udf_add_free_space
udf_add_free_space(sb, sbi->s_partition, count);
udf_add_free_space(sb, partition, -alloc_count);
udf_add_free_space(sb, partition, -1);
udf_add_free_space(sb, sbi->s_partition, count);
udf_add_free_space(sb, partition, -alloc_count);
udf_add_free_space(sb, partition, -1);