linux-kernel - arch/arm64/kvm/va_layout.c:292:6: warning: no previous prototype for function 'kvm_compute_final_ctr

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Date:   Thu, 10 Mar 2022 22:42:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Quentin Perret <qperret@...gle.com>
Subject: arch/arm64/kvm/va_layout.c:292:6: warning: no previous prototype for
 function 'kvm_compute_final_ctr_el0'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1db333d9a51f3459fba1bcaa564d95befe79f0b3
commit: 755db23420a1ce4b740186543432983e9bbe713e KVM: arm64: Generate final CTR_EL0 value when running in Protected mode
date:   12 months ago
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220310/202203102230.x3TDH4ku-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6)
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/torvalds/linux.git/commit/?id=755db23420a1ce4b740186543432983e9bbe713e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 755db23420a1ce4b740186543432983e9bbe713e
        # 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=arm64 SHELL=/bin/bash arch/arm64/kernel/ arch/arm64/kvm/ drivers/gpu/drm/tegra/ drivers/usb/host/ kernel/debug/kdb/

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/va_layout.c:188:6: warning: no previous prototype for function 'kvm_patch_vector_branch' [-Wmissing-prototypes]
   void kvm_patch_vector_branch(struct alt_instr *alt,
        ^
   arch/arm64/kvm/va_layout.c:188:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void kvm_patch_vector_branch(struct alt_instr *alt,
   ^
   static 
   arch/arm64/kvm/va_layout.c:286:6: warning: no previous prototype for function 'kvm_get_kimage_voffset' [-Wmissing-prototypes]
   void kvm_get_kimage_voffset(struct alt_instr *alt,
        ^
   arch/arm64/kvm/va_layout.c:286:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void kvm_get_kimage_voffset(struct alt_instr *alt,
   ^
   static 
>> arch/arm64/kvm/va_layout.c:292:6: warning: no previous prototype for function 'kvm_compute_final_ctr_el0' [-Wmissing-prototypes]
   void kvm_compute_final_ctr_el0(struct alt_instr *alt,
        ^
   arch/arm64/kvm/va_layout.c:292:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void kvm_compute_final_ctr_el0(struct alt_instr *alt,
   ^
   static 
   3 warnings generated.


vim +/kvm_compute_final_ctr_el0 +292 arch/arm64/kvm/va_layout.c

   291	
 > 292	void kvm_compute_final_ctr_el0(struct alt_instr *alt,

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