Re: [PATCH v4 1/9] lib/group_cpus: let group_cpu_evenly return number of groups

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On Tue, Jan 07, 2025 at 08:51:57AM +0100, Hannes Reinecke wrote:
> >   void blk_mq_map_queues(struct blk_mq_queue_map *qmap)
> >   {
> >   	const struct cpumask *masks;
> > -	unsigned int queue, cpu;
> > +	unsigned int queue, cpu, nr_masks;
> > -	masks = group_cpus_evenly(qmap->nr_queues);
> > +	nr_masks = qmap->nr_queues;
> > +	masks = group_cpus_evenly(&nr_masks);
> 
> Hmph. I am a big fan of separating input and output paramenters;
> most ABI definitions will be doing that anyway.
> Makes it also really hard to track whether the output parameters
> had been set at all. Care to split it up?

What API do you have in mind?




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