On Fri, May 30, 2008 at 02:41:17PM -0500, Scott Wood ([EMAIL PROTECTED]) wrote:
> >>Don't you want to protect against simultaneous access to register space
> >>from different CPUs? Or it is single processor board only?
> >
> >Doesn't linux mask the IRQ line for the interrupt currently being
> >serviced, and on all processors?
>
> Yes. Could there be interference from non-interrupt driver code on
> another cpu (or interrupted code), though?
Yes, that register space can be assigned from non-interrupt path on
different cpu. I saw spin_lock_irqsave() is used in some other places,
but not in interrupt handler itself.
--
Evgeniy Polyakov
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