__ATTR_PREALLOC
__ATTR_PREALLOC(state, S_IRUGO|S_IWUSR, state_show, state_store);
__ATTR_PREALLOC(resync_start, S_IRUGO|S_IWUSR,
__ATTR_PREALLOC(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store);
__ATTR_PREALLOC(metadata_version, S_IRUGO|S_IWUSR, metadata_show, metadata_store);
__ATTR_PREALLOC(sync_action, S_IRUGO|S_IWUSR, action_show, action_store);
__ATTR_PREALLOC(sync_completed, S_IRUGO, sync_completed_show, NULL);
__ATTR_PREALLOC(_name, _mode, _show, _store)