[rcu:dev.2021.08.25a 99/115] kernel/time/hrtimer.c:1478:7: warning: no previous prototype for function '__run_hrtimer_get_debug'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.08.25a
head:   2ba1d046d9bc5b4496027d120e3ddcdfbb2fe9f4
commit: b5d3ff1ac4a5c2cad4fe4c253029971886ff7fcf [99/115] EXP cpu: Print out last hrtimer handler
config: hexagon-randconfig-r045-20210903 (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=b5d3ff1ac4a5c2cad4fe4c253029971886ff7fcf
        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 b5d3ff1ac4a5c2cad4fe4c253029971886ff7fcf
        # 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 >>):

   kernel/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_REALTIME]        = HRTIMER_BASE_REALTIME,
                                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_MONOTONIC]       = HRTIMER_BASE_MONOTONIC,
                                     ^~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_BOOTTIME]        = HRTIMER_BASE_BOOTTIME,
                                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [CLOCK_TAI]             = HRTIMER_BASE_TAI,
                                     ^~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:118:27: note: previous initialization is here
           [0 ... MAX_CLOCKS - 1]  = HRTIMER_MAX_CLOCK_BASES,
                                     ^~~~~~~~~~~~~~~~~~~~~~~

quoted

kernel/time/hrtimer.c:1478:7: warning: no previous prototype for function '__run_hrtimer_get_debug' [-Wmissing-prototypes]

   void *__run_hrtimer_get_debug(int cpu)
         ^
   kernel/time/hrtimer.c:1478:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void *__run_hrtimer_get_debug(int cpu)
   ^
   static 
   kernel/time/hrtimer.c:276:20: warning: unused function 'is_migration_base' [-Wunused-function]
   static inline bool is_migration_base(struct hrtimer_clock_base *base)
                      ^
   kernel/time/hrtimer.c:650:19: warning: unused function 'hrtimer_hres_active' [-Wunused-function]
   static inline int hrtimer_hres_active(void)
                     ^
   kernel/time/hrtimer.c:1755:20: warning: unused function '__hrtimer_peek_ahead_timers' [-Wunused-function]
   static inline void __hrtimer_peek_ahead_timers(void) { }
                      ^
   8 warnings generated.


vim +/__run_hrtimer_get_debug +1478 kernel/time/hrtimer.c

  1477	

1478	void *__run_hrtimer_get_debug(int cpu)

  1479	{
  1480		return READ_ONCE(per_cpu(__run_hrtimer_fn, cpu));
  1481	}
  1482	

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