On Tue, 2005-11-22 at 08:25 +1100, Paul Mackerras wrote:
> 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.
And other non-ppc embedded things I've seen in the past... I think it's
quite common outside of the x86 world
Ben.
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