diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 710803be3a79..e0fcc33dfef6 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -419,7 +419,7 @@ static inline bool pci_is_cardbus_bridge(struct pci_dev *dev)
 	return dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
 }
 #ifdef CONFIG_CARDBUS
-unsigned long pci_cardbus_resource_alignment(struct resource *res);
+unsigned long pci_cardbus_resource_alignment(const struct resource *res);
 int pci_bus_size_cardbus_bridge(struct pci_bus *bus,
 				struct list_head *realloc_head);
 int pci_cardbus_scan_bridge_extend(struct pci_bus *bus, struct pci_dev *dev,
@@ -428,7 +428,7 @@ int pci_cardbus_scan_bridge_extend(struct pci_bus *bus, struct pci_dev *dev,
 int pci_setup_cardbus(char *str);
 
 #else
-static inline unsigned long pci_cardbus_resource_alignment(struct resource *res)
+static inline unsigned long pci_cardbus_resource_alignment(const struct resource *res)
 {
 	return 0;
 }
@@ -1044,8 +1044,8 @@ static inline void pci_suspend_ptm(struct pci_dev *dev) { }
 static inline void pci_resume_ptm(struct pci_dev *dev) { }
 #endif
 
-static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
-						     struct resource *res)
+static inline resource_size_t pci_resource_alignment(const struct pci_dev *dev,
+						     const struct resource *res)
 {
 	int resno = pci_resource_num(dev, res);
 
diff --git a/drivers/pci/setup-cardbus.c b/drivers/pci/setup-cardbus.c
index 1ebd13a1f730..0cba404080ad 100644
--- a/drivers/pci/setup-cardbus.c
+++ b/drivers/pci/setup-cardbus.c
@@ -22,7 +22,7 @@
 static unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
 static unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
 
-unsigned long pci_cardbus_resource_alignment(struct resource *res)
+unsigned long pci_cardbus_resource_alignment(const struct resource *res)
 {
 	if (res->flags & IORESOURCE_IO)
 		return pci_cardbus_io_size;