[ACPI] synchronize_kernel for idle-loop unload (Zwane Mwaikambo)

http://bugzilla.kernel.org/show_bug.cgi?id=1716

[ACPI] synchronize_kernel for idle-loop unload (Zwane Mwaikambo)
http://bugzilla.kernel.org/show_bug.cgi?id=1716
e0343679 · Len Brown · Len Brown · 94bd188d · e0343679
Commit e0343679 authored Jul 28, 2004 by Len Brown Committed by Len Brown Jul 28, 2004
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drivers/acpi/processor.c drivers/acpi/processor.c +3 -1

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--- a/drivers/acpi/processor.c
+++ b/drivers/acpi/processor.c
@@ -2417,8 +2417,10 @@ acpi_processor_remove (
 	pr = (struct acpi_processor *) acpi_driver_data(device);
 	/* Unregister the idle handler when processor #0 is removed. */
-	if (pr->id == 0)
+	if (pr->id == 0) {
 		pm_idle = pm_idle_save;
+		synchronize_kernel();
+	}
 	status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, 
 		acpi_processor_notify);