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

On Fri, Jun 01, 2018 at 01:43:02AM -0700, Christoph Hellwig wrote:

On Mon, May 28, 2018 at 10:30:43AM +0800, Ming Lei wrote:

quoted

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.

I tried that way at the beginning, it will cause gcc warning, since
the variable will be defined in the middle of one function, and even
worse it might break nested iterator case.

Thanks,
Ming