On Wed, Nov 08, 2017 at 02:01:00PM -0500, Josef Bacik wrote: > From: Josef Bacik <jbacik@xxxxxx> > > We use this in btrfs for metadata writeback. > > Signed-off-by: Josef Bacik <jbacik@xxxxxx> Acked-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> In good news, this API will be more readily accessible in the XArray and it'll be exported to modules.