* in this block. (unused) */
 /*10*/ __u8            db_signature[8];        /* Signature for verification */
        __le64          db_reserved2;
-       __le64          db_free_next;           /* Next block in list (unused) */
-/*20*/ __le64          db_blkno;               /* Offset on disk, in blocks */
-       __le64          db_parent_dinode;       /* dinode which owns me, in
+/*20*/ __le64          db_free_next;           /* Next block in list (unused) */
+       __le64          db_blkno;               /* Offset on disk, in blocks */
+/*30*/ __le64          db_parent_dinode;       /* dinode which owns me, in
                                                   blocks */
-/*30*/ struct ocfs2_block_check db_check;      /* Error checking */
+       struct ocfs2_block_check db_check;      /* Error checking */
 /*40*/
 };