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    SubjectRe: [stable] [PATCH] x86: Reserve FIRST_DEVICE_VECTOR in used_vectors bitmap
    On Fri, Oct 10, 2008 at 09:50:38PM +0100, Alan Cox wrote:
    > On Fri, 10 Oct 2008 13:41:33 -0700
    > Greg KH <greg@kroah.com> 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".

    I thought we had changed that a while ago, as some arches had 0 as a
    valid irq line.

    Anyway, thanks all for the information, I appreciate it.

    greg k-h


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