diff --git a/lib/devres.c b/lib/devres.c
index edc27a5..26c87c4 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -20,7 +20,7 @@
  *
  * Managed ioremap().  Map is automatically unmapped on driver detach.
  */
-void __iomem *devm_ioremap(struct device *dev, unsigned long offset,
+void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
 			   unsigned long size)
 {
 	void __iomem **ptr, *addr;
@@ -49,7 +49,7 @@
  * Managed ioremap_nocache().  Map is automatically unmapped on driver
  * detach.
  */
-void __iomem *devm_ioremap_nocache(struct device *dev, unsigned long offset,
+void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
 				   unsigned long size)
 {
 	void __iomem **ptr, *addr;