diff --git a/include/linux/pci.h b/include/linux/pci.h
index 09bf88f..4689e2a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -443,6 +443,7 @@
 extern void pci_remove_bus_device(struct pci_dev *dev);
 extern void pci_stop_bus_device(struct pci_dev *dev);
 void pci_setup_cardbus(struct pci_bus *bus);
+extern void pci_sort_breadthfirst(void);
 
 /* Generic PCI functions exported to card drivers */