lockd: use to_delayed_work

Use to_delayed_work() instead of open-coding it.

Signed-off-by: Geliang Tang <[e-mail]>
Signed-off-by: J. Bruce Fields <[e-mail]>

fs/lockd/svc.c

···
 
 static void grace_ender(struct work_struct *grace)
 {
-	struct delayed_work *dwork = container_of(grace, struct delayed_work,
-						  work);
+	struct delayed_work *dwork = to_delayed_work(grace);
 	struct lockd_net *ln = container_of(dwork, struct lockd_net,
 					    grace_period_end);