ret_zero
} else if (lock->return_type == ret_zero) {
{"down_write_killable", LOCK, write_lock, 0, ret_zero},
{"down_trylock", LOCK, sem, 0, ret_zero},
{"down_timeout", LOCK, sem, 0, ret_zero},
{"down_interruptible", LOCK, sem, 0, ret_zero},
{"down_killable", LOCK, sem, 0, ret_zero},
{"mutex_lock_interruptible", LOCK, mutex, 0, ret_zero},
{"mutex_lock_interruptible_nested", LOCK, mutex, 0, ret_zero},
{"mutex_lock_killable", LOCK, mutex, 0, ret_zero},
{"mutex_lock_killable_nested", LOCK, mutex, 0, ret_zero},
{"ww_mutex_lock_interruptible", LOCK, mutex, 0, ret_zero},
{"ffs_mutex_lock", LOCK, mutex, 0, ret_zero},
{"dma_resv_lock", LOCK, mutex, 0, ret_zero},
{"dma_resv_lock_interruptible", LOCK, mutex, 0, ret_zero},
{"modeset_lock", LOCK, mutex, 0, ret_zero},
{"drm_ modeset_lock", LOCK, mutex, 0, ret_zero},
{"drm_modeset_lock_single_interruptible", LOCK, mutex, 0, ret_zero},