--- zzzz-none-000/linux-4.4.271/drivers/of/device.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/drivers/of/device.c	2023-04-19 10:22:29.000000000 +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