Hi Hidehiro,

[auto build test ERROR on v4.4-rc4]
[also build test ERROR on next-20151209]
[cannot apply to tip/x86/core]

url:    https://github.com/0day-ci/linux/commits/Hidehiro-Kawai/Fix-race-issues-among-panic-NMI-and-crash_kexec/20151210-095254
config: x86_64-randconfig-s4-12101030 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/built-in.o: In function `do_nmi':
>> (.text+0x7339): undefined reference to `run_crash_ipi_callback'

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0-DAY kernel test infrastructure                Open Source Technology Center
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