Hi Nishanth,

[auto build test results on v4.3-rc3 -- if it's inappropriate base, please ignore]

config: powerpc-defconfig (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=powerpc 

All error/warnings (new ones prefixed by >>):

   arch/powerpc/platforms/pseries/iommu.c: In function 'iommu_init_early_pSeries':

quoted

arch/powerpc/platforms/pseries/iommu.c:1433:9: error: 'struct machdep_calls' has no member named 'dma_get_page_shift'

      ppc_md.dma_get_page_shift = dma_get_page_shift_pSeriesLP;
            ^

vim +1433 arch/powerpc/platforms/pseries/iommu.c

  1427	
  1428		if (firmware_has_feature(FW_FEATURE_LPAR)) {
  1429			pseries_pci_controller_ops.dma_bus_setup = pci_dma_bus_setup_pSeriesLP;
  1430			pseries_pci_controller_ops.dma_dev_setup = pci_dma_dev_setup_pSeriesLP;
  1431			ppc_md.dma_set_mask = dma_set_mask_pSeriesLP;
  1432			ppc_md.dma_get_required_mask = dma_get_required_mask_pSeriesLP;

1433			ppc_md.dma_get_page_shift = dma_get_page_shift_pSeriesLP;

  1434		} else {
  1435			pseries_pci_controller_ops.dma_bus_setup = pci_dma_bus_setup_pSeries;
  1436			pseries_pci_controller_ops.dma_dev_setup = pci_dma_dev_setup_pSeries;

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