Re: [RESEND PATCH V5 00/33] block: support multipage bvec

[Christoph Hellwig]

On Mon, May 28, 2018 at 10:30:43AM +0800, Ming Lei wrote:
> I hate the conversion too, but looks it can't be avoided since
> bio_for_each_segment_all() has to be changed.

I guess you mean what is currently bio_for_each_page_all in your
tree which now takes a bvec_iter_all agument?  We could just
try to hide the bia variable initially under an unlike to be used
name, and then slowly move to the proper bio_for_each_page_all
API unhiding it with the rename.

But I think your current bio_for_each_segment_all should just
go away.  All three users really should be using better abstractions.