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SubjectRe: [PATCH] Oops and panic while unloading holder of pm_idle
On Thu, 19 Aug 2004, BlaisorBlade wrote:

> (CC me on replies as I'm not subscribed).
>
> A short description, with my hypothesis about how the panic() happened:

There is a short one liner for this which is already in the latest
kernel;

Index: linux-2.6.8-rc1-mm1/drivers/acpi/processor.c
===================================================================
RCS file: /home/cvsroot/linux-2.6.8-rc1-mm1/drivers/acpi/processor.c,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 processor.c
--- linux-2.6.8-rc1-mm1/drivers/acpi/processor.c 14 Jul 2004 04:56:25 -0000 1.1.1.1
+++ linux-2.6.8-rc1-mm1/drivers/acpi/processor.c 20 Jul 2004 15:31:46 -0000
@@ -2372,8 +2372,10 @@ 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);
-
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