> I did it that way because I saw IRQ 0 in /proc/interrupts on every PC...
>
> >
> > It is the job of the platform to map a physical IRQ 0 to some other
> > representation if it exists outside of arch specific code.
>
> Funny.
>
> > This was
> > decided some years ago and a large part of the kernel simply doesn't
> > support any notion of a real IRQ 0.
>
> Can you tell me the reason for that decision or point me to some ml archive?
The natural C way to write "No xxx" is if (!xxx) hence
if (!dev->irq) {
polling_start();
return 0;
}
The PC "IRQ 0" is the timer - which only appears in the arch code.
Alan
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