linux-kernel - Re: [PATCH V12 05/20] block: remove bvec_iter

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Message-ID: <20181126221606.GF30411@vader>
Date:   Mon, 26 Nov 2018 14:16:06 -0800
From:   Omar Sandoval <osandov@...ndov.com>
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,
        Theodore Ts'o <tytso@....edu>, Omar Sandoval <osandov@...com>,
        Sagi Grimberg <sagi@...mberg.me>,
        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, 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>, 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 V12 05/20] block: remove bvec_iter_rewind()

On Mon, Nov 26, 2018 at 10:17:05AM +0800, Ming Lei wrote:
> Commit 7759eb23fd980 ("block: remove bio_rewind_iter()") removes
> bio_rewind_iter(), then no one uses bvec_iter_rewind() any more,
> so remove it.

Reviewed-by: Omar Sandoval <osandov@...com>

> Signed-off-by: Ming Lei <ming.lei@...hat.com>
> ---
>  include/linux/bvec.h | 24 ------------------------
>  1 file changed, 24 deletions(-)
> 
> diff --git a/include/linux/bvec.h b/include/linux/bvec.h
> index 02c73c6aa805..ba0ae40e77c9 100644
> --- a/include/linux/bvec.h
> +++ b/include/linux/bvec.h
> @@ -92,30 +92,6 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv,
>  	return true;
>  }
>  
> -static inline bool bvec_iter_rewind(const struct bio_vec *bv,
> -				     struct bvec_iter *iter,
> -				     unsigned int bytes)
> -{
> -	while (bytes) {
> -		unsigned len = min(bytes, iter->bi_bvec_done);
> -
> -		if (iter->bi_bvec_done == 0) {
> -			if (WARN_ONCE(iter->bi_idx == 0,
> -				      "Attempted to rewind iter beyond "
> -				      "bvec's boundaries\n")) {
> -				return false;
> -			}
> -			iter->bi_idx--;
> -			iter->bi_bvec_done = __bvec_iter_bvec(bv, *iter)->bv_len;
> -			continue;
> -		}
> -		bytes -= len;
> -		iter->bi_size += len;
> -		iter->bi_bvec_done -= len;
> -	}
> -	return true;
> -}
> -
>  #define for_each_bvec(bvl, bio_vec, iter, start)			\
>  	for (iter = (start);						\
>  	     (iter).bi_size &&						\
> -- 
> 2.9.5
>