linux-kernel - Re: [PATCH V10 01/19] block: introduce multi-page page bvec helpers

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Message-ID: <20181116131305.GA3165@lst.de>
Date:   Fri, 16 Nov 2018 14:13:05 +0100
From:   Christoph Hellwig <hch@....de>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Dave Chinner <dchinner@...hat.com>,
        Kent Overstreet <kent.overstreet@...il.com>,
        Mike Snitzer <snitzer@...hat.com>, dm-devel@...hat.com,
        Alexander Viro <viro@...iv.linux.org.uk>,
        linux-fsdevel@...r.kernel.org, Shaohua Li <shli@...nel.org>,
        linux-raid@...r.kernel.org, linux-erofs@...ts.ozlabs.org,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        linux-xfs@...r.kernel.org, Gao Xiang <gaoxiang25@...wei.com>,
        Christoph Hellwig <hch@....de>, Theodore Ts'o <tytso@....edu>,
        linux-ext4@...r.kernel.org, Coly Li <colyli@...e.de>,
        linux-bcache@...r.kernel.org, Boaz Harrosh <ooo@...ctrozaur.com>,
        Bob Peterson <rpeterso@...hat.com>, cluster-devel@...hat.com
Subject: Re: [PATCH V10 01/19] block: introduce multi-page page bvec helpers

> -#define bvec_iter_page(bvec, iter)				\
> +#define mp_bvec_iter_page(bvec, iter)				\
>  	(__bvec_iter_bvec((bvec), (iter))->bv_page)
>  
> -#define bvec_iter_len(bvec, iter)				\
> +#define mp_bvec_iter_len(bvec, iter)				\

I'd much prefer if we would stick to the segment naming that
we also use in the higher level helper.

So segment_iter_page, segment_iter_len, etc.

> + * This helpers are for building sp bvec in flight.

Please spell out single page, sp is not easy understandable.