[qais-yousef:pelt-halflife-sysctl 11/12] kernel/sched/pelt.c:480:5: warning: no previous prototype for function 'update_pelt_halflife'

[kernel test robot <lkp@intel.com>]

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tree:   https://github.com/qais-yousef/linux pelt-halflife-sysctl
head:   a84c86d0d71b004bf3a860e817bd36822d4eb698
commit: a1d3ac8f265d561147c8cfb2cc0a3c3e9b864a39 [11/12] sched/pelt: add new sysctl to modify halflife
config: arm64-randconfig-r013-20210130 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 275c6af7d7f1ed63a03d05b4484413e447133269)
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://github.com/qais-yousef/linux/commit/a1d3ac8f265d561147c8cfb2cc0a3c3e9b864a39
        git remote add qais-yousef https://github.com/qais-yousef/linux
        git fetch --no-tags qais-yousef pelt-halflife-sysctl
        git checkout a1d3ac8f265d561147c8cfb2cc0a3c3e9b864a39
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

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 >>):

>> kernel/sched/pelt.c:480:5: warning: no previous prototype for function 'update_pelt_halflife' [-Wmissing-prototypes]
   int update_pelt_halflife(void *data)
       ^
   kernel/sched/pelt.c:480:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int update_pelt_halflife(void *data)
   ^
   static 
   1 warning generated.


vim +/update_pelt_halflife +480 kernel/sched/pelt.c

   479	
 > 480	int update_pelt_halflife(void *data)
   481	{
   482		switch (sysctl_sched_pelt_halflife) {
   483		case 32:
   484			LOAD_AVG_PERIOD = LOAD_AVG_PERIOD_32;
   485			LOAD_AVG_MAX = LOAD_AVG_MAX_32;
   486			break;
   487		case 16:
   488			LOAD_AVG_PERIOD = LOAD_AVG_PERIOD_16;
   489			LOAD_AVG_MAX = LOAD_AVG_MAX_16;
   490			break;
   491		case 8:
   492			LOAD_AVG_PERIOD = LOAD_AVG_PERIOD_8;
   493			LOAD_AVG_MAX = LOAD_AVG_MAX_8;
   494			break;
   495		default:
   496			return -EINVAL;
   497		}
   498	
   499		return 0;
   500	}
   501	

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

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