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

[Christoph Hellwig]

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.