rem: if (mount->fs->calls->fs_write_fs_info) status = mount->fs->calls->fs_write_fs_info(mount->cookie, info, mask);
add: if (mount->fs->calls->write_fs_info) status = mount->fs->calls->write_fs_info(mount->cookie, info, mask);
context: fs_write_info(dev_t device, const struct fs_info *info, int mask){	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_write_fs_info)		status = mount->fs->calls->fs_write_fs_info(mount->cookie, info, mask);	else		status = EROFS;error:	mutex_unlock(&gMountMutex);	return status;}