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* [zen:5.14/prjc 199/213] kernel/sched/alt_core.c:6229:6: warning: no previous prototype for function 'idle_task_exit'
@ 2021-09-19 18:18 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-09-19 18:18 UTC (permalink / raw)
  To: kbuild-all

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tree:   https://github.com/zen-kernel/zen-kernel 5.14/prjc
head:   4fafc0599dcf6ced73c595d6a911179b8b0a9e9e
commit: 8e79ff69bdee272975f92e45e8b4ecf0690b636e [199/213] sched/alt: [Sync] 2f064a59a11f sched: Change task_struct::state
config: x86_64-randconfig-a013-20210919 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f)
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
        # https://github.com/zen-kernel/zen-kernel/commit/8e79ff69bdee272975f92e45e8b4ecf0690b636e
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 5.14/prjc
        git checkout 8e79ff69bdee272975f92e45e8b4ecf0690b636e
        # 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/alt_core.c:830:6: warning: no previous prototype for function 'resched_curr' [-Wmissing-prototypes]
   void resched_curr(struct rq *rq)
        ^
   kernel/sched/alt_core.c:830:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void resched_curr(struct rq *rq)
   ^
   static 
   kernel/sched/alt_core.c:853:6: warning: no previous prototype for function 'resched_cpu' [-Wmissing-prototypes]
   void resched_cpu(int cpu)
        ^
   kernel/sched/alt_core.c:853:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void resched_cpu(int cpu)
   ^
   static 
   kernel/sched/alt_core.c:868:6: warning: no previous prototype for function 'select_nohz_load_balancer' [-Wmissing-prototypes]
   void select_nohz_load_balancer(int stop_tick) {}
        ^
   kernel/sched/alt_core.c:868:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void select_nohz_load_balancer(int stop_tick) {}
   ^
   static 
   kernel/sched/alt_core.c:870:6: warning: no previous prototype for function 'set_cpu_sd_state_idle' [-Wmissing-prototypes]
   void set_cpu_sd_state_idle(void) {}
        ^
   kernel/sched/alt_core.c:870:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void set_cpu_sd_state_idle(void) {}
   ^
   static 
   kernel/sched/alt_core.c:1744:6: 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/alt_core.c:1744:1: 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/alt_core.c:6229:6: warning: no previous prototype for function 'idle_task_exit' [-Wmissing-prototypes]
   void idle_task_exit(void)
        ^
   kernel/sched/alt_core.c:6229:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void idle_task_exit(void)
   ^
   static 
>> kernel/sched/alt_core.c:6439:5: warning: no previous prototype for function 'sched_cpu_activate' [-Wmissing-prototypes]
   int sched_cpu_activate(unsigned int cpu)
       ^
   kernel/sched/alt_core.c:6439:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_cpu_activate(unsigned int cpu)
   ^
   static 
>> kernel/sched/alt_core.c:6478:5: warning: no previous prototype for function 'sched_cpu_deactivate' [-Wmissing-prototypes]
   int sched_cpu_deactivate(unsigned int cpu)
       ^
   kernel/sched/alt_core.c:6478:1: 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/alt_core.c:6542:5: warning: no previous prototype for function 'sched_cpu_starting' [-Wmissing-prototypes]
   int sched_cpu_starting(unsigned int cpu)
       ^
   kernel/sched/alt_core.c:6542:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_cpu_starting(unsigned int cpu)
   ^
   static 
>> kernel/sched/alt_core.c:6562:5: warning: no previous prototype for function 'sched_cpu_wait_empty' [-Wmissing-prototypes]
   int sched_cpu_wait_empty(unsigned int cpu)
       ^
   kernel/sched/alt_core.c:6562:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_cpu_wait_empty(unsigned int cpu)
   ^
   static 
>> kernel/sched/alt_core.c:6604:5: warning: no previous prototype for function 'sched_cpu_dying' [-Wmissing-prototypes]
   int sched_cpu_dying(unsigned int cpu)
       ^
   kernel/sched/alt_core.c:6604:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_cpu_dying(unsigned int cpu)
   ^
   static 
   kernel/sched/alt_core.c:6851:16: warning: variable 'preempt_disable_ip' set but not used [-Wunused-but-set-variable]
           unsigned long preempt_disable_ip;
                         ^
   kernel/sched/alt_core.c:7046:20: warning: no previous prototype for function 'sched_create_group' [-Wmissing-prototypes]
   struct task_group *sched_create_group(struct task_group *parent)
                      ^
   kernel/sched/alt_core.c:7046:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct task_group *sched_create_group(struct task_group *parent)
   ^
   static 
   kernel/sched/alt_core.c:7057:6: warning: no previous prototype for function 'sched_online_group' [-Wmissing-prototypes]
   void sched_online_group(struct task_group *tg, struct task_group *parent)
        ^
   kernel/sched/alt_core.c:7057:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_online_group(struct task_group *tg, struct task_group *parent)
   ^
   static 
   kernel/sched/alt_core.c:7068:6: warning: no previous prototype for function 'sched_destroy_group' [-Wmissing-prototypes]
   void sched_destroy_group(struct task_group *tg)
        ^
   kernel/sched/alt_core.c:7068:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_destroy_group(struct task_group *tg)
   ^
   static 
   kernel/sched/alt_core.c:7074:6: warning: no previous prototype for function 'sched_offline_group' [-Wmissing-prototypes]
   void sched_offline_group(struct task_group *tg)
        ^
   kernel/sched/alt_core.c:7074:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_offline_group(struct task_group *tg)
   ^
   static 
   kernel/sched/alt_core.c:7144:5: warning: no previous prototype for function 'sched_group_set_shares' [-Wmissing-prototypes]
   int sched_group_set_shares(struct task_group *tg, unsigned long shares)
       ^
   kernel/sched/alt_core.c:7144:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_group_set_shares(struct task_group *tg, unsigned long shares)
   ^
   static 
   kernel/sched/alt_core.c:7213:20: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           .legacy_cftypes = cpu_legacy_files,
                             ^~~~~~~~~~~~~~~~
   kernel/sched/alt_core.c:7212:20: note: previous initialization is here
           .legacy_cftypes = cpu_files,
                             ^~~~~~~~~
   kernel/sched/alt_core.c:1100:19: warning: unused function 'hrtick_enabled' [-Wunused-function]
   static inline int hrtick_enabled(struct rq *rq)
                     ^
>> kernel/sched/alt_core.c:1725:19: warning: stack frame size (2080) exceeds limit (2048) in function 'select_task_rq' [-Wframe-larger-than]
   static inline int select_task_rq(struct task_struct *p)
                     ^
   20 warnings generated.


vim +/idle_task_exit +6229 kernel/sched/alt_core.c

f746b5817d3274 Alfred Chen 2019-08-19  6223  
f746b5817d3274 Alfred Chen 2019-08-19  6224  #ifdef CONFIG_HOTPLUG_CPU
f746b5817d3274 Alfred Chen 2019-08-19  6225  /*
f746b5817d3274 Alfred Chen 2019-08-19  6226   * Ensures that the idle task is using init_mm right before its CPU goes
f746b5817d3274 Alfred Chen 2019-08-19  6227   * offline.
f746b5817d3274 Alfred Chen 2019-08-19  6228   */
f746b5817d3274 Alfred Chen 2019-08-19 @6229  void idle_task_exit(void)
f746b5817d3274 Alfred Chen 2019-08-19  6230  {
f746b5817d3274 Alfred Chen 2019-08-19  6231  	struct mm_struct *mm = current->active_mm;
f746b5817d3274 Alfred Chen 2019-08-19  6232  
f746b5817d3274 Alfred Chen 2019-08-19  6233  	BUG_ON(current != this_rq()->idle);
f746b5817d3274 Alfred Chen 2019-08-19  6234  
f746b5817d3274 Alfred Chen 2019-08-19  6235  	if (mm != &init_mm) {
f746b5817d3274 Alfred Chen 2019-08-19  6236  		switch_mm(mm, &init_mm, current);
f746b5817d3274 Alfred Chen 2019-08-19  6237  		finish_arch_post_lock_switch();
f746b5817d3274 Alfred Chen 2019-08-19  6238  	}
f746b5817d3274 Alfred Chen 2019-08-19  6239  
f746b5817d3274 Alfred Chen 2019-08-19  6240  	/* finish_cpu(), as ran on the BP, will clean up the active_mm state */
f746b5817d3274 Alfred Chen 2019-08-19  6241  }
f746b5817d3274 Alfred Chen 2019-08-19  6242  

:::::: The code at line 6229 was first introduced by commit
:::::: f746b5817d3274fa4f458f87f6b452e7304b1d64 Project C v5.7.5-r2

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

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

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2021-09-19 18:18 [zen:5.14/prjc 199/213] kernel/sched/alt_core.c:6229:6: warning: no previous prototype for function 'idle_task_exit' kernel test robot

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