Re: [RFC patch 2/5] genirq: add a quick check handler

[Christoph Hellwig]

On Wed, Oct 01, 2008 at 11:02:18PM -0000, Thomas Gleixner wrote:
> Preparatory patch for threaded interrupt handlers.
> 
> Adds a quick check handler which is called before the real handler.
> The quick check handler can decide whether the interrupt was originated
> from the device or not. It can also declare the interrupt as handled
> and subsequently avoid that the real handler is called.

I'd rather leave the handler as a handle which could return
IRQ_NEEDS_HANDLING to get a separate thread_fn called.  This seems more
intuitive and means less mess in the fastpath.

Maybe IRQ_NEEDS_HANDLING might better be named IRQ_THREADED os similar,
but that's really getting into nitpicking..

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