[dm-devel] [PATCH 09/60] dm: dm.c: replace 'bio->bi_vcnt == 1' with !bio_multiple_segments

[Ming Lei]

On Mon, Oct 31, 2016 at 11:29 PM, Christoph Hellwig <hch at infradead.org> wrote:
> On Sat, Oct 29, 2016 at 04:08:08PM +0800, Ming Lei wrote:
>> Avoid to access .bi_vcnt directly, because it may be not what
>> the driver expected any more after supporting multipage bvec.
>>
>> Signed-off-by: Ming Lei <tom.leiming at gmail.com>
>
> It would be really nice to have a comment in the code why it's
> even checking for multiple segments.
>

OK, will add comment about using !bio_multiple_segments(rq->bio)
to replace 'rq->bio->bi_vcnt == 1'.


Thanks,
Ming Lei