diff --git a/fs/bcachefs/btree_iter.c b/fs/bcachefs/btree_iter.c
index 9485208b6758..803cc58ff577 100644
--- a/fs/bcachefs/btree_iter.c
+++ b/fs/bcachefs/btree_iter.c
@@ -3171,6 +3171,9 @@ struct btree_trans *__bch2_trans_get(struct bch_fs *c, unsigned fn_idx)
 
 	trans->paths_allocated[0] = 1;
 
+	static struct lock_class_key lockdep_key;
+	lockdep_init_map(&trans->dep_map, "bcachefs_btree", &lockdep_key, 0);
+
 	if (fn_idx < BCH_TRANSACTIONS_NR) {
 		trans->fn = bch2_btree_transaction_fns[fn_idx];
 
@@ -3440,7 +3443,22 @@ int bch2_fs_btree_iter_init(struct bch_fs *c)
 		mempool_init_kmalloc_pool(&c->btree_trans_mem_pool, 1,
 					  BTREE_TRANS_MEM_MAX) ?:
 		init_srcu_struct(&c->btree_trans_barrier);
-	if (!ret)
-		c->btree_trans_barrier_initialized = true;
-	return ret;
+	if (ret)
+		return ret;
+
+	/*
+	 * static annotation (hackily done) for lock ordering of reclaim vs.
+	 * btree node locks:
+	 */
+#ifdef CONFIG_LOCKDEP
+	fs_reclaim_acquire(GFP_KERNEL);
+	struct btree_trans *trans = bch2_trans_get(c);
+	trans_set_locked(trans);
+	bch2_trans_put(trans);
+	fs_reclaim_release(GFP_KERNEL);
+#endif
+
+	c->btree_trans_barrier_initialized = true;
+	return 0;
+
 }
diff --git a/fs/bcachefs/btree_locking.h b/fs/bcachefs/btree_locking.h
index 8f5f1973c7d8..8dbceec8ec25 100644
--- a/fs/bcachefs/btree_locking.h
+++ b/fs/bcachefs/btree_locking.h
@@ -197,6 +197,7 @@ int bch2_six_check_for_deadlock(struct six_lock *lock, void *p);
 static inline void trans_set_locked(struct btree_trans *trans)
 {
 	if (!trans->locked) {
+		lock_acquire_exclusive(&trans->dep_map, 0, 0, NULL, _THIS_IP_);
 		trans->locked = true;
 		trans->last_unlock_ip = 0;
 
@@ -208,6 +209,7 @@ static inline void trans_set_locked(struct btree_trans *trans)
 static inline void trans_set_unlocked(struct btree_trans *trans)
 {
 	if (trans->locked) {
+		lock_release(&trans->dep_map, _THIS_IP_);
 		trans->locked = false;
 		trans->last_unlock_ip = _RET_IP_;
 
diff --git a/fs/bcachefs/btree_types.h b/fs/bcachefs/btree_types.h
index 4fe77d7f7242..79898f687772 100644
--- a/fs/bcachefs/btree_types.h
+++ b/fs/bcachefs/btree_types.h
@@ -523,6 +523,9 @@ struct btree_trans {
 	unsigned		journal_u64s;
 	unsigned		extra_disk_res; /* XXX kill */
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map	dep_map;
+#endif
 	/* Entries before this are zeroed out on every bch2_trans_get() call */
 
 	struct list_head	list;