Re: [RFC v2 PATCH 08/14] irq: implement irq_send_ipi

[Qais Yousef]

On 10/13/2015 02:40 PM, Thomas Gleixner wrote:
> On Tue, 13 Oct 2015, Qais Yousef wrote:
>
> Lacks kerneldoc
>
> > +int __irq_desc_send_ipi(struct irq_desc *desc, const struct ipi_mask *dest)
> > +{
> > +	struct irq_data *data = irq_desc_get_irq_data(desc);
> > +	struct irq_chip *chip = irq_data_get_irq_chip(data);
> > +
> > +	if (!chip || !chip->irq_send_ipi)
> > +		return -EINVAL;
> > +
> > +	/*
> > +	 * Do not validate the mask for IPIs marked global. These are
> > +	 * regular IPIs so we can avoid the operation as their target
> > +	 * mask is the cpu_possible_mask.
> > +	 */
> > +	if (!dest->global) {
> > +		if (!bitmap_subset(dest->cpumask, data->ipi_mask.cpumask,
> > +				   dest->nbits))
> > +			return -EINVAL;
> > +	}
> This looks half thought out. You rely on the caller getting the global
> bit right. There should be a sanity check for this versus
> data->ipi_mask and also you need to validate nbits.

Yes I might have rushed this part as I did it last. I'll improve it.

> > +EXPORT_SYMBOL(irq_send_ipi);
> EXPORT_SYMBOL_GPL please

OK.

Thanks,
Qais
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