[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
Hi Yunhong,

[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.4-rc3 next-20151202]

url:    https://github.com/0day-ci/linux/commits/Yunhong-Jiang/KVM-Extract-the-irqfd_wakeup_pollin-irqfd_wakeup_pollup/20151204-024034
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
config: arm64-allmodconfig (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
        # save the attached .config to linux build tree
        make.cross ARCH=arm64 

All errors (new ones prefixed by >>):

   arch/arm64/kvm/built-in.o: In function `kvm_irqfd_assign':
>> :(.text+0x10a70): undefined reference to `irq_bypass_register_consumer'
   arch/arm64/kvm/built-in.o: In function `irqfd_shutdown':
>> :(.text+0x10cd4): undefined reference to `irq_bypass_unregister_consumer'

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