On Thu, 15 Jan 2015, Dmitry Eremin-Solenikov wrote:
>  static void sa1100_mask_irq(struct irq_data *d)
>  {
> -     ICMR &= ~BIT(d->hwirq);
> +     u32 reg;
> +     unsigned long flags;
> +
> +     raw_spin_lock_irqsave(&lock, flags);

What's the exact point of that lock? And how is it related to the
$subject of the patch?

Thanks,

        tglx
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