bcachefs: Switch extent_handle_overwrites() to one key at a time

Prep work for snapshots

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2021-03-20 21:04:57 -04:00 • committed by Kent Overstreet
commit 4cfb722ca1