fix:mkfs.ocfs2 alloc_from_group

[renzhengeek]

2082 start_bit); 2083 if ((end_bit - start_bit) >= count) { 2084 _num_bits = count; 2085 for (_num_bits = 0; num_bits < count; num_bits += 1) { 2086 ocfs2_set_bit(start_bit + num_bits, 2087 group->gd->bg_bitmap); 2088 } 2089 group->gd->bg_free_bits_count -= num_bits; 2090 group->alloc_inode->bi.used_bits += num_bits; 2091 start_blkno = group->gd->bg_blkno + start_bit; 2092 return 0; 2093 }