cur->bc_rec.a.ar_startblock = bno;
        cur->bc_rec.a.ar_blockcount = len;
        error = xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat);
-       cur->bc_private.a.priv.abt.active = (*stat == 1);
+       cur->bc_ag.priv.abt.active = (*stat == 1);
        return error;
 }
 
        cur->bc_rec.a.ar_startblock = bno;
        cur->bc_rec.a.ar_blockcount = len;
        error = xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat);
-       cur->bc_private.a.priv.abt.active = (*stat == 1);
+       cur->bc_ag.priv.abt.active = (*stat == 1);
        return error;
 }
 
        cur->bc_rec.a.ar_startblock = bno;
        cur->bc_rec.a.ar_blockcount = len;
        error = xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat);
-       cur->bc_private.a.priv.abt.active = (*stat == 1);
+       cur->bc_ag.priv.abt.active = (*stat == 1);
        return error;
 }
 
 xfs_alloc_cur_active(
        struct xfs_btree_cur    *cur)
 {
-       return cur && cur->bc_private.a.priv.abt.active;
+       return cur && cur->bc_ag.priv.abt.active;
 }
 
 /*
        int                     *stat)  /* output: success/failure */
 {
        struct xfs_mount        *mp = cur->bc_mp;
-       xfs_agnumber_t          agno = cur->bc_private.a.agno;
+       xfs_agnumber_t          agno = cur->bc_ag.agno;
        union xfs_btree_rec     *rec;
        int                     error;
 
                deactivate = true;
 out:
        if (deactivate)
-               cur->bc_private.a.priv.abt.active = false;
+               cur->bc_ag.priv.abt.active = false;
        trace_xfs_alloc_cur_check(args->mp, cur->bc_btnum, bno, len, diff,
                                  *new);
        return 0;
                if (error)
                        return error;
                if (i == 0)
-                       cur->bc_private.a.priv.abt.active = false;
+                       cur->bc_ag.priv.abt.active = false;
 
                if (count > 0)
                        count--;
                if (error)
                        return error;
                if (i) {
-                       acur->cnt->bc_private.a.priv.abt.active = true;
+                       acur->cnt->bc_ag.priv.abt.active = true;
                        fbcur = acur->cnt;
                        fbinc = false;
                }
 
        struct xfs_btree_cur    *cur)
 {
        return xfs_allocbt_init_cursor(cur->bc_mp, cur->bc_tp,
-                       cur->bc_private.a.agbp, cur->bc_private.a.agno,
+                       cur->bc_ag.agbp, cur->bc_ag.agno,
                        cur->bc_btnum);
 }
 
        union xfs_btree_ptr     *ptr,
        int                     inc)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
        int                     btnum = cur->bc_btnum;
        xfs_agblock_t           bno;
 
        /* Allocate the new block from the freelist. If we can't, give up.  */
-       error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_private.a.agbp,
+       error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_ag.agbp,
                                       &bno, 1);
        if (error)
                return error;
                return 0;
        }
 
-       xfs_extent_busy_reuse(cur->bc_mp, cur->bc_private.a.agno, bno, 1, false);
+       xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agno, bno, 1, false);
 
        xfs_trans_agbtree_delta(cur->bc_tp, 1);
        new->s = cpu_to_be32(bno);
        struct xfs_btree_cur    *cur,
        struct xfs_buf          *bp)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_agblock_t           bno;
        int                     error;
        int                     ptr,
        int                     reason)
 {
-       struct xfs_agf          *agf = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agf          *agf = cur->bc_ag.agbp->b_addr;
        xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
        struct xfs_perag        *pag;
        __be32                  len;
        pag = xfs_perag_get(cur->bc_mp, seqno);
        pag->pagf_longest = be32_to_cpu(len);
        xfs_perag_put(pag);
-       xfs_alloc_log_agf(cur->bc_tp, cur->bc_private.a.agbp, XFS_AGF_LONGEST);
+       xfs_alloc_log_agf(cur->bc_tp, cur->bc_ag.agbp, XFS_AGF_LONGEST);
 }
 
 STATIC int
        struct xfs_btree_cur    *cur,
        union xfs_btree_ptr     *ptr)
 {
-       struct xfs_agf          *agf = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agf          *agf = cur->bc_ag.agbp->b_addr;
 
-       ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
+       ASSERT(cur->bc_ag.agno == be32_to_cpu(agf->agf_seqno));
 
        ptr->s = agf->agf_roots[cur->bc_btnum];
 }
                cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);
        }
 
-       cur->bc_private.a.agbp = agbp;
-       cur->bc_private.a.agno = agno;
-       cur->bc_private.a.priv.abt.active = false;
+       cur->bc_ag.agbp = agbp;
+       cur->bc_ag.agno = agno;
+       cur->bc_ag.priv.abt.active = false;
 
        if (xfs_sb_version_hascrc(&mp->m_sb))
                cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
 
 {
        if (level <= 0)
                return false;
-       return xfs_verify_agbno(cur->bc_mp, cur->bc_private.a.agno, agbno);
+       return xfs_verify_agbno(cur->bc_mp, cur->bc_ag.agno, agbno);
 }
 
 /*
                        return 0;
                xfs_err(cur->bc_mp,
 "AG %u: Corrupt btree %d pointer at level %d index %d.",
-                               cur->bc_private.a.agno, cur->bc_btnum,
+                               cur->bc_ag.agno, cur->bc_btnum,
                                level, index);
        }
 
 
 
        if ((lr & XFS_BTCUR_LEFTRA) && left != NULLAGBLOCK) {
-               xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
+               xfs_btree_reada_bufs(cur->bc_mp, cur->bc_ag.agno,
                                     left, 1, cur->bc_ops->buf_ops);
                rval++;
        }
 
        if ((lr & XFS_BTCUR_RIGHTRA) && right != NULLAGBLOCK) {
-               xfs_btree_reada_bufs(cur->bc_mp, cur->bc_private.a.agno,
+               xfs_btree_reada_bufs(cur->bc_mp, cur->bc_ag.agno,
                                     right, 1, cur->bc_ops->buf_ops);
                rval++;
        }
                *daddr = XFS_FSB_TO_DADDR(cur->bc_mp, fsbno);
        } else {
                agbno = be32_to_cpu(ptr->s);
-               *daddr = XFS_AGB_TO_DADDR(cur->bc_mp, cur->bc_private.a.agno,
+               *daddr = XFS_AGB_TO_DADDR(cur->bc_mp, cur->bc_ag.agno,
                                agbno);
        }
 
        if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
                owner = cur->bc_private.b.ip->i_ino;
        else
-               owner = cur->bc_private.a.agno;
+               owner = cur->bc_ag.agno;
 
        xfs_btree_init_block_int(cur->bc_mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn,
                                 cur->bc_btnum, level, numrecs,
 
        int                             *stat)
 {
        struct xfs_mount                *mp = cur->bc_mp;
-       xfs_agnumber_t                  agno = cur->bc_private.a.agno;
+       xfs_agnumber_t                  agno = cur->bc_ag.agno;
        union xfs_btree_rec             *rec;
        int                             error;
        uint64_t                        realfree;
 
        struct xfs_btree_cur    *cur)
 {
        return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp,
-                       cur->bc_private.a.agbp, cur->bc_private.a.agno,
+                       cur->bc_ag.agbp, cur->bc_ag.agno,
                        cur->bc_btnum);
 }
 
        union xfs_btree_ptr     *nptr,
        int                     inc)    /* level change */
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agi          *agi = agbp->b_addr;
 
        agi->agi_root = nptr->s;
        union xfs_btree_ptr     *nptr,
        int                     inc)    /* level change */
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agi          *agi = agbp->b_addr;
 
        agi->agi_free_root = nptr->s;
        args.tp = cur->bc_tp;
        args.mp = cur->bc_mp;
        args.oinfo = XFS_RMAP_OINFO_INOBT;
-       args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno);
+       args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_ag.agno, sbno);
        args.minlen = 1;
        args.maxlen = 1;
        args.prod = 1;
        struct xfs_btree_cur    *cur,
        union xfs_btree_ptr     *ptr)
 {
-       struct xfs_agi          *agi = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agi          *agi = cur->bc_ag.agbp->b_addr;
 
-       ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
+       ASSERT(cur->bc_ag.agno == be32_to_cpu(agi->agi_seqno));
 
        ptr->s = agi->agi_root;
 }
        struct xfs_btree_cur    *cur,
        union xfs_btree_ptr     *ptr)
 {
-       struct xfs_agi          *agi = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agi          *agi = cur->bc_ag.agbp->b_addr;
 
-       ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
+       ASSERT(cur->bc_ag.agno == be32_to_cpu(agi->agi_seqno));
        ptr->s = agi->agi_free_root;
 }
 
        if (xfs_sb_version_hascrc(&mp->m_sb))
                cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
 
-       cur->bc_private.a.agbp = agbp;
-       cur->bc_private.a.agno = agno;
+       cur->bc_ag.agbp = agbp;
+       cur->bc_ag.agno = agno;
 
        return cur;
 }
 
        xfs_agblock_t           bno,
        int                     *stat)
 {
-       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_private.a.agno, bno,
+       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_ag.agno, bno,
                        XFS_LOOKUP_LE);
        cur->bc_rec.rc.rc_startblock = bno;
        cur->bc_rec.rc.rc_blockcount = 0;
        xfs_agblock_t           bno,
        int                     *stat)
 {
-       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_private.a.agno, bno,
+       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_ag.agno, bno,
                        XFS_LOOKUP_GE);
        cur->bc_rec.rc.rc_startblock = bno;
        cur->bc_rec.rc.rc_blockcount = 0;
        xfs_agblock_t           bno,
        int                     *stat)
 {
-       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_private.a.agno, bno,
+       trace_xfs_refcount_lookup(cur->bc_mp, cur->bc_ag.agno, bno,
                        XFS_LOOKUP_LE);
        cur->bc_rec.rc.rc_startblock = bno;
        cur->bc_rec.rc.rc_blockcount = 0;
        int                             *stat)
 {
        struct xfs_mount                *mp = cur->bc_mp;
-       xfs_agnumber_t                  agno = cur->bc_private.a.agno;
+       xfs_agnumber_t                  agno = cur->bc_ag.agno;
        union xfs_btree_rec             *rec;
        int                             error;
        xfs_agblock_t                   realstart;
 
        xfs_refcount_btrec_to_irec(rec, irec);
 
-       agno = cur->bc_private.a.agno;
+       agno = cur->bc_ag.agno;
        if (irec->rc_blockcount == 0 || irec->rc_blockcount > MAXREFCEXTLEN)
                goto out_bad_rec;
 
        if (irec->rc_refcount == 0 || irec->rc_refcount > MAXREFCOUNT)
                goto out_bad_rec;
 
-       trace_xfs_refcount_get(cur->bc_mp, cur->bc_private.a.agno, irec);
+       trace_xfs_refcount_get(cur->bc_mp, cur->bc_ag.agno, irec);
        return 0;
 
 out_bad_rec:
        union xfs_btree_rec     rec;
        int                     error;
 
-       trace_xfs_refcount_update(cur->bc_mp, cur->bc_private.a.agno, irec);
+       trace_xfs_refcount_update(cur->bc_mp, cur->bc_ag.agno, irec);
        rec.refc.rc_startblock = cpu_to_be32(irec->rc_startblock);
        rec.refc.rc_blockcount = cpu_to_be32(irec->rc_blockcount);
        rec.refc.rc_refcount = cpu_to_be32(irec->rc_refcount);
        error = xfs_btree_update(cur, &rec);
        if (error)
                trace_xfs_refcount_update_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
 {
        int                             error;
 
-       trace_xfs_refcount_insert(cur->bc_mp, cur->bc_private.a.agno, irec);
+       trace_xfs_refcount_insert(cur->bc_mp, cur->bc_ag.agno, irec);
        cur->bc_rec.rc.rc_startblock = irec->rc_startblock;
        cur->bc_rec.rc.rc_blockcount = irec->rc_blockcount;
        cur->bc_rec.rc.rc_refcount = irec->rc_refcount;
 out_error:
        if (error)
                trace_xfs_refcount_insert_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                error = -EFSCORRUPTED;
                goto out_error;
        }
-       trace_xfs_refcount_delete(cur->bc_mp, cur->bc_private.a.agno, &irec);
+       trace_xfs_refcount_delete(cur->bc_mp, cur->bc_ag.agno, &irec);
        error = xfs_btree_delete(cur, i);
        if (XFS_IS_CORRUPT(cur->bc_mp, *i != 1)) {
                error = -EFSCORRUPTED;
 out_error:
        if (error)
                trace_xfs_refcount_delete_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                return 0;
 
        *shape_changed = true;
-       trace_xfs_refcount_split_extent(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_split_extent(cur->bc_mp, cur->bc_ag.agno,
                        &rcext, agbno);
 
        /* Establish the right extent. */
 
 out_error:
        trace_xfs_refcount_split_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                             found_rec;
 
        trace_xfs_refcount_merge_center_extents(cur->bc_mp,
-                       cur->bc_private.a.agno, left, center, right);
+                       cur->bc_ag.agno, left, center, right);
 
        /*
         * Make sure the center and right extents are not in the btree.
 
 out_error:
        trace_xfs_refcount_merge_center_extents_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                             found_rec;
 
        trace_xfs_refcount_merge_left_extent(cur->bc_mp,
-                       cur->bc_private.a.agno, left, cleft);
+                       cur->bc_ag.agno, left, cleft);
 
        /* If the extent at agbno (cleft) wasn't synthesized, remove it. */
        if (cleft->rc_refcount > 1) {
 
 out_error:
        trace_xfs_refcount_merge_left_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                             found_rec;
 
        trace_xfs_refcount_merge_right_extent(cur->bc_mp,
-                       cur->bc_private.a.agno, cright, right);
+                       cur->bc_ag.agno, cright, right);
 
        /*
         * If the extent ending at agbno+aglen (cright) wasn't synthesized,
 
 out_error:
        trace_xfs_refcount_merge_right_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                cleft->rc_blockcount = aglen;
                cleft->rc_refcount = 1;
        }
-       trace_xfs_refcount_find_left_extent(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_find_left_extent(cur->bc_mp, cur->bc_ag.agno,
                        left, cleft, agbno);
        return error;
 
 out_error:
        trace_xfs_refcount_find_left_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                cright->rc_blockcount = aglen;
                cright->rc_refcount = 1;
        }
-       trace_xfs_refcount_find_right_extent(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_find_right_extent(cur->bc_mp, cur->bc_ag.agno,
                        cright, right, agbno + aglen);
        return error;
 
 out_error:
        trace_xfs_refcount_find_right_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
 {
        unsigned long                   overhead;
 
-       overhead = cur->bc_private.a.priv.refc.shape_changes *
+       overhead = cur->bc_ag.priv.refc.shape_changes *
                        xfs_allocfree_log_count(cur->bc_mp, 1);
        overhead *= cur->bc_mp->m_sb.sb_blocksize;
 
         * Only allow 2 refcount extent updates per transaction if the
         * refcount continue update "error" has been injected.
         */
-       if (cur->bc_private.a.priv.refc.nr_ops > 2 &&
+       if (cur->bc_ag.priv.refc.nr_ops > 2 &&
            XFS_TEST_ERROR(false, cur->bc_mp,
                        XFS_ERRTAG_REFCOUNT_CONTINUE_UPDATE))
                return false;
 
-       if (cur->bc_private.a.priv.refc.nr_ops == 0)
+       if (cur->bc_ag.priv.refc.nr_ops == 0)
                return true;
        else if (overhead > cur->bc_tp->t_log_res)
                return false;
        return  cur->bc_tp->t_log_res - overhead >
-               cur->bc_private.a.priv.refc.nr_ops * XFS_REFCOUNT_ITEM_OVERHEAD;
+               cur->bc_ag.priv.refc.nr_ops * XFS_REFCOUNT_ITEM_OVERHEAD;
 }
 
 /*
                                        ext.rc_startblock - *agbno);
                        tmp.rc_refcount = 1 + adj;
                        trace_xfs_refcount_modify_extent(cur->bc_mp,
-                                       cur->bc_private.a.agno, &tmp);
+                                       cur->bc_ag.agno, &tmp);
 
                        /*
                         * Either cover the hole (increment) or
                                        error = -EFSCORRUPTED;
                                        goto out_error;
                                }
-                               cur->bc_private.a.priv.refc.nr_ops++;
+                               cur->bc_ag.priv.refc.nr_ops++;
                        } else {
                                fsbno = XFS_AGB_TO_FSB(cur->bc_mp,
-                                               cur->bc_private.a.agno,
+                                               cur->bc_ag.agno,
                                                tmp.rc_startblock);
                                xfs_bmap_add_free(cur->bc_tp, fsbno,
                                                  tmp.rc_blockcount, oinfo);
                        goto skip;
                ext.rc_refcount += adj;
                trace_xfs_refcount_modify_extent(cur->bc_mp,
-                               cur->bc_private.a.agno, &ext);
+                               cur->bc_ag.agno, &ext);
                if (ext.rc_refcount > 1) {
                        error = xfs_refcount_update(cur, &ext);
                        if (error)
                                goto out_error;
-                       cur->bc_private.a.priv.refc.nr_ops++;
+                       cur->bc_ag.priv.refc.nr_ops++;
                } else if (ext.rc_refcount == 1) {
                        error = xfs_refcount_delete(cur, &found_rec);
                        if (error)
                                error = -EFSCORRUPTED;
                                goto out_error;
                        }
-                       cur->bc_private.a.priv.refc.nr_ops++;
+                       cur->bc_ag.priv.refc.nr_ops++;
                        goto advloop;
                } else {
                        fsbno = XFS_AGB_TO_FSB(cur->bc_mp,
-                                       cur->bc_private.a.agno,
+                                       cur->bc_ag.agno,
                                        ext.rc_startblock);
                        xfs_bmap_add_free(cur->bc_tp, fsbno, ext.rc_blockcount,
                                          oinfo);
        return error;
 out_error:
        trace_xfs_refcount_modify_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        *new_agbno = agbno;
        *new_aglen = aglen;
        if (adj == XFS_REFCOUNT_ADJUST_INCREASE)
-               trace_xfs_refcount_increase(cur->bc_mp, cur->bc_private.a.agno,
+               trace_xfs_refcount_increase(cur->bc_mp, cur->bc_ag.agno,
                                agbno, aglen);
        else
-               trace_xfs_refcount_decrease(cur->bc_mp, cur->bc_private.a.agno,
+               trace_xfs_refcount_decrease(cur->bc_mp, cur->bc_ag.agno,
                                agbno, aglen);
 
        /*
        if (shape_changed)
                shape_changes++;
        if (shape_changes)
-               cur->bc_private.a.priv.refc.shape_changes++;
+               cur->bc_ag.priv.refc.shape_changes++;
 
        /* Now that we've taken care of the ends, adjust the middle extents */
        error = xfs_refcount_adjust_extents(cur, new_agbno, new_aglen,
        return 0;
 
 out_error:
-       trace_xfs_refcount_adjust_error(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_adjust_error(cur->bc_mp, cur->bc_ag.agno,
                        error, _RET_IP_);
        return error;
 }
 
        if (rcur == NULL)
                return;
-       agbp = rcur->bc_private.a.agbp;
+       agbp = rcur->bc_ag.agbp;
        xfs_btree_del_cursor(rcur, error);
        if (error)
                xfs_trans_brelse(tp, agbp);
         * the startblock, get one now.
         */
        rcur = *pcur;
-       if (rcur != NULL && rcur->bc_private.a.agno != agno) {
-               nr_ops = rcur->bc_private.a.priv.refc.nr_ops;
-               shape_changes = rcur->bc_private.a.priv.refc.shape_changes;
+       if (rcur != NULL && rcur->bc_ag.agno != agno) {
+               nr_ops = rcur->bc_ag.priv.refc.nr_ops;
+               shape_changes = rcur->bc_ag.priv.refc.shape_changes;
                xfs_refcount_finish_one_cleanup(tp, rcur, 0);
                rcur = NULL;
                *pcur = NULL;
                        error = -ENOMEM;
                        goto out_cur;
                }
-               rcur->bc_private.a.priv.refc.nr_ops = nr_ops;
-               rcur->bc_private.a.priv.refc.shape_changes = shape_changes;
+               rcur->bc_ag.priv.refc.nr_ops = nr_ops;
+               rcur->bc_ag.priv.refc.shape_changes = shape_changes;
        }
        *pcur = rcur;
 
        int                             have;
        int                             error;
 
-       trace_xfs_refcount_find_shared(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_find_shared(cur->bc_mp, cur->bc_ag.agno,
                        agbno, aglen);
 
        /* By default, skip the whole range */
 
 done:
        trace_xfs_refcount_find_shared_result(cur->bc_mp,
-                       cur->bc_private.a.agno, *fbno, *flen);
+                       cur->bc_ag.agno, *fbno, *flen);
 
 out_error:
        if (error)
                trace_xfs_refcount_find_shared_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                tmp.rc_blockcount = aglen;
                tmp.rc_refcount = 1;
                trace_xfs_refcount_modify_extent(cur->bc_mp,
-                               cur->bc_private.a.agno, &tmp);
+                               cur->bc_ag.agno, &tmp);
 
                error = xfs_refcount_insert(cur, &tmp,
                                &found_tmp);
 
                ext.rc_refcount = 0;
                trace_xfs_refcount_modify_extent(cur->bc_mp,
-                               cur->bc_private.a.agno, &ext);
+                               cur->bc_ag.agno, &ext);
                error = xfs_refcount_delete(cur, &found_rec);
                if (error)
                        goto out_error;
        return error;
 out_error:
        trace_xfs_refcount_modify_extent_error(cur->bc_mp,
-                       cur->bc_private.a.agno, error, _RET_IP_);
+                       cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        return 0;
 
 out_error:
-       trace_xfs_refcount_adjust_cow_error(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcount_adjust_cow_error(cur->bc_mp, cur->bc_ag.agno,
                        error, _RET_IP_);
        return error;
 }
        xfs_agblock_t           agbno,
        xfs_extlen_t            aglen)
 {
-       trace_xfs_refcount_cow_increase(rcur->bc_mp, rcur->bc_private.a.agno,
+       trace_xfs_refcount_cow_increase(rcur->bc_mp, rcur->bc_ag.agno,
                        agbno, aglen);
 
        /* Add refcount btree reservation */
        xfs_agblock_t           agbno,
        xfs_extlen_t            aglen)
 {
-       trace_xfs_refcount_cow_decrease(rcur->bc_mp, rcur->bc_private.a.agno,
+       trace_xfs_refcount_cow_decrease(rcur->bc_mp, rcur->bc_ag.agno,
                        agbno, aglen);
 
        /* Remove refcount btree reservation */
 
        struct xfs_btree_cur    *cur)
 {
        return xfs_refcountbt_init_cursor(cur->bc_mp, cur->bc_tp,
-                       cur->bc_private.a.agbp, cur->bc_private.a.agno);
+                       cur->bc_ag.agbp, cur->bc_ag.agno);
 }
 
 STATIC void
        union xfs_btree_ptr     *ptr,
        int                     inc)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
        struct xfs_perag        *pag = xfs_perag_get(cur->bc_mp, seqno);
        union xfs_btree_ptr     *new,
        int                     *stat)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        struct xfs_alloc_arg    args;           /* block allocation args */
        int                     error;          /* error return value */
        args.tp = cur->bc_tp;
        args.mp = cur->bc_mp;
        args.type = XFS_ALLOCTYPE_NEAR_BNO;
-       args.fsbno = XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_private.a.agno,
+       args.fsbno = XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_ag.agno,
                        xfs_refc_block(args.mp));
        args.oinfo = XFS_RMAP_OINFO_REFC;
        args.minlen = args.maxlen = args.prod = 1;
        error = xfs_alloc_vextent(&args);
        if (error)
                goto out_error;
-       trace_xfs_refcountbt_alloc_block(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcountbt_alloc_block(cur->bc_mp, cur->bc_ag.agno,
                        args.agbno, 1);
        if (args.fsbno == NULLFSBLOCK) {
                *stat = 0;
                return 0;
        }
-       ASSERT(args.agno == cur->bc_private.a.agno);
+       ASSERT(args.agno == cur->bc_ag.agno);
        ASSERT(args.len == 1);
 
        new->s = cpu_to_be32(args.agbno);
        struct xfs_buf          *bp)
 {
        struct xfs_mount        *mp = cur->bc_mp;
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_fsblock_t           fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp));
        int                     error;
 
-       trace_xfs_refcountbt_free_block(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_refcountbt_free_block(cur->bc_mp, cur->bc_ag.agno,
                        XFS_FSB_TO_AGBNO(cur->bc_mp, fsbno), 1);
        be32_add_cpu(&agf->agf_refcount_blocks, -1);
        xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_REFCOUNT_BLOCKS);
        struct xfs_btree_cur    *cur,
        union xfs_btree_ptr     *ptr)
 {
-       struct xfs_agf          *agf = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agf          *agf = cur->bc_ag.agbp->b_addr;
 
-       ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
+       ASSERT(cur->bc_ag.agno == be32_to_cpu(agf->agf_seqno));
 
        ptr->s = agf->agf_refcount_root;
 }
 
        cur->bc_nlevels = be32_to_cpu(agf->agf_refcount_level);
 
-       cur->bc_private.a.agbp = agbp;
-       cur->bc_private.a.agno = agno;
+       cur->bc_ag.agbp = agbp;
+       cur->bc_ag.agno = agno;
        cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
 
-       cur->bc_private.a.priv.refc.nr_ops = 0;
-       cur->bc_private.a.priv.refc.shape_changes = 0;
+       cur->bc_ag.priv.refc.nr_ops = 0;
+       cur->bc_ag.priv.refc.shape_changes = 0;
 
        return cur;
 }
 
        union xfs_btree_rec     rec;
        int                     error;
 
-       trace_xfs_rmap_update(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_rmap_update(cur->bc_mp, cur->bc_ag.agno,
                        irec->rm_startblock, irec->rm_blockcount,
                        irec->rm_owner, irec->rm_offset, irec->rm_flags);
 
        error = xfs_btree_update(cur, &rec);
        if (error)
                trace_xfs_rmap_update_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                     i;
        int                     error;
 
-       trace_xfs_rmap_insert(rcur->bc_mp, rcur->bc_private.a.agno, agbno,
+       trace_xfs_rmap_insert(rcur->bc_mp, rcur->bc_ag.agno, agbno,
                        len, owner, offset, flags);
 
        error = xfs_rmap_lookup_eq(rcur, agbno, len, owner, offset, flags, &i);
 done:
        if (error)
                trace_xfs_rmap_insert_error(rcur->bc_mp,
-                               rcur->bc_private.a.agno, error, _RET_IP_);
+                               rcur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                     i;
        int                     error;
 
-       trace_xfs_rmap_delete(rcur->bc_mp, rcur->bc_private.a.agno, agbno,
+       trace_xfs_rmap_delete(rcur->bc_mp, rcur->bc_ag.agno, agbno,
                        len, owner, offset, flags);
 
        error = xfs_rmap_lookup_eq(rcur, agbno, len, owner, offset, flags, &i);
 done:
        if (error)
                trace_xfs_rmap_delete_error(rcur->bc_mp,
-                               rcur->bc_private.a.agno, error, _RET_IP_);
+                               rcur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        int                     *stat)
 {
        struct xfs_mount        *mp = cur->bc_mp;
-       xfs_agnumber_t          agno = cur->bc_private.a.agno;
+       xfs_agnumber_t          agno = cur->bc_ag.agno;
        union xfs_btree_rec     *rec;
        int                     error;
 
        struct xfs_find_left_neighbor_info      *info = priv;
 
        trace_xfs_rmap_find_left_neighbor_candidate(cur->bc_mp,
-                       cur->bc_private.a.agno, rec->rm_startblock,
+                       cur->bc_ag.agno, rec->rm_startblock,
                        rec->rm_blockcount, rec->rm_owner, rec->rm_offset,
                        rec->rm_flags);
 
        info.stat = stat;
 
        trace_xfs_rmap_find_left_neighbor_query(cur->bc_mp,
-                       cur->bc_private.a.agno, bno, 0, owner, offset, flags);
+                       cur->bc_ag.agno, bno, 0, owner, offset, flags);
 
        error = xfs_rmap_query_range(cur, &info.high, &info.high,
                        xfs_rmap_find_left_neighbor_helper, &info);
                error = 0;
        if (*stat)
                trace_xfs_rmap_find_left_neighbor_result(cur->bc_mp,
-                               cur->bc_private.a.agno, irec->rm_startblock,
+                               cur->bc_ag.agno, irec->rm_startblock,
                                irec->rm_blockcount, irec->rm_owner,
                                irec->rm_offset, irec->rm_flags);
        return error;
        struct xfs_find_left_neighbor_info      *info = priv;
 
        trace_xfs_rmap_lookup_le_range_candidate(cur->bc_mp,
-                       cur->bc_private.a.agno, rec->rm_startblock,
+                       cur->bc_ag.agno, rec->rm_startblock,
                        rec->rm_blockcount, rec->rm_owner, rec->rm_offset,
                        rec->rm_flags);
 
        info.stat = stat;
 
        trace_xfs_rmap_lookup_le_range(cur->bc_mp,
-                       cur->bc_private.a.agno, bno, 0, owner, offset, flags);
+                       cur->bc_ag.agno, bno, 0, owner, offset, flags);
        error = xfs_rmap_query_range(cur, &info.high, &info.high,
                        xfs_rmap_lookup_le_range_helper, &info);
        if (error == -ECANCELED)
                error = 0;
        if (*stat)
                trace_xfs_rmap_lookup_le_range_result(cur->bc_mp,
-                               cur->bc_private.a.agno, irec->rm_startblock,
+                               cur->bc_ag.agno, irec->rm_startblock,
                                irec->rm_blockcount, irec->rm_owner,
                                irec->rm_offset, irec->rm_flags);
        return error;
                        (flags & XFS_RMAP_BMBT_BLOCK);
        if (unwritten)
                flags |= XFS_RMAP_UNWRITTEN;
-       trace_xfs_rmap_unmap(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_unmap(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 
        /*
                goto out_error;
        }
        trace_xfs_rmap_lookup_le_range_result(cur->bc_mp,
-                       cur->bc_private.a.agno, ltrec.rm_startblock,
+                       cur->bc_ag.agno, ltrec.rm_startblock,
                        ltrec.rm_blockcount, ltrec.rm_owner,
                        ltrec.rm_offset, ltrec.rm_flags);
        ltoff = ltrec.rm_offset;
 
        if (ltrec.rm_startblock == bno && ltrec.rm_blockcount == len) {
                /* exact match, simply remove the record from rmap tree */
-               trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                ltrec.rm_startblock, ltrec.rm_blockcount,
                                ltrec.rm_owner, ltrec.rm_offset,
                                ltrec.rm_flags);
                else
                        cur->bc_rec.r.rm_offset = offset + len;
                cur->bc_rec.r.rm_flags = flags;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno,
                                cur->bc_rec.r.rm_startblock,
                                cur->bc_rec.r.rm_blockcount,
                                cur->bc_rec.r.rm_owner,
        }
 
 out_done:
-       trace_xfs_rmap_unmap_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_unmap_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 out_error:
        if (error)
-               trace_xfs_rmap_unmap_error(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_unmap_error(mp, cur->bc_ag.agno,
                                error, _RET_IP_);
        return error;
 }
                        (flags & XFS_RMAP_BMBT_BLOCK);
        if (unwritten)
                flags |= XFS_RMAP_UNWRITTEN;
-       trace_xfs_rmap_map(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_map(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
        ASSERT(!xfs_rmap_should_skip_owner_update(oinfo));
 
                        goto out_error;
                }
                trace_xfs_rmap_lookup_le_range_result(cur->bc_mp,
-                               cur->bc_private.a.agno, ltrec.rm_startblock,
+                               cur->bc_ag.agno, ltrec.rm_startblock,
                                ltrec.rm_blockcount, ltrec.rm_owner,
                                ltrec.rm_offset, ltrec.rm_flags);
 
                        goto out_error;
                }
                trace_xfs_rmap_find_right_neighbor_result(cur->bc_mp,
-                       cur->bc_private.a.agno, gtrec.rm_startblock,
+                       cur->bc_ag.agno, gtrec.rm_startblock,
                        gtrec.rm_blockcount, gtrec.rm_owner,
                        gtrec.rm_offset, gtrec.rm_flags);
                if (!xfs_rmap_is_mergeable(>rec, owner, flags))
                         * result: |rrrrrrrrrrrrrrrrrrrrrrrrrrrrr|
                         */
                        ltrec.rm_blockcount += gtrec.rm_blockcount;
-                       trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+                       trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                        gtrec.rm_startblock,
                                        gtrec.rm_blockcount,
                                        gtrec.rm_owner,
                cur->bc_rec.r.rm_owner = owner;
                cur->bc_rec.r.rm_offset = offset;
                cur->bc_rec.r.rm_flags = flags;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno, bno, len,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno, bno, len,
                        owner, offset, flags);
                error = xfs_btree_insert(cur, &i);
                if (error)
                }
        }
 
-       trace_xfs_rmap_map_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_map_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 out_error:
        if (error)
-               trace_xfs_rmap_map_error(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_map_error(mp, cur->bc_ag.agno,
                                error, _RET_IP_);
        return error;
 }
                        (flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))));
        oldext = unwritten ? XFS_RMAP_UNWRITTEN : 0;
        new_endoff = offset + len;
-       trace_xfs_rmap_convert(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_convert(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 
        /*
                goto done;
        }
        trace_xfs_rmap_lookup_le_range_result(cur->bc_mp,
-                       cur->bc_private.a.agno, PREV.rm_startblock,
+                       cur->bc_ag.agno, PREV.rm_startblock,
                        PREV.rm_blockcount, PREV.rm_owner,
                        PREV.rm_offset, PREV.rm_flags);
 
                        goto done;
                }
                trace_xfs_rmap_find_left_neighbor_result(cur->bc_mp,
-                               cur->bc_private.a.agno, LEFT.rm_startblock,
+                               cur->bc_ag.agno, LEFT.rm_startblock,
                                LEFT.rm_blockcount, LEFT.rm_owner,
                                LEFT.rm_offset, LEFT.rm_flags);
                if (LEFT.rm_startblock + LEFT.rm_blockcount == bno &&
                        goto done;
                }
                trace_xfs_rmap_find_right_neighbor_result(cur->bc_mp,
-                               cur->bc_private.a.agno, RIGHT.rm_startblock,
+                               cur->bc_ag.agno, RIGHT.rm_startblock,
                                RIGHT.rm_blockcount, RIGHT.rm_owner,
                                RIGHT.rm_offset, RIGHT.rm_flags);
                if (bno + len == RIGHT.rm_startblock &&
             RIGHT.rm_blockcount > XFS_RMAP_LEN_MAX)
                state &= ~RMAP_RIGHT_CONTIG;
 
-       trace_xfs_rmap_convert_state(mp, cur->bc_private.a.agno, state,
+       trace_xfs_rmap_convert_state(mp, cur->bc_ag.agno, state,
                        _RET_IP_);
 
        /* reset the cursor back to PREV */
                        error = -EFSCORRUPTED;
                        goto done;
                }
-               trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                RIGHT.rm_startblock, RIGHT.rm_blockcount,
                                RIGHT.rm_owner, RIGHT.rm_offset,
                                RIGHT.rm_flags);
                        error = -EFSCORRUPTED;
                        goto done;
                }
-               trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                PREV.rm_startblock, PREV.rm_blockcount,
                                PREV.rm_owner, PREV.rm_offset,
                                PREV.rm_flags);
                 * Setting all of a previous oldext extent to newext.
                 * The left neighbor is contiguous, the right is not.
                 */
-               trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                PREV.rm_startblock, PREV.rm_blockcount,
                                PREV.rm_owner, PREV.rm_offset,
                                PREV.rm_flags);
                        error = -EFSCORRUPTED;
                        goto done;
                }
-               trace_xfs_rmap_delete(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_delete(mp, cur->bc_ag.agno,
                                RIGHT.rm_startblock, RIGHT.rm_blockcount,
                                RIGHT.rm_owner, RIGHT.rm_offset,
                                RIGHT.rm_flags);
                NEW.rm_blockcount = len;
                NEW.rm_flags = newext;
                cur->bc_rec.r = NEW;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno, bno,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno, bno,
                                len, owner, offset, newext);
                error = xfs_btree_insert(cur, &i);
                if (error)
                NEW.rm_blockcount = len;
                NEW.rm_flags = newext;
                cur->bc_rec.r = NEW;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno, bno,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno, bno,
                                len, owner, offset, newext);
                error = xfs_btree_insert(cur, &i);
                if (error)
                NEW = PREV;
                NEW.rm_blockcount = offset - PREV.rm_offset;
                cur->bc_rec.r = NEW;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno,
                                NEW.rm_startblock, NEW.rm_blockcount,
                                NEW.rm_owner, NEW.rm_offset,
                                NEW.rm_flags);
                /* new middle extent - newext */
                cur->bc_rec.r.rm_flags &= ~XFS_RMAP_UNWRITTEN;
                cur->bc_rec.r.rm_flags |= newext;
-               trace_xfs_rmap_insert(mp, cur->bc_private.a.agno, bno, len,
+               trace_xfs_rmap_insert(mp, cur->bc_ag.agno, bno, len,
                                owner, offset, newext);
                error = xfs_btree_insert(cur, &i);
                if (error)
                ASSERT(0);
        }
 
-       trace_xfs_rmap_convert_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_convert_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 done:
        if (error)
                trace_xfs_rmap_convert_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
                        (flags & (XFS_RMAP_ATTR_FORK | XFS_RMAP_BMBT_BLOCK))));
        oldext = unwritten ? XFS_RMAP_UNWRITTEN : 0;
        new_endoff = offset + len;
-       trace_xfs_rmap_convert(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_convert(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 
        /*
                        goto done;
                }
                trace_xfs_rmap_find_right_neighbor_result(cur->bc_mp,
-                               cur->bc_private.a.agno, RIGHT.rm_startblock,
+                               cur->bc_ag.agno, RIGHT.rm_startblock,
                                RIGHT.rm_blockcount, RIGHT.rm_owner,
                                RIGHT.rm_offset, RIGHT.rm_flags);
                if (xfs_rmap_is_mergeable(&RIGHT, owner, newext))
             RIGHT.rm_blockcount > XFS_RMAP_LEN_MAX)
                state &= ~RMAP_RIGHT_CONTIG;
 
-       trace_xfs_rmap_convert_state(mp, cur->bc_private.a.agno, state,
+       trace_xfs_rmap_convert_state(mp, cur->bc_ag.agno, state,
                        _RET_IP_);
        /*
         * Switch out based on the FILLING and CONTIG state bits.
                ASSERT(0);
        }
 
-       trace_xfs_rmap_convert_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_convert_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 done:
        if (error)
                trace_xfs_rmap_convert_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        xfs_owner_info_unpack(oinfo, &owner, &offset, &flags);
        if (unwritten)
                flags |= XFS_RMAP_UNWRITTEN;
-       trace_xfs_rmap_unmap(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_unmap(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 
        /*
                        goto out_error;
        }
 
-       trace_xfs_rmap_unmap_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_unmap_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 out_error:
        if (error)
                trace_xfs_rmap_unmap_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
        xfs_owner_info_unpack(oinfo, &owner, &offset, &flags);
        if (unwritten)
                flags |= XFS_RMAP_UNWRITTEN;
-       trace_xfs_rmap_map(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_map(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 
        /* Is there a left record that abuts our range? */
                        goto out_error;
                }
                trace_xfs_rmap_find_right_neighbor_result(cur->bc_mp,
-                       cur->bc_private.a.agno, gtrec.rm_startblock,
+                       cur->bc_ag.agno, gtrec.rm_startblock,
                        gtrec.rm_blockcount, gtrec.rm_owner,
                        gtrec.rm_offset, gtrec.rm_flags);
 
                        goto out_error;
        }
 
-       trace_xfs_rmap_map_done(mp, cur->bc_private.a.agno, bno, len,
+       trace_xfs_rmap_map_done(mp, cur->bc_ag.agno, bno, len,
                        unwritten, oinfo);
 out_error:
        if (error)
                trace_xfs_rmap_map_error(cur->bc_mp,
-                               cur->bc_private.a.agno, error, _RET_IP_);
+                               cur->bc_ag.agno, error, _RET_IP_);
        return error;
 }
 
 
        if (rcur == NULL)
                return;
-       agbp = rcur->bc_private.a.agbp;
+       agbp = rcur->bc_ag.agbp;
        xfs_btree_del_cursor(rcur, error);
        if (error)
                xfs_trans_brelse(tp, agbp);
         * the startblock, get one now.
         */
        rcur = *pcur;
-       if (rcur != NULL && rcur->bc_private.a.agno != agno) {
+       if (rcur != NULL && rcur->bc_ag.agno != agno) {
                xfs_rmap_finish_one_cleanup(tp, rcur, 0);
                rcur = NULL;
                *pcur = NULL;
 
        struct xfs_btree_cur    *cur)
 {
        return xfs_rmapbt_init_cursor(cur->bc_mp, cur->bc_tp,
-                       cur->bc_private.a.agbp, cur->bc_private.a.agno);
+                       cur->bc_ag.agbp, cur->bc_ag.agno);
 }
 
 STATIC void
        union xfs_btree_ptr     *ptr,
        int                     inc)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_agnumber_t          seqno = be32_to_cpu(agf->agf_seqno);
        int                     btnum = cur->bc_btnum;
        union xfs_btree_ptr     *new,
        int                     *stat)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        int                     error;
        xfs_agblock_t           bno;
 
        /* Allocate the new block from the freelist. If we can't, give up.  */
-       error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_private.a.agbp,
+       error = xfs_alloc_get_freelist(cur->bc_tp, cur->bc_ag.agbp,
                                       &bno, 1);
        if (error)
                return error;
 
-       trace_xfs_rmapbt_alloc_block(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_rmapbt_alloc_block(cur->bc_mp, cur->bc_ag.agno,
                        bno, 1);
        if (bno == NULLAGBLOCK) {
                *stat = 0;
                return 0;
        }
 
-       xfs_extent_busy_reuse(cur->bc_mp, cur->bc_private.a.agno, bno, 1,
+       xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agno, bno, 1,
                        false);
 
        xfs_trans_agbtree_delta(cur->bc_tp, 1);
        be32_add_cpu(&agf->agf_rmap_blocks, 1);
        xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_RMAP_BLOCKS);
 
-       xfs_ag_resv_rmapbt_alloc(cur->bc_mp, cur->bc_private.a.agno);
+       xfs_ag_resv_rmapbt_alloc(cur->bc_mp, cur->bc_ag.agno);
 
        *stat = 1;
        return 0;
        struct xfs_btree_cur    *cur,
        struct xfs_buf          *bp)
 {
-       struct xfs_buf          *agbp = cur->bc_private.a.agbp;
+       struct xfs_buf          *agbp = cur->bc_ag.agbp;
        struct xfs_agf          *agf = agbp->b_addr;
        xfs_agblock_t           bno;
        int                     error;
 
        bno = xfs_daddr_to_agbno(cur->bc_mp, XFS_BUF_ADDR(bp));
-       trace_xfs_rmapbt_free_block(cur->bc_mp, cur->bc_private.a.agno,
+       trace_xfs_rmapbt_free_block(cur->bc_mp, cur->bc_ag.agno,
                        bno, 1);
        be32_add_cpu(&agf->agf_rmap_blocks, -1);
        xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_RMAP_BLOCKS);
                              XFS_EXTENT_BUSY_SKIP_DISCARD);
        xfs_trans_agbtree_delta(cur->bc_tp, -1);
 
-       xfs_ag_resv_rmapbt_free(cur->bc_mp, cur->bc_private.a.agno);
+       xfs_ag_resv_rmapbt_free(cur->bc_mp, cur->bc_ag.agno);
 
        return 0;
 }
        struct xfs_btree_cur    *cur,
        union xfs_btree_ptr     *ptr)
 {
-       struct xfs_agf          *agf = cur->bc_private.a.agbp->b_addr;
+       struct xfs_agf          *agf = cur->bc_ag.agbp->b_addr;
 
-       ASSERT(cur->bc_private.a.agno == be32_to_cpu(agf->agf_seqno));
+       ASSERT(cur->bc_ag.agno == be32_to_cpu(agf->agf_seqno));
 
        ptr->s = agf->agf_roots[cur->bc_btnum];
 }
        cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]);
        cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_rmap_2);
 
-       cur->bc_private.a.agbp = agbp;
-       cur->bc_private.a.agno = agno;
+       cur->bc_ag.agbp = agbp;
+       cur->bc_ag.agno = agno;
 
        return cur;
 }
 
 
        /* Record all the OWN_AG blocks. */
        if (rec->rm_owner == XFS_RMAP_OWN_AG) {
-               fsb = XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_private.a.agno,
+               fsb = XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_ag.agno,
                                rec->rm_startblock);
                error = xfs_bitmap_set(ra->freesp, fsb, rec->rm_blockcount);
                if (error)
 
        union xfs_btree_rec     *rec)
 {
        struct xfs_mount        *mp = bs->cur->bc_mp;
-       xfs_agnumber_t          agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t          agno = bs->cur->bc_ag.agno;
        xfs_agblock_t           bno;
        xfs_extlen_t            len;
 
 
                        xchk_fblock_set_corrupt(sc, sbcri->whichfork,
                                        rec->rm_offset);
                if (irec.br_startblock != XFS_AGB_TO_FSB(sc->mp,
-                               cur->bc_private.a.agno, rec->rm_startblock))
+                               cur->bc_ag.agno, rec->rm_startblock))
                        xchk_fblock_set_corrupt(sc, sbcri->whichfork,
                                        rec->rm_offset);
                if (irec.br_blockcount > rec->rm_blockcount)
 
        xfs_extlen_t                    len)
 {
        struct xfs_mount                *mp = bs->cur->bc_mp;
-       xfs_agnumber_t                  agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t                  agno = bs->cur->bc_ag.agno;
        xfs_agblock_t                   bno;
 
        bno = XFS_AGINO_TO_AGBNO(mp, agino);
         * the record, compute which fs inode we're talking about.
         */
        agino = irec->ir_startino + irec_ino;
-       fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
+       fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_ag.agno, agino);
        irec_free = (irec->ir_free & XFS_INOBT_MASK(irec_ino));
 
        if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
        struct xfs_dinode               *dip;
        struct xfs_buf                  *cluster_bp;
        unsigned int                    nr_inodes;
-       xfs_agnumber_t                  agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t                  agno = bs->cur->bc_ag.agno;
        xfs_agblock_t                   agbno;
        unsigned int                    cluster_index;
        uint16_t                        cluster_mask = 0;
        struct xchk_iallocbt            *iabt = bs->private;
        struct xfs_inobt_rec_incore     irec;
        uint64_t                        holes;
-       xfs_agnumber_t                  agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t                  agno = bs->cur->bc_ag.agno;
        xfs_agino_t                     agino;
        xfs_extlen_t                    len;
        int                             holecount;
 
 {
        struct xfs_mount        *mp = bs->cur->bc_mp;
        xfs_agblock_t           *cow_blocks = bs->private;
-       xfs_agnumber_t          agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t          agno = bs->cur->bc_ag.agno;
        xfs_agblock_t           bno;
        xfs_extlen_t            len;
        xfs_nlink_t             refcount;
 
 {
        struct xfs_mount        *mp = bs->cur->bc_mp;
        struct xfs_rmap_irec    irec;
-       xfs_agnumber_t          agno = bs->cur->bc_private.a.agno;
+       xfs_agnumber_t          agno = bs->cur->bc_ag.agno;
        bool                    non_inode;
        bool                    is_unwritten;
        bool                    is_bmbt;
 
                 cur->bc_flags & XFS_BTREE_LONG_PTRS)
                return XFS_INO_TO_FSB(cur->bc_mp, cur->bc_private.b.ip->i_ino);
        else if (!(cur->bc_flags & XFS_BTREE_LONG_PTRS))
-               return XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_private.a.agno, 0);
+               return XFS_AGB_TO_FSB(cur->bc_mp, cur->bc_ag.agno, 0);
        return NULLFSBLOCK;
 }
 
 
        xfs_fsblock_t                   fsb;
        xfs_daddr_t                     rec_daddr;
 
-       fsb = XFS_AGB_TO_FSB(mp, cur->bc_private.a.agno, rec->rm_startblock);
+       fsb = XFS_AGB_TO_FSB(mp, cur->bc_ag.agno, rec->rm_startblock);
        rec_daddr = XFS_FSB_TO_DADDR(mp, fsb);
 
        return xfs_getfsmap_helper(cur->bc_tp, info, rec, rec_daddr);
        struct xfs_rmap_irec            irec;
        xfs_daddr_t                     rec_daddr;
 
-       rec_daddr = XFS_AGB_TO_DADDR(mp, cur->bc_private.a.agno,
+       rec_daddr = XFS_AGB_TO_DADDR(mp, cur->bc_ag.agno,
                        rec->ar_startblock);
 
        irec.rm_startblock = rec->ar_startblock;