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

[kernel test robot]

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: i386-tinyconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # 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
        make W=1 ARCH=i386 

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

All warnings (new ones prefixed by >>):

   kernel/time/hrtimer.c:120:21: warning: initialized field overwritten [-Woverride-init]
     120 |  [CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
         |                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:120:21: note: (near initialization for 'hrtimer_clock_to_base_table[0]')
   kernel/time/hrtimer.c:121:22: warning: initialized field overwritten [-Woverride-init]
     121 |  [CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
         |                      ^~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:121:22: note: (near initialization for 'hrtimer_clock_to_base_table[1]')
   kernel/time/hrtimer.c:122:21: warning: initialized field overwritten [-Woverride-init]
     122 |  [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
         |                     ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:122:21: note: (near initialization for 'hrtimer_clock_to_base_table[7]')
   kernel/time/hrtimer.c:123:17: warning: initialized field overwritten [-Woverride-init]
     123 |  [CLOCK_TAI]  = HRTIMER_BASE_TAI,
         |                 ^~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c:123:17: note: (near initialization for 'hrtimer_clock_to_base_table[11]')
>> kernel/time/hrtimer.c:1478:7: warning: no previous prototype for '__run_hrtimer_get_debug' [-Wmissing-prototypes]
    1478 | void *__run_hrtimer_get_debug(int cpu)
         |       ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/time/hrtimer.c: In function '__run_hrtimer':
   kernel/time/hrtimer.c:1507:7: warning: variable 'expires_in_hardirq' set but not used [-Wunused-but-set-variable]
    1507 |  bool expires_in_hardirq;
         |       ^~~~~~~~~~~~~~~~~~


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	

---
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Attachment: .config.gz
Description: application/gzip