/nvhe/pkvm.c:329:8: error: implicit declaration of function 'check_host_memory_addr' [-Werror,-Wimplicit-function-declaration]
           ret = check_host_memory_addr((u64)kvm, sizeof(*kvm));
                 ^
   arch/arm64/kvm/hyp/nvhe/pkvm.c:404:15: error: implicit declaration of function 'check_host_memory_addr' [-Werror,-Wimplicit-function-declaration]
           if (unlikely(check_host_memory_addr((u64)kvm, sizeof(*kvm))))
                        ^
   arch/arm64/kvm/hyp/nvhe/pkvm.c:399:14: warning: unused variable 'shadow_kvm_pa' [-Wunused-variable]
           phys_addr_t shadow_kvm_pa;
                       ^
   2 warnings and 2 errors generated.


vim +/put_shadow_vcpu +40 arch/arm64/kvm/hyp/nvhe/hyp-main.c

    39	
  > 40	void put_shadow_vcpu(struct kvm_vcpu *vcpu, int exit_code)
    41	{
    42	}
    43	

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

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