diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index f9e244da30aef9ea9e170c5cce58a524ab5f87a6..9bcb6cbd5aa93988e39bdf2b8c9285512d74df22 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -113,7 +113,7 @@ struct acpiphp_slot {
 
 	u8		device;		/* pci device# */
 
-	u32		sun;		/* ACPI _SUN (slot unique number) */
+	unsigned long long sun;		/* ACPI _SUN (slot unique number) */
 	u32		flags;		/* see below */
 };
 
diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c
index 95b536a23d25d8d9f76d5aa757a411540017fef0..43c10bd261b48612b4ec2fa2620fa14207628805 100644
--- a/drivers/pci/hotplug/acpiphp_core.c
+++ b/drivers/pci/hotplug/acpiphp_core.c
@@ -337,7 +337,7 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
 	slot->hotplug_slot->info->cur_bus_speed = PCI_SPEED_UNKNOWN;
 
 	acpiphp_slot->slot = slot;
-	snprintf(name, SLOT_NAME_SIZE, "%u", slot->acpi_slot->sun);
+	snprintf(name, SLOT_NAME_SIZE, "%llu", slot->acpi_slot->sun);
 
 	retval = pci_hp_register(slot->hotplug_slot,
 					acpiphp_slot->bridge->pci_bus,
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 955aae4071f7a64eeb5cb716aaacf8ebb26c7a11..3affc6472e65253c94b77bcc8aa97061480b85d7 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -255,13 +255,13 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 		bridge->nr_slots++;
 
-		dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n",
+		dbg("found ACPI PCI Hotplug slot %llu at PCI %04x:%02x:%02x\n",
 				slot->sun, pci_domain_nr(bridge->pci_bus),
 				bridge->pci_bus->number, slot->device);
 		retval = acpiphp_register_hotplug_slot(slot);
 		if (retval) {
 			if (retval == -EBUSY)
-				warn("Slot %d already registered by another "
+				warn("Slot %llu already registered by another "
 					"hotplug driver\n", slot->sun);
 			else
 				warn("acpiphp_register_hotplug_slot failed "