int mnt_fs_prepend_attributes(struct libmnt_fs *fs, const char *optstr)
{
	if (!fs)
		return -EINVAL;
	if (!optstr)
		return 0;
	return mnt_optstr_prepend_option(&fs->attrs, optstr, NULL);
}
int mnt_fs_prepend_attributes(struct libmnt_fs *fs, const char *optstr)
{
	if (!fs)
		return -EINVAL;
	if (!optstr)
		return 0;
	return mnt_optstr_prepend_option(&fs->attrs, optstr, NULL);
}