static int bch2_get_btree_in_memory_pos(struct btree_trans *trans,
					unsigned btree_leaf_mask,
					unsigned btree_interior_mask,
					struct bbpos start, struct bbpos *end)
static int bch2_get_btree_in_memory_pos(struct btree_trans *trans,
					u64 btree_leaf_mask,
					u64 btree_interior_mask,
					struct bbpos start, struct bbpos *end)