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

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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@xxxxxxxxx>

It would be really nice to have a comment in the code why it's
even checking for multiple segments.

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