Hi Krishna,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on next-20181019]
[cannot apply to v4.19]
[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/Krishna-Reddy/Add-Tegra194-Dual-ARM-SMMU-driver/20181024-123501
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: arm-multi_v7_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 7.2.0-11) 7.2.0
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
        GCC_VERSION=7.2.0 make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   drivers/iommu/tegra194-smmu.o: In function `arm_smmu_attach_dev':

quoted

tegra194-smmu.c:(.text+0x1800): undefined reference to `alloc_io_pgtable_ops'

   drivers/iommu/tegra194-smmu.o: In function `arm_smmu_domain_free':

quoted

tegra194-smmu.c:(.text+0x1af8): undefined reference to `free_io_pgtable_ops'

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