[zen:7.2/prjc 648/767] kernel/sched/alt_core.c:1979:19: warning: stack frame size (2104) exceeds limit (2048) in 'select_task_rq'

[zen:7.2/prjc 648/767] kernel/sched/alt_core.c:1979:19: warning: stack frame size (2104) exceeds limit (2048) in 'select_task_rq'

[kernel test robot]

tree:   https://github.com/zen-kernel/zen-kernel 7.2/prjc
head:   b93a6c25160bf4f198c279466dfabfb399f5d973
commit: ca8e0fde64fcfaf8691f1aa16d875770a5896ca5 [648/767] sched/alt: [Sync] dcb7416212e6 block: invalidate cached plug timestamp after task switch
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20260903/202609031352.hqUoMi0K-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/20260903/202609031352.hqUoMi0K-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/202609031352.hqUoMi0K-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/sched/alt_core.c:1979:19: warning: stack frame size (2104) exceeds limit (2048) in 'select_task_rq' [-Wframe-larger-than]
    1979 | static inline int select_task_rq(struct task_struct *p)
         |                   ^
>> kernel/sched/alt_core.c:4450:20: warning: stack frame size (2224) exceeds limit (2048) in 'prio_balance' [-Wframe-larger-than]
    4450 | static inline void prio_balance(struct rq *rq, const int cpu)
         |                    ^
   2 warnings generated.


vim +/select_task_rq +1979 kernel/sched/alt_core.c

d61ec5fb1be3213 Alfred Chen 2024-04-24  1978  
ff5c45dfa194c44 Alfred Chen 2021-05-24 @1979  static inline int select_task_rq(struct task_struct *p)
2f7ec82370cbb70 Alfred Chen 2019-08-19  1980  {
ca82bd6ba136130 Alfred Chen 2022-12-21  1981  	cpumask_t allow_mask, mask;
2f7ec82370cbb70 Alfred Chen 2019-08-19  1982  
ca82bd6ba136130 Alfred Chen 2022-12-21  1983  	if (unlikely(!cpumask_and(&allow_mask, p->cpus_ptr, cpu_active_mask)))
2f7ec82370cbb70 Alfred Chen 2019-08-19  1984  		return select_fallback_rq(task_cpu(p), p);
2f7ec82370cbb70 Alfred Chen 2019-08-19  1985  
1cb8e7e744b4a93 Alfred Chen 2025-08-28  1986  	if (static_call(sched_idle_select_func)(&mask, &allow_mask, sched_idle_mask)	||
081f001d0ed9543 Alfred Chen 2024-01-31  1987  	    preempt_mask_check(&mask, &allow_mask, task_sched_prio(p)))
ca82bd6ba136130 Alfred Chen 2022-12-21  1988  		return best_mask_cpu(task_cpu(p), &mask);
2f7ec82370cbb70 Alfred Chen 2019-08-19  1989  
ca82bd6ba136130 Alfred Chen 2022-12-21  1990  	return best_mask_cpu(task_cpu(p), &allow_mask);
2f7ec82370cbb70 Alfred Chen 2019-08-19  1991  }
2f7ec82370cbb70 Alfred Chen 2019-08-19  1992  

:::::: The code at line 1979 was first introduced by commit
:::::: ff5c45dfa194c44ec3b146644154ca07a35eef2a sched/pds: Fix unexpected larger delta in task_sched_prio_normal()

:::::: TO: Alfred Chen <cchalpha@gmail.com>
:::::: CC: Alfred Chen <cchalpha@gmail.com>

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