--- clean/kernel/signal.c	2004-08-15 19:15:06.000000000 +0200
+++ linux/kernel/signal.c	2004-08-15 19:35:44.000000000 +0200
@@ -1433,9 +1433,7 @@
 	int why, status;
 	struct sighand_struct *psig;
 
-	if (sig == -1)
-		BUG();
-
+	BUG_ON(sig == -1);
 	BUG_ON(tsk->group_leader != tsk && tsk->group_leader->state != TASK_ZOMBIE && !tsk->ptrace);
 	BUG_ON(tsk->group_leader == tsk && !thread_group_empty(tsk) && !tsk->ptrace);
 
@@ -2162,6 +2160,8 @@
 		if (timeout)
 			ret = -EINTR;
 	}
+	if (current->flags & PF_FREEZE)
+		refrigerator(1);
 
 	return ret;
 }