[RFC][PATCH -mm 2/4] Hibernation: Turn on ACPI during restore if necessary

["Rafael J. Wysocki" <rjw@sisk.pl>]

From: Rafael J. Wysocki <rjw@sisk.pl>

If the boot kernel doesn't support ACPI and ACPI is not enabled by the platform
boot code, it may be possible to enable ACPI after restoring the system memory
from a hibernation image.  Implement that.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
 drivers/acpi/sleep/main.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6.23-rc3/drivers/acpi/sleep/main.c
===================================================================
--- linux-2.6.23-rc3.orig/drivers/acpi/sleep/main.c	2007-08-14 00:41:10.000000000 +0200
+++ linux-2.6.23-rc3/drivers/acpi/sleep/main.c	2007-08-19 20:01:05.000000000 +0200
@@ -240,6 +240,8 @@ static int acpi_hibernation_enter(void)
 
 static void acpi_hibernation_finish(void)
 {
+	/* If the boot kernel doesn't support ACPI, we may need to enable it */
+	acpi_enable();
 	acpi_leave_sleep_state(ACPI_STATE_S4);
 	acpi_disable_wakeup_device(ACPI_STATE_S4);