bcachefs: Simplify reflink trigger

Now that we only mark entire extents, we can ditch the
"reflink_p_frag_references" code.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-06-07 13:39:21 -04:00 • committed by Kent Overstreet
commit c1949baa51