[android-common:android14-5.15 1/2] kernel/sched/core.c:4854:6: error: no previous prototype for function '__balance_callbacks'

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

tree:   https://android.googlesource.com/kernel/common android14-5.15
head:   abea1cb16e43c1dbbcad5b826fe6952c343f59fb
commit: fdaddcab764a1219457d72273a96e2afb30b8824 [1/2] ANDROID: GKI: vendor code needs __balance_callbacks access
config: x86_64-sof-customedconfig-compile-test-defconfig (https://download.01.org/0day-ci/archive/20231218/202312181334.JDngriy0-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231218/202312181334.JDngriy0-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/202312181334.JDngriy0-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/sched/core.c:13:
   kernel/sched/sched.h:1770:15: error: cast from 'void (*)(struct rq *)' to 'void (*)(struct callback_head *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
           head->func = (void (*)(struct callback_head *))func;
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c:3543:6: error: no previous prototype for function 'sched_set_stop_task' [-Werror,-Wmissing-prototypes]
   void sched_set_stop_task(int cpu, struct task_struct *stop)
        ^
   kernel/sched/core.c:3543:1: 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:4796:10: error: cast from 'void (*)(struct callback_head *)' to 'void (*)(struct rq *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
                   func = (void (*)(struct rq *))head->func;
                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c:4820:10: error: cast from 'void (*)(struct rq *)' to 'void (*)(struct callback_head *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
           .func = (void (*)(struct callback_head *))balance_push,
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/sched/core.c:4854:6: error: no previous prototype for function '__balance_callbacks' [-Werror,-Wmissing-prototypes]
   void __balance_callbacks(struct rq *rq)
        ^
   kernel/sched/core.c:4854:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __balance_callbacks(struct rq *rq)
   ^
   static 
   5 errors generated.


vim +/__balance_callbacks +4854 kernel/sched/core.c

  4853	
> 4854	void __balance_callbacks(struct rq *rq)
  4855	{
  4856		do_balance_callbacks(rq, __splice_balance_callbacks(rq, false));
  4857	}
  4858	EXPORT_SYMBOL_GPL(__balance_callbacks);
  4859	

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