bcachefs: bch2_trans_relock_notrace()

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/alloc_background.c

@@ -995,7 +995,7 @@ static int bch2_discard_one_bucket(struct btree_trans *trans,
 				     GFP_KERNEL);
 		*discard_pos_done = iter.pos;
 
-		ret = bch2_trans_relock(trans);
+		ret = bch2_trans_relock_notrace(trans);
 		if (ret)
 			goto out;
 	}

fs/bcachefs/btree_iter.h

@@ -206,6 +206,7 @@ int bch2_btree_path_relock_intent(struct btree_trans *, struct btree_path *);
 void bch2_path_put(struct btree_trans *, struct btree_path *, bool);
 
 int bch2_trans_relock(struct btree_trans *);
+int bch2_trans_relock_notrace(struct btree_trans *);
 void bch2_trans_unlock(struct btree_trans *);
 bool bch2_trans_locked(struct btree_trans *);
 

fs/bcachefs/btree_locking.c

@@ -691,6 +691,21 @@ int bch2_trans_relock(struct btree_trans *trans)
 	return 0;
 }
 
+int bch2_trans_relock_notrace(struct btree_trans *trans)
+{
+	struct btree_path *path;
+
+	if (unlikely(trans->restarted))
+		return -((int) trans->restarted);
+
+	trans_for_each_path(trans, path)
+		if (path->should_be_locked &&
+		    !bch2_btree_path_relock_norestart(trans, path, _RET_IP_)) {
+			return btree_trans_restart(trans, BCH_ERR_transaction_restart_relock);
+		}
+	return 0;
+}
+
 void bch2_trans_unlock(struct btree_trans *trans)
 {
 	struct btree_path *path;