--- zzzz-none-000/linux-4.4.60/drivers/of/device.c 2017-04-08 07:53:53.000000000 +0000 +++ jet-2400-727/linux-4.4.60/drivers/of/device.c 2021-03-17 14:36:41.000000000 +0000 @@ -88,7 +88,7 @@ int ret; bool coherent; unsigned long offset; - struct iommu_ops *iommu; + const struct iommu_ops *iommu; /* * Set default coherent_dma_mask to 32 bit. Drivers are expected to