linux-kernel - Re: [PATCH v3 11/49] btrfs: avoid access to .bi

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Message-ID: <20170810112959.GG20308@infradead.org>
Date:   Thu, 10 Aug 2017 04:29:59 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     Jens Axboe <axboe@...com>, Christoph Hellwig <hch@...radead.org>,
        Huang Ying <ying.huang@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org
Subject: Re: [PATCH v3 11/49] btrfs: avoid access to .bi_vcnt directly

> +static unsigned int get_bio_pages(struct bio *bio)
> +{
> +	unsigned i;
> +	struct bio_vec *bv;
> +
> +	bio_for_each_segment_all(bv, bio, i)
> +		;
> +
> +	return i;
> +}

s/get_bio_pages/bio_nr_pages/ ?

Also this seems like a useful helper for bio.h