linux-kernel - Re: [PATCH V10 12/19] block: allow bio_for_each_segment

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Date:   Thu, 15 Nov 2018 13:42:52 +0100
From:   David Sterba <dsterba@...e.cz>
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>,
        linux-fsdevel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shaohua Li <shli@...nel.org>, linux-raid@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-btrfs@...r.kernel.org,
        David Sterba <dsterba@...e.com>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        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 12/19] block: allow bio_for_each_segment_all() to
 iterate over multi-page bvec

On Thu, Nov 15, 2018 at 04:52:59PM +0800, Ming Lei wrote:
> diff --git a/block/blk-zoned.c b/block/blk-zoned.c
> index 13ba2011a306..789b09ae402a 100644
> --- a/block/blk-zoned.c
> +++ b/block/blk-zoned.c
> @@ -123,6 +123,7 @@ static int blk_report_zones(struct gendisk *disk, sector_t sector,
>  	unsigned int z = 0, n, nrz = *nr_zones;
>  	sector_t capacity = get_capacity(disk);
>  	int ret;
> +	struct bvec_iter_all iter_all;
>  
>  	while (z < nrz && sector < capacity) {
>  		n = nrz - z;

iter_all is added but not used and I don't see any
bio_for_each_segment_all for conversion in this function.