[RFC patch 4/8] genirq: generic chip: Cache per irq bit mask

[Russell King - ARM Linux]

On Fri, May 03, 2013 at 09:50:50PM -0000, Thomas Gleixner wrote:
> -	u32 mask = ~(1 << (d->irq - gc->irq_base));
> +	u32 mask = ~(d->mask);

I suspect the above changes are all a result of a search-and-replace
which results in the cosmetic parens remaining.  Would be nice to get
rid of them too as they're completely unnecessary.