Re: [stable] [PATCH] x86: Reserve FIRST_DEVICE_VECTOR inused_vectors bitmap

[Alan Cox]

On Fri, 10 Oct 2008 13:41:33 -0700
Greg KH <greg@xxxxxxxxx> wrote:

> On Fri, Oct 10, 2008 at 01:35:48PM -0700, H. Peter Anvin wrote:
> > Greg KH wrote:
> >> Is there a problem with being assigned to IRQ0 in situations like this?
> >
> > On PCs, IRQ 0 is dedicated to use for the PIT.
> 
> Ah, I didn't realize it couldn't be shared.

And more importantly dev->irq == 0 or IRQ == 0 to anything but arch
internal code means "no interrupt line".
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