diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index faa1d29c0261a5255b223ff3f7e6ace32fb4386d..ce04eb28e029d498fb7f110bf05b100f71ab80db 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -526,7 +526,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
 
 	if (system_state != SYSTEM_BOOTING) {
 		pcibios_resource_survey_bus(root->bus);
-		pci_assign_unassigned_bus_resources(root->bus);
+		pci_assign_unassigned_root_bus_resources(root->bus);
 	}
 
 	pci_bus_add_devices(root->bus);
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 8d1e654256a85c2f3b1ad1430ceefb3e8ea8b8a8..94b777d108bb9ab8515519608b7231c65895a417 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1395,7 +1395,7 @@ static enum enable_type pci_realloc_detect(struct pci_bus *bus,
  * second  and later try will clear small leaf bridge res
  * will stop till to the max  deepth if can not find good one
  */
-static void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus)
+void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus)
 {
 	LIST_HEAD(realloc_head); /* list of resources that
 					want additional resources */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8cd1e6f30acd1a85ea5511162e2a060c9cf58a05..e494c90a00d161d29a4766d5a6ac48494572b2a8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1003,6 +1003,7 @@ int pci_claim_resource(struct pci_dev *, int);
 void pci_assign_unassigned_resources(void);
 void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
 void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
+void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
 void pdev_enable_device(struct pci_dev *);
 int pci_enable_resources(struct pci_dev *, int mask);
 void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),