diff -ruN --exclude='*.cmd' --exclude='*.o' --exclude='*.ko' linux.old/drivers/acpi/scan.c linux-2.6.9/drivers/acpi/scan.c
--- linux.old/drivers/acpi/scan.c	2004-09-04 14:16:37.000000000 +0200
+++ linux-2.6.9/drivers/acpi/scan.c	2004-09-04 14:39:47.000000000 +0200
@@ -8,6 +8,7 @@
 #include <acpi/acpi_drivers.h>
 #include <acpi/acinterp.h>	/* for acpi_ex_eisa_id_to_string() */
 
+#include <linux/module.h>
 
 #define _COMPONENT		ACPI_BUS_COMPONENT
 ACPI_MODULE_NAME		("scan")
@@ -1070,4 +1071,22 @@
 	return_VALUE(result);
 }
 
+int acpi_driver_scan(void (* handler)(struct acpi_device * dev))
+{
+	struct list_head * node, * next;
+	if (!handler)
+		 return_VALUE(-EINVAL);
+
+	spin_lock(&acpi_device_lock);
+	list_for_each_safe(node, next, &acpi_device_list) {
+		struct acpi_device * dev = container_of(node, struct acpi_device, g_list);
+		spin_unlock(&acpi_device_lock);
+		handler(dev);
+		spin_lock(&acpi_device_lock);
+	}
+	spin_unlock(&acpi_device_lock);
+	return_VALUE(0);
+}
+
 subsys_initcall(acpi_scan_init);
+EXPORT_SYMBOL(acpi_driver_scan);