diff --git a/sound/sparc/amd7930.c b/sound/sparc/amd7930.c
index c899786..07962a3 100644
--- a/sound/sparc/amd7930.c
+++ b/sound/sparc/amd7930.c
@@ -1067,8 +1067,8 @@
 
 static int __devinit amd7930_obio_attach(struct device_node *dp)
 {
-	struct linux_prom_registers *regs;
-	struct linux_prom_irqs *irqp;
+	const struct linux_prom_registers *regs;
+	const struct linux_prom_irqs *irqp;
 	struct resource res, *rp;
 	int len;
 
diff --git a/sound/sparc/cs4231.c b/sound/sparc/cs4231.c
index f5956d5..900a00d 100644
--- a/sound/sparc/cs4231.c
+++ b/sound/sparc/cs4231.c
@@ -2284,7 +2284,7 @@
 			if (!strcmp(edev->prom_node->name, "SUNW,CS4231")) {
 				match = 1;
 			} else if (!strcmp(edev->prom_node->name, "audio")) {
-				char *compat;
+				const char *compat;
 
 				compat = of_get_property(edev->prom_node,
 							 "compatible", NULL);