On Mon, 13 Jul 2015, Eric Anholt wrote:
> +static void
> +bcm2836_arm_irqchip_smp_init(void)
> +{
> +#ifdef CONFIG_SMP
> +     int i;
> +
> +     /* unmask IPIs */
> +     for_each_possible_cpu(i) {
> +             bcm2836_arm_irqchip_unmask_per_cpu_irq(
> +                     LOCAL_MAILBOX_INT_CONTROL0, 0, i);

Do you really want to enable these interrupts on all possible cpus? Why so?

Shouldn't that be done at the point where a hotplugged CPU is starting ?

Thanks,

        tglx
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