Re: [PATCH v20 29/32] block: Replace BIO_NO_PAGE_REF with BIO_PAGE_REFFED with inverted logic

[Kent Overstreet]

On Fri, May 19, 2023 at 08:56:56PM -0700, Christoph Hellwig wrote:
> On Fri, May 19, 2023 at 09:26:07PM -0400, Kent Overstreet wrote:
> > On Fri, May 19, 2023 at 08:40:44AM +0100, David Howells wrote:
> > > From: Christoph Hellwig <hch@xxxxxx>
> > > 
> > > Replace BIO_NO_PAGE_REF with a BIO_PAGE_REFFED flag that has the inverted
> > > meaning is only set when a page reference has been acquired that needs to
> > > be released by bio_release_pages().
> > 
> > What was the motivation for this patch?
> 
> So that is only is set when we need to release a page, instead telling
> code to not release it when it otherwise would, where otherwise would
> is implicit and undocumented and changes in this series.

I suppose this way setting it can be done in bio_iov_iter_get_pages() -
ok yeah, that makes sense.

But it seems like it should be set in bio_iov_iter_get_pages() though,
and I'm not seeing that?