tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   c275b7e889a24652acb26672d35202fefb42e9fd
commit: 303bf326f9c1f64d80f1943eaa5ac966f6096c7d [75/412] kernel/watchdog: move NMI function header declarations from watchdog.h to nmi.h
config: tile-tilegx_defconfig (attached as .config)
reproduce:
  wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
  chmod +x ~/bin/make.cross
  git checkout 303bf326f9c1f64d80f1943eaa5ac966f6096c7d
  # save the attached .config to linux build tree
  make.cross ARCH=tile 

All error/warnings (new ones prefixed by >>):

>> kernel/watchdog.c:654:6: error: redefinition of 'watchdog_nmi_enable_all'
   include/linux/nmi.h:34:20: note: previous definition of 'watchdog_nmi_enable_all' was here
>> kernel/watchdog.c:655:6: error: redefinition of 'watchdog_nmi_disable_all'
   include/linux/nmi.h:33:20: note: previous definition of 'watchdog_nmi_disable_all' was here

vim +/watchdog_nmi_enable_all +654 kernel/watchdog.c

ab992dc3 Peter Zijlstra      2015-05-18  648  unlock:
ab992dc3 Peter Zijlstra      2015-05-18  649  	mutex_unlock(&watchdog_proc_mutex);
b3738d29 Stephane Eranian    2014-11-17  650  }
58687acb Don Zickus          2010-05-07  651  #else
bcd951cf Thomas Gleixner     2012-07-16  652  static int watchdog_nmi_enable(unsigned int cpu) { return 0; }
bcd951cf Thomas Gleixner     2012-07-16  653  static void watchdog_nmi_disable(unsigned int cpu) { return; }
b3738d29 Stephane Eranian    2014-11-17 @654  void watchdog_nmi_enable_all(void) {}
b3738d29 Stephane Eranian    2014-11-17 @655  void watchdog_nmi_disable_all(void) {}
23637d47 Frederic Weisbecker 2010-05-15  656  #endif /* CONFIG_HARDLOCKUP_DETECTOR */
58687acb Don Zickus          2010-05-07  657  
b8900bc0 Frederic Weisbecker 2013-06-06  658  static struct smp_hotplug_thread watchdog_threads = {

:::::: The code at line 654 was first introduced by commit
:::::: b3738d29323344da3017a91010530cf3a58590fc watchdog: Add watchdog enable/disable all functions

:::::: TO: Stephane Eranian <eranian@google.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation