diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3bb2bc2..7f5dab3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -433,7 +433,7 @@
 	return child;
 }
 
-struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr)
+struct pci_bus *__ref pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr)
 {
 	struct pci_bus *child;
 
@@ -948,7 +948,7 @@
 	up_write(&pci_bus_sem);
 }
 
-struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn)
+struct pci_dev *__ref pci_scan_single_device(struct pci_bus *bus, int devfn)
 {
 	struct pci_dev *dev;
 
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 8a7232f..262b043 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -456,7 +456,7 @@
 	}
 }
 
-void pci_bus_size_bridges(struct pci_bus *bus)
+void __ref pci_bus_size_bridges(struct pci_bus *bus)
 {
 	struct pci_dev *dev;
 	unsigned long mask, prefmask;
@@ -511,7 +511,7 @@
 }
 EXPORT_SYMBOL(pci_bus_size_bridges);
 
-void pci_bus_assign_resources(struct pci_bus *bus)
+void __ref pci_bus_assign_resources(struct pci_bus *bus)
 {
 	struct pci_bus *b;
 	struct pci_dev *dev;