[android-common:android12-5.10-2021-09 1943/10848] kernel/sched/core.c:6995:5: warning: no previous prototype for function '_sched_cpu_deactivate'

[android-common:android12-5.10-2021-09 1943/10848] kernel/sched/core.c:6995:5: warning: no previous prototype for function '_sched_cpu_deactivate'

[kernel test robot]

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Hi Vincent,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android12-5.10-2021-09
head:   ece338aaa6b4bdf1c505c64f6b391e5cfabbfee5
commit: 683010f555d804c2b9b01d327767755fa78a3ce5 [1943/10848] ANDROID: cpu/hotplug: add pause/resume_cpus interface
config: x86_64-randconfig-r033-20210928 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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
        git remote add android-common https://android.googlesource.com/kernel/common
        git fetch --no-tags android-common android12-5.10-2021-09
        git checkout 683010f555d804c2b9b01d327767755fa78a3ce5
        # 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 >>):

   kernel/sched/core.c:2410:6: warning: no previous prototype for function 'sched_set_stop_task' [-Wmissing-prototypes]
   void sched_set_stop_task(int cpu, struct task_struct *stop)
        ^
   kernel/sched/core.c:2410:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_set_stop_task(int cpu, struct task_struct *stop)
   ^
   static 
   kernel/sched/core.c:4690:35: warning: no previous prototype for function 'schedule_user' [-Wmissing-prototypes]
   asmlinkage __visible void __sched schedule_user(void)
                                     ^
   kernel/sched/core.c:4690:22: note: declare 'static' if the function is not intended to be used outside of this translation unit
   asmlinkage __visible void __sched schedule_user(void)
                        ^
                        static 
>> kernel/sched/core.c:6995:5: warning: no previous prototype for function '_sched_cpu_deactivate' [-Wmissing-prototypes]
   int _sched_cpu_deactivate(unsigned int cpu)
       ^
   kernel/sched/core.c:6995:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int _sched_cpu_deactivate(unsigned int cpu)
   ^
   static 
   kernel/sched/core.c:330:1: warning: unused function 'rq_csd_init' [-Wunused-function]
   rq_csd_init(struct rq *rq, call_single_data_t *csd, smp_call_func_t func)
   ^
   4 warnings generated.


vim +/_sched_cpu_deactivate +6995 kernel/sched/core.c

  6994	
> 6995	int _sched_cpu_deactivate(unsigned int cpu)
  6996	{
  6997		int ret;
  6998	
  6999		set_cpu_active(cpu, false);
  7000	

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

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