[PATCH 1/2] powerpc/8xx: Fix NR_IRQ bugs and refactor 8xx interrupt controller

[Grant Likely]

On Tue, 17 Apr 2012 09:03:02 +1000, Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:
> On Mon, 2012-04-16 at 14:13 -0600, Grant Likely wrote:
> > The mpc8xx driver uses a reference to NR_IRQS that is buggy.  It uses
> > NR_IRQs for the array size of the ppc_cached_irq_mask bitmap, but
> > NR_IRQs could be smaller than the number of hardware irqs that
> > ppc_cached_irq_mask tracks.
> > 
> > Also, while fixing that problem, it became apparent that the interrupt
> > controller only supports 32 interrupt numbers, but it is written as if
> > it supports multiple register banks which is more complicated.
> > 
> > This patch pulls out the buggy reference to NR_IRQs and fixes the size
> > of the ppc_cached_irq_mask to match the number of HW irqs.  It also
> > drops the now-unnecessary code since ppc_cached_irq_mask is no longer
> > an array.
> 
> Can you rename ppc_cached_irq_mask while at it ? I think it was written
> that way because it was all copy/pasted from powermac/pic.c which -does-
> need it to be an array (and has the same bugs btw) :-) 

Done; and I think I fixed the pic.c bugs in patch 2.

g.