linux-kernel - Re: [PATCH 2/4] md: introduce bio_clone_slow_mddev

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Message-ID: <20170206085259.GA6411@infradead.org>
Date:   Mon, 6 Feb 2017 00:52:59 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Ming Lei <tom.leiming@...il.com>
Cc:     Shaohua Li <shli@...nel.org>, Jens Axboe <axboe@...com>,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
        NeilBrown <neilb@...e.com>
Subject: Re: [PATCH 2/4] md: introduce bio_clone_slow_mddev_partial()

> +struct bio *bio_clone_slow_mddev_partial(struct bio *bio, gfp_t gfp_mask,
> +					 struct mddev *mddev, int offset,
> +					 int size)
> +{
> +	struct bio_set *bs;
> +
> +	if (!mddev || !mddev->bio_set)
> +		bs = fs_bio_set;
> +	else
> +		bs = mddev->bio_set;
> +
> +	return bio_clone_bioset_partial(bio, gfp_mask, bs, offset << 9,
> +					size << 9);
> +}
> +EXPORT_SYMBOL_GPL(bio_clone_slow_mddev_partial);

As far as I can tell the caller always has a mddev, and an active
mddev always has a bio_set.  So let's just skip this wrapper.