diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index 965bfcc..ee172aa 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -145,7 +145,7 @@
 	for_each_node_by_type(np, "isa") {
 		/* Look for our hose being a parent */
 		for (parent = of_get_parent(np); parent;) {
-			if (parent == hose->arch_data) {
+			if (parent == hose->dn) {
 				of_node_put(parent);
 				break;
 			}
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 5a9d4c7..2f3f30e 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -62,7 +62,7 @@
 	phb->global_number = global_phb_number++;
 	list_add_tail(&phb->list_node, &hose_list);
 	spin_unlock(&hose_spinlock);
-	phb->arch_data = dev;
+	phb->dn = dev;
 	phb->is_dynamic = mem_init_done;
 #ifdef CONFIG_PPC64
 	if (dev) {
@@ -137,7 +137,7 @@
 	while(node) {
 		struct pci_controller *hose, *tmp;
 		list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
-			if (hose->arch_data == node)
+			if (hose->dn == node)
 				return hose;
 		node = node->parent;
 	}
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 0e2bee4..096c97e 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -662,8 +662,8 @@
 
 	/* For each hose, we begin searching bridges */
 	list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
-		struct device_node* node;	
-		node = (struct device_node *)hose->arch_data;
+		struct device_node* node = hose->dn;
+
 		if (!node)
 			continue;
 		make_one_node_map(node, hose->first_busno);
@@ -742,7 +742,7 @@
 		struct pci_controller *hose = pci_bus_to_host(bus);
 		if (hose == NULL)
 			return NULL;
-		return of_node_get(hose->arch_data);
+		return of_node_get(hose->dn);
 	}
 
 	/* not a root bus, we need to get our parent */
@@ -812,9 +812,9 @@
 		return -ENODEV;
 	/* Make sure it's really a PCI device */
 	hose = pci_find_hose_for_OF_device(node);
-	if (!hose || !hose->arch_data)
+	if (!hose || !hose->dn)
 		return -ENODEV;
-	if (!scan_OF_pci_childs(((struct device_node*)hose->arch_data)->child,
+	if (!scan_OF_pci_childs(hose->dn->child,
 			find_OF_pci_device_filter, (void *)node))
 		return -ENODEV;
 	reg = of_get_property(node, "reg", NULL);
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 002cd4c..6b9a856 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -458,7 +458,7 @@
 void __devinit scan_phb(struct pci_controller *hose)
 {
 	struct pci_bus *bus;
-	struct device_node *node = hose->arch_data;
+	struct device_node *node = hose->dn;
 	int i, mode;
 	struct resource *res;
 
@@ -705,8 +705,7 @@
 	if (hose->io_base_alloc == 0)
 		return 0;
 
-	DBG("IO unmapping for PHB %s\n",
-	    ((struct device_node *)hose->arch_data)->full_name);
+	DBG("IO unmapping for PHB %s\n", hose->dn->full_name);
 	DBG("  alloc=0x%p\n", hose->io_base_alloc);
 
 	/* This is a PHB, we fully unmap the IO area */
@@ -765,8 +764,7 @@
 	hose->io_base_virt = (void __iomem *)(area->addr +
 					      hose->io_base_phys - phys_page);
 
-	DBG("IO mapping for PHB %s\n",
-	    ((struct device_node *)hose->arch_data)->full_name);
+	DBG("IO mapping for PHB %s\n", hose->dn->full_name);
 	DBG("  phys=0x%016lx, virt=0x%p (alloc=0x%p)\n",
 	    hose->io_base_phys, hose->io_base_virt, hose->io_base_alloc);
 	DBG("  size=0x%016lx (alloc=0x%016lx)\n",
diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c
index b483903..85d4d89 100644
--- a/arch/powerpc/kernel/pci_dn.c
+++ b/arch/powerpc/kernel/pci_dn.c
@@ -133,7 +133,7 @@
  */
 void __devinit pci_devs_phb_init_dynamic(struct pci_controller *phb)
 {
-	struct device_node * dn = (struct device_node *) phb->arch_data;
+	struct device_node *dn = phb->dn;
 	struct pci_dn *pdn;
 
 	/* PHB nodes themselves must not match */
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index b5c96af..6bdfaf3 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -273,7 +273,7 @@
 #else
 			struct pci_controller *host;
 			host = pci_bus_to_host(pdev->bus);
-			ppnode = host ? host->arch_data : NULL;
+			ppnode = host ? host->dn : NULL;
 #endif
 			/* No node for host bridge ? give up */
 			if (ppnode == NULL)
diff --git a/arch/powerpc/kernel/rtas_pci.c b/arch/powerpc/kernel/rtas_pci.c
index 21f14e5..3650eb5 100644
--- a/arch/powerpc/kernel/rtas_pci.c
+++ b/arch/powerpc/kernel/rtas_pci.c
@@ -260,7 +260,7 @@
 
 int __devinit rtas_setup_phb(struct pci_controller *phb)
 {
-	struct device_node *dev = phb->arch_data;
+	struct device_node *dev = phb->dn;
 
 	if (is_python(dev))
 		python_countermeasures(dev);