linux-kernel - Re: [PATCH 13/13] blk-mq: get rid of the cpumask in struct blk_mq

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Date:   Thu, 15 Sep 2016 07:44:13 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Christoph Hellwig <hch@....de>
Cc:     axboe@...com, tglx@...utronix.de, agordeev@...hat.com,
        keith.busch@...el.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/13] blk-mq: get rid of the cpumask in struct
 blk_mq_tags

> +static int blk_mq_create_mq_map(struct blk_mq_tag_set *set,
> +		const struct cpumask *affinity_mask)
>  {
> +	int queue = -1, cpu = 0;
> +
> +	set->mq_map = kzalloc_node(sizeof(*set->mq_map) * nr_cpu_ids,
> +			GFP_KERNEL, set->numa_node);
> +	if (!set->mq_map)
> +		return -ENOMEM;
> +
> +	if (!affinity_mask)
> +		return 0;	/* map all cpus to queue 0 */
> +
> +	/* If cpus are offline, map them to first hctx */
> +	for_each_online_cpu(cpu) {
> +		if (cpumask_test_cpu(cpu, affinity_mask))
> +			queue++;
> +		if (queue >= 0)
> +			set->mq_map[cpu] = queue;
> +	}
> +
> +	return 0;
>  }

I just noticed that the patch adds this unused function due to a rebase
error.  Jens, do you you just want to fix this up while applying or
should I resend?