[zen:7.2/prjc 118/118] kernel/sched/alt_core.c:5356:6: warning: no previous prototype for function 'rt_mutex_futex_pre_schedule'

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

tree:   https://github.com/zen-kernel/zen-kernel 7.2/prjc
head:   ecdb5900a34a8291a8457c0e29cca911c55dbf67
commit: ecdb5900a34a8291a8457c0e29cca911c55dbf67 [118/118] sched/alt: [Sync] b715872ef0cc futex: Provide rt_mutex_.*_schedule() equivalents for futex scheduling
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20260915/202609151610.HZbfQR10-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260915/202609151610.HZbfQR10-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/202609151610.HZbfQR10-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/sched/alt_core.c:5356:6: warning: no previous prototype for function 'rt_mutex_futex_pre_schedule' [-Wmissing-prototypes]
    5356 | void rt_mutex_futex_pre_schedule(void)
         |      ^
   kernel/sched/alt_core.c:5356:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    5356 | void rt_mutex_futex_pre_schedule(void)
         | ^
         | static 
>> kernel/sched/alt_core.c:5375:6: warning: no previous prototype for function 'rt_mutex_futex_post_schedule' [-Wmissing-prototypes]
    5375 | void rt_mutex_futex_post_schedule(void)
         |      ^
   kernel/sched/alt_core.c:5375:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    5375 | void rt_mutex_futex_post_schedule(void)
         | ^
         | static 
   kernel/sched/alt_core.c:2051:19: warning: stack frame size (2176) exceeds limit (2048) in 'select_task_rq' [-Wframe-larger-than]
    2051 | static inline int select_task_rq(struct task_struct *p, int wake_flags)
         |                   ^
   kernel/sched/alt_core.c:4703:20: warning: stack frame size (2232) exceeds limit (2048) in 'prio_balance' [-Wframe-larger-than]
    4703 | static inline void prio_balance(struct rq *rq, const int cpu)
         |                    ^
   4 warnings generated.


vim +/rt_mutex_futex_pre_schedule +5356 kernel/sched/alt_core.c

  5351	
  5352	/*
  5353	 * Used within the futex syscall context, skips sched_submit_work() because none
  5354	 * its work will be done. Asserts ensure that it is indeed the case.
  5355	 */
> 5356	void rt_mutex_futex_pre_schedule(void)
  5357	{
  5358		lockdep_assert(!(current->flags & (PF_WQ_WORKER | PF_IO_WORKER)));
  5359		lockdep_assert(!current->plug);
  5360		lockdep_assert(!fetch_and_set(current->sched_rt_mutex, 1));
  5361	}
  5362	
  5363	void rt_mutex_schedule(void)
  5364	{
  5365		lockdep_assert(current->sched_rt_mutex);
  5366		__schedule_loop(SM_NONE);
  5367	}
  5368	
  5369	void rt_mutex_post_schedule(void)
  5370	{
  5371		sched_update_worker(current);
  5372		lockdep_assert(fetch_and_set(current->sched_rt_mutex, 0));
  5373	}
  5374	
> 5375	void rt_mutex_futex_post_schedule(void)
  5376	{
  5377		lockdep_assert(fetch_and_set(current->sched_rt_mutex, 0));
  5378	}
  5379	

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