backward_mask    2230 kernel/locking/lockdep.c 	unsigned long usage_mask = 0, forward_mask, backward_mask;
backward_mask    2276 kernel/locking/lockdep.c 	backward_mask = original_mask(target_entry1->class->usage_mask);
backward_mask    2278 kernel/locking/lockdep.c 	ret = find_usage_backwards(&this, backward_mask, &target_entry);