On Fri, May 03, 2013 at 09:50:53PM -0000, Thomas Gleixner wrote:
> +     /* Init mask cache ? */
> +     if (dgc->gc_flags & IRQ_GC_INIT_MASK_CACHE) {
> +             raw_spin_lock_irqsave(&gc->lock, flags);
> +             gc->mask_cache = irq_reg_readl(gc->reg_base + ct->regs.mask);
> +             raw_spin_unlock_irqrestore(&gc->lock, flags);
> +     }

This looks a little weird to me - it seems that it'll re-read this
each time any irq is mapped in the domain, which is probably not
wanted.
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