[android-common:android-4.19-stable 11009/30000] kernel/sched/stubs.c:8:5: warning: no previous prototype for function 'sched_isolate_cpu'

[android-common:android-4.19-stable 11009/30000] kernel/sched/stubs.c:8:5: warning: no previous prototype for function 'sched_isolate_cpu'

[kernel test robot]

Hi Quentin,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android-4.19-stable
head:   a8bf86a0e0fa05070897a210d706d5c4d83c26ac
commit: eead51495c8760858c32d9ad0332ffc94397aa82 [11009/30000] ANDROID: GKI: sched: stub sched_isolate symbols
config: x86_64-buildonly-randconfig-004-20241212 (https://download.01.org/0day-ci/archive/20241212/202412121906.nSQrei7t-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241212/202412121906.nSQrei7t-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412121906.nSQrei7t-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/sched/stubs.c:8:5: warning: no previous prototype for function 'sched_isolate_cpu' [-Wmissing-prototypes]
       8 | int sched_isolate_cpu(int cpu)
         |     ^
   kernel/sched/stubs.c:8:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
       8 | int sched_isolate_cpu(int cpu)
         | ^
         | static 
>> kernel/sched/stubs.c:14:5: warning: no previous prototype for function 'sched_unisolate_cpu_unlocked' [-Wmissing-prototypes]
      14 | int sched_unisolate_cpu_unlocked(int cpu)
         |     ^
   kernel/sched/stubs.c:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      14 | int sched_unisolate_cpu_unlocked(int cpu)
         | ^
         | static 
>> kernel/sched/stubs.c:20:5: warning: no previous prototype for function 'sched_unisolate_cpu' [-Wmissing-prototypes]
      20 | int sched_unisolate_cpu(int cpu)
         |     ^
   kernel/sched/stubs.c:20:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      20 | int sched_unisolate_cpu(int cpu)
         | ^
         | static 
>> kernel/sched/stubs.c:26:5: warning: no previous prototype for function 'set_task_boost' [-Wmissing-prototypes]
      26 | int set_task_boost(int boost, u64 period)
         |     ^
   kernel/sched/stubs.c:26:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      26 | int set_task_boost(int boost, u64 period)
         | ^
         | static 
   4 warnings generated.


vim +/sched_isolate_cpu +8 kernel/sched/stubs.c

     7	
   > 8	int sched_isolate_cpu(int cpu)
     9	{
    10		return -EINVAL;
    11	}
    12	EXPORT_SYMBOL_GPL(sched_isolate_cpu);
    13	
  > 14	int sched_unisolate_cpu_unlocked(int cpu)
    15	{
    16		return -EINVAL;
    17	}
    18	EXPORT_SYMBOL_GPL(sched_unisolate_cpu_unlocked);
    19	
  > 20	int sched_unisolate_cpu(int cpu)
    21	{
    22		return -EINVAL;
    23	}
    24	EXPORT_SYMBOL_GPL(sched_unisolate_cpu);
    25	
  > 26	int set_task_boost(int boost, u64 period)

-- 
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https://github.com/intel/lkp-tests/wiki