Hi Eric,

[auto build test ERROR on v4.5-rc1]
[also build test ERROR on next-20160125]
[cannot apply to iommu/next]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Eric-Auger/KVM-PCIe-MSI-passthrough-on-ARM-ARM64/20160126-211921
config: x86_64-randconfig-s3-01270003 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/built-in.o: In function `vfio_reserved_binding_release':
   vfio_iommu_type1.c:(.text+0x1d537b): undefined reference to `free_iova'
   drivers/built-in.o: In function `vfio_iommu_type1_alloc_map_reserved_iova':
   vfio_iommu_type1.c:(.text+0x1d5b32): undefined reference to `alloc_iova'
   vfio_iommu_type1.c:(.text+0x1d5d67): undefined reference to `free_iova'
   drivers/built-in.o: In function `vfio_remove_dma':
>> vfio_iommu_type1.c:(.text+0x1d6c80): undefined reference to `put_iova_domain'
   drivers/built-in.o: In function `vfio_iommu_type1_ioctl':
>> vfio_iommu_type1.c:(.text+0x1d81f8): undefined reference to `init_iova_domain'

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