rem: if (mount->fs->calls->fs_read_fs_info) status = mount->fs->calls->fs_read_fs_info(mount->cookie, info);
add: if (mount->fs->calls->read_fs_info) status = mount->fs->calls->read_fs_info(mount->cookie, info);
context: fs_read_info(dev_t device, struct fs_info *info){	struct fs_mount *mount;	int status;	mutex_lock(&gMountMutex);		mount = find_mount(device);	if (mount == NULL) {		status = EINVAL;		goto error;	}	if (mount->fs->calls->fs_read_fs_info)		status = mount->fs->calls->fs_read_fs_info(mount->cookie, info);	else		status = EOPNOTSUPP;	// fill in other info the file system doesn't (have to) know about	info->dev = mount->id;	info->root = mount->root_vnode->id;error:	mutex_unlock(&gMountMutex);	return status;}