Common subdirectories: ibm-acpi-0.11/config and ibm-acpi-0.11.orig/config
diff -u ibm-acpi-0.11/ibm_acpi.c ibm-acpi-0.11.orig/ibm_acpi.c
--- ibm-acpi-0.11/ibm_acpi.c	2006-01-25 21:57:47.000000000 +0100
+++ ibm-acpi-0.11.orig/ibm_acpi.c	2005-03-17 11:06:16.000000000 +0100
@@ -1752,7 +1752,7 @@
 	return 0;
 }
 
-static int acpi_device_add(struct acpi_device *device)
+static int device_add(struct acpi_device *device)
 {
 	return 0;
 }
@@ -1770,7 +1770,7 @@
 	memset(ibm->driver, 0, sizeof(struct acpi_driver));
 	sprintf(ibm->driver->name, "%s/%s", IBM_NAME, ibm->name);
 	ibm->driver->ids = ibm->hid;
-	ibm->driver->ops.add = &acpi_device_add;
+	ibm->driver->ops.add = &device_add;
 
 	ret = acpi_bus_register_driver(ibm->driver);
 	if (ret < 0) {