45 struct btree_update {  struct
54 	enum btree_update_mode		mode;  argument
55 	enum bch_trans_commit_flags	flags;
79 	 * btree_update operation, and release it when the new node(s)  argument
82 	struct journal_entry_pin	journal;
85 	struct prealloc_nodes {
88 	}				prealloc_nodes[2];
91 	struct keylist			old_keys;
92 	u64				_old_keys[BTREE_UPDATE_NODES_MAX *
96 	struct keylist			new_keys;
97 	u64				_new_keys[BTREE_UPDATE_NODES_MAX *
101 	struct btree			*new_nodes[BTREE_UPDATE_NODES_MAX];
125 struct btree *__bch2_btree_node_alloc_replacement(struct btree_update *,  argument