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force offline the processor during hot-removal

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The ACPI device node for the cpu has already been unregistered
when acpi_processor_handle_eject is called.
Thus we should offline the cpu and continue, rather than a failure here.
http://bugzilla.kernel.org/show_bug.cgi?id=9772

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Zhang Rui 2008-04-29 02:35:56 -04:00 committed by Andi Kleen
parent 26d46867b7
commit b62b8ef906
2 changed files with 4 additions and 3 deletions
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6
drivers/acpi/processor_core.c
View file

@ -1014,9 +1014,9 @@ static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu)
static int acpi_processor_handle_eject(struct acpi_processor *pr) static int acpi_processor_handle_eject(struct acpi_processor *pr)
{ {
if (cpu_online(pr->id)) { if (cpu_online(pr->id))
return (-EINVAL); cpu_down(pr->id);
}
arch_unregister_cpu(pr->id); arch_unregister_cpu(pr->id);
acpi_unmap_lsapic(pr->id); acpi_unmap_lsapic(pr->id);
return (0); return (0);

1
kernel/cpu.c
View file

@ -299,6 +299,7 @@ int __ref cpu_down(unsigned int cpu)
cpu_maps_update_done(); cpu_maps_update_done();
return err; return err;
} }
EXPORT_SYMBOL(cpu_down);
#endif /*CONFIG_HOTPLUG_CPU*/ #endif /*CONFIG_HOTPLUG_CPU*/
/* Requires cpu_add_remove_lock to be held */ /* Requires cpu_add_remove_lock to be held */