Debtor sought to reopen his closed bankruptcy case in order to use 11 U.S.C. § 522(f) to avoid judicial liens on his residence, and creditor objected. The court indicated that, although § 522(f) did not specify a time limit for avoidance claims, such claims could still be barred by laches. Moreover, as such actions are "related to" the bankruptcy case, the court had jurisdiction under 28 U.S.C. § 1471 to consider them, with or without reopening the case.