[PATCH v2 2/3] powerpc: use NMI IPI for smp_send_stop

[kbuild test robot]

Hi Nicholas,

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.14-rc6 next-20171018]
[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/Nicholas-Piggin/avoid-secondary-hold-spinloop-when-possible/20171023-173012
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-ge_imp3a_defconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/smp.o: In function `smp_send_stop':
>> smp.c:(.text+0x774): undefined reference to `smp_send_nmi_ipi'

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