diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 52b54f053be092e4c589b03d1dd03c6be9deacb6..118c77778d29a3cba7868cfb2cc7948483fc4d10 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -133,7 +133,7 @@ int pci_bus_add_child(struct pci_bus *bus)
  *
  * Call hotplug for each new devices.
  */
-void pci_bus_add_devices(struct pci_bus *bus)
+void pci_bus_add_devices(const struct pci_bus *bus)
 {
 	struct pci_dev *dev;
 	struct pci_bus *child;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index b5d6d0e0f1cb1a2490a4c7836a3aac14e6637c21..a1af2fe00639a0dc0ce44b05984839981dfdb6dc 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -528,7 +528,7 @@ void pcibios_update_irq(struct pci_dev *, int irq);
 /* Generic PCI functions used internally */
 
 extern struct pci_bus *pci_find_bus(int domain, int busnr);
-void pci_bus_add_devices(struct pci_bus *bus);
+void pci_bus_add_devices(const struct pci_bus *bus);
 struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
 				      struct pci_ops *ops, void *sysdata);
 static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,