RE: [PATCH] x86/ioapic: Fix NULL pointer dereference on CPU hotplugafter disabling irqs

[Siddha, Suresh B]

Tomoki wrote:
> In current Linux, percpu variable `vector_irq' is not always cleared when
> a CPU is offlined. If the cpu that has the disabled irqs in vector_irq is
> hotplugged again, __setup_vector_irq() hits invalid irq vector and may
> crash.
>
> Commit f6175f5bfb4c partially fixes this, but was not enough in
> environments with IOMMU IRQ remapper.

So, this patch essentially makes the commit f6175f5bfb4c unnecessary, right?

Can you revert that too as part of this new proposed patch?

thanks,
suresh--
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