Re: [patch 11/26] x64, x2apic/intr-remap: generic irq migration support from process context

[Eric W. Biederman]

Suresh Siddha <suresh.b.siddha@xxxxxxxxx> writes:

> Generic infrastructure for migrating the irq from the process context in the
> presence of CONFIG_GENERIC_PENDING_IRQ.
>
> This will be used later for migrating irq in the presence of
> interrupt-remapping.

Why the API difference between IRQ_MOVE_PCNTXT set affinity handlers and
!CONFIG_GENERIC_PENDING_IRQ handlers?


>  #ifdef CONFIG_GENERIC_PENDING_IRQ
> -	set_pending_irq(irq, cpumask);
> +	if (desc->status & IRQ_MOVE_PCNTXT) {
> +		unsigned long flags;
> +
> +		spin_lock_irqsave(&desc->lock, flags);
> +		desc->chip->set_affinity(irq, cpumask);
> +		spin_unlock_irqrestore(&desc->lock, flags);
> +	} else
> +		set_pending_irq(irq, cpumask);
>  #else
>  	desc->affinity = cpumask;
>  	desc->chip->set_affinity(irq, cpumask);
>
> -- 
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