[PATCH] Fix panic-at-boot

This fixes a panic-at-boot when ACPI Hotplug PCI is compiled in, but
ACPI is disabled.  It just makes sure that the list is properly
initialized statically instead of depending on runtime initialization
that may or may not happen.

drivers/acpi/pci_root.c

@@ -66,7 +66,7 @@ struct acpi_pci_root {
 	u64			io_tra;
 };
 
-struct list_head		acpi_pci_roots;
+static LIST_HEAD(acpi_pci_roots);
 
 static struct acpi_pci_driver *sub_driver;
 
@@ -375,8 +375,6 @@ static int __init acpi_pci_root_init (void)
 	acpi_dbg_level = 0xFFFFFFFF;
 	 */
 
- 	INIT_LIST_HEAD(&acpi_pci_roots);
-
 	if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0)
 		return_VALUE(-ENODEV);