find_usage_backwards 1172 kernel/lockdep.c ret = find_usage_backwards(entry->class, depth+1); find_usage_backwards 1249 kernel/lockdep.c ret = find_usage_backwards(hlock_class(prev), 0); find_usage_backwards 1912 kernel/lockdep.c ret = find_usage_backwards(hlock_class(this), 0);