Hi,

[auto build test ERROR on tip/timers/core]
[also build test ERROR on v4.7-rc6 next-20160708]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Nicolai-Stange/avoid-double-timer-interrupt-with-nohz-and-Intel-TSC/20160710-202914
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   arch/x86/kernel/tsc.c: In function 'tsc_refine_calibration_work':
>> arch/x86/kernel/tsc.c:1198:2: error: implicit declaration of function 'lapic_update_tsc_freq' [-Werror=implicit-function-declaration]
     lapic_update_tsc_freq();
     ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/lapic_update_tsc_freq +1198 arch/x86/kernel/tsc.c

  1192		tsc_khz = freq;
  1193		pr_info("Refined TSC clocksource calibration: %lu.%03lu MHz\n",
  1194			(unsigned long)tsc_khz / 1000,
  1195			(unsigned long)tsc_khz % 1000);
  1196	
  1197		/* Inform the TSC deadline clockevent devices about the recalibration */
> 1198		lapic_update_tsc_freq();
  1199	
  1200	out:
  1201		if (boot_cpu_has(X86_FEATURE_ART))

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