Re: [PATCH] btrfs: migrate to use folio private instead of page private

[Josef Bacik <josef@toxicpanda.com>]

On Fri, Nov 17, 2023 at 02:24:14PM +1030, Qu Wenruo wrote:
> As a cleanup and preparation for future folio migration, this patch
> would replace all page->private to folio version.
> This includes:
> 
> - PagePrivate()
>   -> folio_test_private()
> 
> - page->private
>   -> folio_get_private()
> 
> - attach_page_private()
>   -> folio_attach_private()
> 
> - detach_page_private()
>   -> folio_detach_private()
> 
> Since we're here, also remove the forced cast on page->private, since
> it's (void *) already, we don't really need to do the cast.
> 
> For now even if we missed some call sites, it won't cause any problem
> yet, as we're only using order 0 folio (single page), thus all those
> folio/page flags should be synced.
> 
> But for the future conversion to utilize higher order folio, the page
> <-> folio flag sync is no longer guaranteed, thus we have to migrate to
> utilize folio flags.
> 
> Signed-off-by: Qu Wenruo <wqu@suse.com>

Reviewed-by: Josef Bacik <josef@toxicpanda.com>

Thanks,

Josef