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    SubjectRe: [PATCH 4/5] Centralise NO_IRQ definition
    Ingo Molnar writes:

    > is there any architecture where irq 0 is a legitimate setting that could
    > occur in drivers, and which would make NO_IRQ define of 0 non-practical?

    Yes, G5 powermacs have the SATA controller on irq 0. So if we can't
    use irq 0, I can't get to my hard disk. :) Other powermacs also use
    irq 0 for various things, as do embedded PPC machines.

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