[ak:lto-5.13-1-wip 36/36] arch/x86/kernel/paravirt.c:127:15: warning: no previous prototype for function 'native_steal_clock'

From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [ak:lto-5.13-1-wip 36/36] arch/x86/kernel/paravirt.c:127:15: warning: no previous prototype for function 'native_steal_clock'
Date: Mon, 26 Apr 2021 11:45:03 +0800	[thread overview]
Message-ID: <202104261156.UkMxlZRd-lkp@intel.com> (raw)

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git lto-5.13-1-wip
head:   45fc24254df69291f9ebd597bc747df2eb61ee3a
commit: 45fc24254df69291f9ebd597bc747df2eb61ee3a [36/36] x86/paravirt/lto: Export native_steal_clock
config: x86_64-randconfig-a002-20210426 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d941863de2becb3d8d2e00676fc7125974934c7f)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git/commit/?id=45fc24254df69291f9ebd597bc747df2eb61ee3a
        git remote add ak https://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc.git
        git fetch --no-tags ak lto-5.13-1-wip
        git checkout 45fc24254df69291f9ebd597bc747df2eb61ee3a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/paravirt.c:127:15: warning: no previous prototype for function 'native_steal_clock' [-Wmissing-prototypes]
   __visible u64 native_steal_clock(int cpu)
                 ^
   arch/x86/kernel/paravirt.c:127:11: note: declare 'static' if the function is not intended to be used outside of this translation unit
   __visible u64 native_steal_clock(int cpu)
             ^
             static 
   1 warning generated.

vim +/native_steal_clock +127 arch/x86/kernel/paravirt.c

   126	
 > 127	__visible u64 native_steal_clock(int cpu)
   128	{
   129		return 0;
   130	}
   131	

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

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