bcachefs: Clean up bch2_extent_can_insert

It was using an internal btree node iterator interface, when
bch2_btree_iter_peek_slot() sufficed. We were hitting a null ptr deref
that looked like it was from the iterator not being uptodate - this will
also fix that.

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 2021-01-20 19:42:09 -05:00 • committed by Kent Overstreet
commit ef470b4817