linux-kernel - Re: [PATCH V5 6/8] block: introduce .last_merge and .hash to blk_mq

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Date:   Tue, 3 Oct 2017 02:19:22 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     Jens Axboe <axboe@...com>, linux-block@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Laurence Oberman <loberman@...hat.com>,
        Paolo Valente <paolo.valente@...aro.org>,
        Oleksandr Natalenko <oleksandr@...alenko.name>,
        Tom Nguyen <tom81094@...il.com>, linux-kernel@...r.kernel.org,
        Omar Sandoval <osandov@...com>
Subject: Re: [PATCH V5 6/8] block: introduce .last_merge and .hash to
 blk_mq_ctx

> +enum elv_merge elv_merge_ctx(struct request_queue *q, struct request **req,
> +		struct bio *bio, struct blk_mq_ctx *ctx)
> +{
> +	WARN_ON_ONCE(!q->mq_ops);
> +	return __elv_merge(q, req, bio, ctx->hash, ctx->last_merge);
> +}

This function only has a single caller, just open code it.