[ammarfaizi2-block:tglx/devel/hrtimer 11/11] kernel/time/hrtimer.c:1087:12: sparse: sparse: function 'hrtimer_forward_now' with external linkage has definition

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block tglx/devel/hrtimer
head:   9ad8708a7b7f585067bef93398ca52581ab4474c
commit: 9ad8708a7b7f585067bef93398ca52581ab4474c [11/11] hrtimer: Make hrtimer_forward() private to core timer code
config: i386-randconfig-s001-20211231 (https://download.01.org/0day-ci/archive/20220101/202201012226.XYB7q71g-lkp@xxxxxxxxx/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/ammarfaizi2/linux-block/commit/9ad8708a7b7f585067bef93398ca52581ab4474c
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block tglx/devel/hrtimer
        git checkout 9ad8708a7b7f585067bef93398ca52581ab4474c
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash kernel/time/

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


sparse warnings: (new ones prefixed by >>)
>> kernel/time/hrtimer.c:1087:12: sparse: sparse: function 'hrtimer_forward_now' with external linkage has definition

vim +/hrtimer_forward_now +1087 kernel/time/hrtimer.c

  1070	
  1071	/**
  1072	 * hrtimer_forward_now - forward the timer expiry so it expires after now
  1073	 * @timer:	hrtimer to forward
  1074	 * @interval:	the interval to forward
  1075	 *
  1076	 * Forward the timer expiry so it will expire after the current time
  1077	 * of the hrtimer clock base. Returns the number of overruns.
  1078	 *
  1079	 * Can be safely called from the callback function of @timer. If
  1080	 * called from other contexts @timer must neither be enqueued nor
  1081	 * running the callback and the caller needs to take care of
  1082	 * serialization.
  1083	 *
  1084	 * Note: This only updates the timer expiry value and does not requeue
  1085	 * the timer.
  1086	 */
> 1087	extern u64 hrtimer_forward_now(struct hrtimer *timer, ktime_t interval)
  1088	{
  1089		return hrtimer_forward(timer, timer->base->get_time(), interval);
  1090	}
  1091	EXPORT_SYMBOL_GPL(hrtimer_forward_now);
  1092	

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