[rcu:dev.2021.08.25a 114/115] kernel/time/tick-oneshot.c:22:7: warning: no previous prototype for function 'tick_program_event_get_debug'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.08.25a
head:   2ba1d046d9bc5b4496027d120e3ddcdfbb2fe9f4
commit: 79b77a560631f5a34c7dd062f1312430bc092f44 [114/115] EXP cpu: Track path through tick_program_event()
config: hexagon-randconfig-r041-20210903 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c9948e9254fbb6ea00f66c7b4542311d21e060be)
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://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=79b77a560631f5a34c7dd062f1312430bc092f44
        git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
        git fetch --no-tags rcu dev.2021.08.25a
        git checkout 79b77a560631f5a34c7dd062f1312430bc092f44
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All warnings (new ones prefixed by >>):

quoted

kernel/time/tick-oneshot.c:22:7: warning: no previous prototype for function 'tick_program_event_get_debug' [-Wmissing-prototypes]

   char *tick_program_event_get_debug(int cpu)
         ^
   kernel/time/tick-oneshot.c:22:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   char *tick_program_event_get_debug(int cpu)
   ^
   static 
   1 warning generated.


vim +/tick_program_event_get_debug +22 kernel/time/tick-oneshot.c

    21	
  > 22	char *tick_program_event_get_debug(int cpu)
    23	{
    24		return READ_ONCE(per_cpu(tick_program_event_codepath, cpu));
    25	}
    26	

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