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Date:   Wed, 21 Nov 2018 17:08:11 +0100
From:   Christoph Hellwig <hch@lst.de>
To:     Ming Lei <ming.lei@redhat.com>
Cc:     Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
        linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Theodore Ts'o <tytso@mit.edu>,
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        Bob Peterson <rpeterso@redhat.com>, cluster-devel@redhat.com
Subject: Re: [PATCH V11 02/19] block: introduce multi-page bvec helpers
Message-ID: <20181121160811.GA4977@lst.de>
References: <20181121032327.8434-1-ming.lei@redhat.com> <20181121032327.8434-3-ming.lei@redhat.com> <20181121131928.GA1640@lst.de> <20181121150610.GA19111@ming.t460p>
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On Wed, Nov 21, 2018 at 11:06:11PM +0800, Ming Lei wrote:
> bvec_iter_* is used for single-page bvec in current linus tree, and there are
> lots of users now:
> 
> [linux]$ git grep -n "bvec_iter_*" ./ | wc
>     191     995   13242
> 
> If we have to switch it first, it can be a big change, just wondering if Jens
> is happy with that?

Your above grep statement seems to catch every use of struct bvec_iter,
due to the *.

Most uses of bvec_iter_ are either in the block headers, or are
ceph wrappers that match the above and can easily be redefined.