tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   ff35dad6205c66d96feda494502753e5ed1b10f1
commit: 6b03171ca26eef5b24f0b1c2b95ce7842fe0a37b [439/499] kernel/watchdog.c: print traces for all cpus on lockup detection
config: x86_64-acpi-redef (attached as .config)

Note: the mmotm/master HEAD ff35dad6205c66d96feda494502753e5ed1b10f1 builds fine.
      It only hurts bisectibility.

All error/warnings:

   kernel/watchdog.c: In function 'watchdog_timer_fn':
>> kernel/watchdog.c:357:4: error: implicit declaration of function 'trigger_allbutself_cpu_backtrace' [-Werror=implicit-function-declaration]
       trigger_allbutself_cpu_backtrace();
       ^
   cc1: some warnings being treated as errors

vim +/trigger_allbutself_cpu_backtrace +357 kernel/watchdog.c

   351				dump_stack();
   352	
   353			if (softlockup_all_cpu_backtrace) {
   354				/* Avoid generating two back traces for current
   355				 * given that one is already made above
   356				 */
 > 357				trigger_allbutself_cpu_backtrace();
   358	
   359				clear_bit(0, &soft_lockup_nmi_warn);
   360				/* Barrier to sync with other cpus */

---
0-DAY kernel build testing backend              Open Source Technology Center
http://lists.01.org/mailman/listinfo/kbuild                 Intel Corporation