ACPI: fix boot with acpi=off

Fix acpi_ac/battery boot with acpi=off
Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/ac.c

@@ -285,6 +285,8 @@ static int __init acpi_ac_init(void)
 {
 	int result;
 
+	if (acpi_disabled)
+		return -ENODEV;
 
 	acpi_ac_dir = acpi_lock_ac_dir();
 	if (!acpi_ac_dir)

drivers/acpi/battery.c

@@ -757,6 +757,9 @@ static int __init acpi_battery_init(void)
 {
 	int result;
 
+	if (acpi_disabled)
+		return -ENODEV;
+
 	acpi_battery_dir = acpi_lock_battery_dir();
 	if (!acpi_battery_dir)
 		return -ENODEV;