diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c
index a7809a00324cadd66c60fe0f5f78cc71b6a72be8..914a216da33978f388bab53c390ac28abbce9116 100644
--- a/arch/sparc64/kernel/pci.c
+++ b/arch/sparc64/kernel/pci.c
@@ -282,10 +282,10 @@ int __init pcic_present(void)
 	return pci_controller_scan(pci_is_controller);
 }
 
-struct pci_iommu_ops *pci_iommu_ops;
+const struct pci_iommu_ops *pci_iommu_ops;
 EXPORT_SYMBOL(pci_iommu_ops);
 
-extern struct pci_iommu_ops pci_sun4u_iommu_ops,
+extern const struct pci_iommu_ops pci_sun4u_iommu_ops,
 	pci_sun4v_iommu_ops;
 
 /* Find each controller in the system, attach and initialize
diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c
index 554daabb381e2d76291f0ad75072b70bf61783b2..aefdcc51045b19b1544b294754d9b8815fe580b0 100644
--- a/arch/sparc64/kernel/pci_iommu.c
+++ b/arch/sparc64/kernel/pci_iommu.c
@@ -759,7 +759,7 @@ static void pci_4u_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist
 	spin_unlock_irqrestore(&iommu->lock, flags);
 }
 
-struct pci_iommu_ops pci_sun4u_iommu_ops = {
+const struct pci_iommu_ops pci_sun4u_iommu_ops = {
 	.alloc_consistent		= pci_4u_alloc_consistent,
 	.free_consistent		= pci_4u_free_consistent,
 	.map_single			= pci_4u_map_single,
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
index c6feae6e9690723a6dad5cf8667059696b4f2a22..a8c12c1e80392a29748ad536a1263e7164e785c8 100644
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ b/arch/sparc64/kernel/pci_sun4v.c
@@ -583,7 +583,7 @@ static void pci_4v_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist
 	/* Nothing to do... */
 }
 
-struct pci_iommu_ops pci_sun4v_iommu_ops = {
+const struct pci_iommu_ops pci_sun4v_iommu_ops = {
 	.alloc_consistent		= pci_4v_alloc_consistent,
 	.free_consistent		= pci_4v_free_consistent,
 	.map_single			= pci_4v_map_single,
diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h
index b14a725b430dc4d0e536d4652d5f66efd79ca668..47cea16e1badd54d867d2add632aa6fdaa96c6e0 100644
--- a/include/asm-sparc64/pci.h
+++ b/include/asm-sparc64/pci.h
@@ -54,7 +54,7 @@ struct pci_iommu_ops {
 	void (*dma_sync_sg_for_cpu)(struct pci_dev *, struct scatterlist *, int, int);
 };
 
-extern struct pci_iommu_ops *pci_iommu_ops;
+extern const struct pci_iommu_ops *pci_iommu_ops;
 
 /* Allocate and map kernel buffer using consistent mode DMA for a device.
  * hwdev should be valid struct pci_dev pointer for PCI devices.