[RFC PATCH kernel] powerpc/xive: Drop deregistered irqs
benh at kernel.crashing.org
Sun Jul 14 11:31:43 AEST 2019
On Sat, 2019-07-13 at 18:53 +1000, Alexey Kardashevskiy wrote:
> On 13/07/2019 09:47, Benjamin Herrenschmidt wrote:
> > On Fri, 2019-07-12 at 19:37 +1000, Alexey Kardashevskiy wrote:
> > >
> > >
> > > If so, then in order to do EOI, I'll need the desc which is gone,
> > > or
> > > I am missing the point?
> > All you need is drop the local CPU priority.
> I know that, the question was how. I cannot use irq_chip in
> arch/powerpc/kernel/irq.c and I do not want to add
Well, best is probably to do just that though, but call it something
like ppc_md.orphan_irq() or something like that instead. Another option
as you mention is to try to scrub queues, but that's trickier to do due
to the lockless nature of the queue handling.
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