Re: [dm-devel] [PATCH v5 09/12] block: Rework bio_pair_split()

[Tejun Heo <tj kernel org>]

Hello,

On Mon, Aug 06, 2012 at 03:08:38PM -0700, Kent Overstreet wrote:
> This changes bio_pair_split() to use the new bio_split() underneath,
> which gets rid of the single page bio limitation. The various callers
> are fixed up for the slightly different struct bio_pair, and to remove
> the unnecessary checks.
> 
> v5: Move extern declaration to proper patch, per Boaz

I don't get this.  Why can't bio_split() chain the split to the
original one thus make bio_pair unnecessary?  It's not like completing
the split bio with the same end_io ever makes sense.

Thanks.

-- 
tejun