Merge tag 'jfs-5.19' of https://github.com/kleikamp/linux-shaggy

Pull jfs updates from David Kleikamp:
 "One bug fix and some code cleanup"

* tag 'jfs-5.19' of https://github.com/kleikamp/linux-shaggy:
  fs/jfs: Remove dead code
  fs: jfs: fix possible NULL pointer dereference in dbFree()

10 files changed, 3 insertions, 1652 deletions

diff --git a/fs/jfs/Makefile b/fs/jfs/Makefile
index 285ec189ed5c..7156d2c218c7 100644
--- a/fs/jfs/Makefile
+++ b/fs/jfs/Makefile
@@ -13,5 +13,3 @@ jfs-y    := super.o file.o inode.o namei.o jfs_mount.o jfs_umount.o \
 	    resize.o xattr.o ioctl.o
 
 jfs-$(CONFIG_JFS_POSIX_ACL) += acl.o
-
-ccflags-y := -D_JFS_4K
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index a5dd7e53754a..259326556ada 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -224,18 +224,9 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
 				 * this as a hole
 				 */
 				goto unlock;
-#ifdef _JFS_4K
 			XADoffset(&xad, lblock64);
 			XADlength(&xad, xlen);
 			XADaddress(&xad, xaddr);
-#else				/* _JFS_4K */
-			/*
-			 * As long as block size = 4K, this isn't a problem.
-			 * We should mark the whole page not ABNR, but how
-			 * will we know to mark the other blocks BH_New?
-			 */
-			BUG();
-#endif				/* _JFS_4K */
 			rc = extRecord(ip, &xad);
 			if (rc)
 				goto unlock;
@@ -252,7 +243,6 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
 	/*
 	 * Allocate a new block
 	 */
-#ifdef _JFS_4K
 	if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
 		goto unlock;
 	rc = extAlloc(ip, xlen, lblock64, &xad, false);
@@ -263,14 +253,6 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
 	map_bh(bh_result, ip->i_sb, addressXAD(&xad));
 	bh_result->b_size = lengthXAD(&xad) << ip->i_blkbits;
 
-#else				/* _JFS_4K */
-	/*
-	 * We need to do whatever it takes to keep all but the last buffers
-	 * in 4K pages - see jfs_write.c
-	 */
-	BUG();
-#endif				/* _JFS_4K */
-
       unlock:
 	/*
 	 * Release lock on inode
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index d8502f4989d9..6b838d3ae7c2 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -385,7 +385,8 @@ int dbFree(struct inode *ip, s64 blkno, s64 nblocks)
 	}
 
 	/* write the last buffer. */
-	write_metapage(mp);
+	if (mp)
+		write_metapage(mp);
 
 	IREAD_UNLOCK(ipbmap);
 
@@ -868,74 +869,6 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
 	return (rc);
 }
 
-#ifdef _NOTYET
-/*
- * NAME:	dbAllocExact()
- *
- * FUNCTION:	try to allocate the requested extent;
- *
- * PARAMETERS:
- *	ip	- pointer to in-core inode;
- *	blkno	- extent address;
- *	nblocks	- extent length;
- *
- * RETURN VALUES:
- *	0	- success
- *	-ENOSPC	- insufficient disk resources
- *	-EIO	- i/o error
- */
-int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
-{
-	int rc;
-	struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
-	struct bmap *bmp = JFS_SBI(ip->i_sb)->bmap;
-	struct dmap *dp;
-	s64 lblkno;
-	struct metapage *mp;
-
-	IREAD_LOCK(ipbmap, RDWRLOCK_DMAP);
-
-	/*
-	 * validate extent request:
-	 *
-	 * note: defragfs policy:
-	 *  max 64 blocks will be moved.
-	 *  allocation request size must be satisfied from a single dmap.
-	 */
-	if (nblocks <= 0 || nblocks > BPERDMAP || blkno >= bmp->db_mapsize) {
-		IREAD_UNLOCK(ipbmap);
-		return -EINVAL;
-	}
-
-	if (nblocks > ((s64) 1 << bmp->db_maxfreebud)) {
-		/* the free space is no longer available */
-		IREAD_UNLOCK(ipbmap);
-		return -ENOSPC;
-	}
-
-	/* read in the dmap covering the extent */
-	lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
-	mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
-	if (mp == NULL) {
-		IREAD_UNLOCK(ipbmap);
-		return -EIO;
-	}
-	dp = (struct dmap *) mp->data;
-
-	/* try to allocate the requested extent */
-	rc = dbAllocNext(bmp, dp, blkno, nblocks);
-
-	IREAD_UNLOCK(ipbmap);
-
-	if (rc == 0)
-		mark_metapage_dirty(mp);
-
-	release_metapage(mp);
-
-	return (rc);
-}
-#endif /* _NOTYET */
-
 /*
  * NAME:	dbReAlloc()
  *
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index 837d42f61464..92b7c533407c 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -2423,304 +2423,6 @@ static int dtDeleteUp(tid_t tid, struct inode *ip,
 	return 0;
 }
 
-#ifdef _NOTYET
-/*
- * NAME:	dtRelocate()
- *
- * FUNCTION:	relocate dtpage (internal or leaf) of directory;
- *		This function is mainly used by defragfs utility.
- */
-int dtRelocate(tid_t tid, struct inode *ip, s64 lmxaddr, pxd_t * opxd,
-	       s64 nxaddr)
-{
-	int rc = 0;
-	struct metapage *mp, *pmp, *lmp, *rmp;
-	dtpage_t *p, *pp, *rp = 0, *lp= 0;
-	s64 bn;
-	int index;
-	struct btstack btstack;
-	pxd_t *pxd;
-	s64 oxaddr, nextbn, prevbn;
-	int xlen, xsize;
-	struct tlock *tlck;
-	struct dt_lock *dtlck;
-	struct pxd_lock *pxdlock;
-	s8 *stbl;
-	struct lv *lv;
-
-	oxaddr = addressPXD(opxd);
-	xlen = lengthPXD(opxd);
-
-	jfs_info("dtRelocate: lmxaddr:%Ld xaddr:%Ld:%Ld xlen:%d",
-		   (long long)lmxaddr, (long long)oxaddr, (long long)nxaddr,
-		   xlen);
-
-	/*
-	 *	1. get the internal parent dtpage covering
-	 *	router entry for the tartget page to be relocated;
-	 */
-	rc = dtSearchNode(ip, lmxaddr, opxd, &btstack);
-	if (rc)
-		return rc;
-
-	/* retrieve search result */
-	DT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
-	jfs_info("dtRelocate: parent router entry validated.");
-
-	/*
-	 *	2. relocate the target dtpage
-	 */
-	/* read in the target page from src extent */
-	DT_GETPAGE(ip, oxaddr, mp, PSIZE, p, rc);
-	if (rc) {
-		/* release the pinned parent page */
-		DT_PUTPAGE(pmp);
-		return rc;
-	}
-
-	/*
-	 * read in sibling pages if any to update sibling pointers;
-	 */
-	rmp = NULL;
-	if (p->header.next) {
-		nextbn = le64_to_cpu(p->header.next);
-		DT_GETPAGE(ip, nextbn, rmp, PSIZE, rp, rc);
-		if (rc) {
-			DT_PUTPAGE(mp);
-			DT_PUTPAGE(pmp);
-			return (rc);
-		}
-	}
-
-	lmp = NULL;
-	if (p->header.prev) {
-		prevbn = le64_to_cpu(p->header.prev);
-		DT_GETPAGE(ip, prevbn, lmp, PSIZE, lp, rc);
-		if (rc) {
-			DT_PUTPAGE(mp);
-			DT_PUTPAGE(pmp);
-			if (rmp)
-				DT_PUTPAGE(rmp);
-			return (rc);
-		}
-	}
-
-	/* at this point, all xtpages to be updated are in memory */
-
-	/*
-	 * update sibling pointers of sibling dtpages if any;
-	 */
-	if (lmp) {
-		tlck = txLock(tid, ip, lmp, tlckDTREE | tlckRELINK);
-		dtlck = (struct dt_lock *) & tlck->lock;
-		/* linelock header */
-		ASSERT(dtlck->index == 0);
-		lv = & dtlck->lv[0];
-		lv->offset = 0;
-		lv->length = 1;
-		dtlck->index++;
-
-		lp->header.next = cpu_to_le64(nxaddr);
-		DT_PUTPAGE(lmp);
-	}
-
-	if (rmp) {
-		tlck = txLock(tid, ip, rmp, tlckDTREE | tlckRELINK);
-		dtlck = (struct dt_lock *) & tlck->lock;
-		/* linelock header */
-		ASSERT(dtlck->index == 0);
-		lv = & dtlck->lv[0];
-		lv->offset = 0;
-		lv->length = 1;
-		dtlck->index++;
-
-		rp->header.prev = cpu_to_le64(nxaddr);
-		DT_PUTPAGE(rmp);
-	}
-
-	/*
-	 * update the target dtpage to be relocated
-	 *
-	 * write LOG_REDOPAGE of LOG_NEW type for dst page
-	 * for the whole target page (logredo() will apply
-	 * after image and update bmap for allocation of the
-	 * dst extent), and update bmap for allocation of
-	 * the dst extent;
-	 */
-	tlck = txLock(tid, ip, mp, tlckDTREE | tlckNEW);
-	dtlck = (struct dt_lock *) & tlck->lock;
-	/* linelock header */
-	ASSERT(dtlck->index == 0);
-	lv = & dtlck->lv[0];
-
-	/* update the self address in the dtpage header */
-	pxd = &p->header.self;
-	PXDaddress(pxd, nxaddr);
-
-	/* the dst page is the same as the src page, i.e.,
-	 * linelock for afterimage of the whole page;
-	 */
-	lv->offset = 0;
-	lv->length = p->header.maxslot;
-	dtlck->index++;
-
-	/* update the buffer extent descriptor of the dtpage */
-	xsize = xlen << JFS_SBI(ip->i_sb)->l2bsize;
-
-	/* unpin the relocated page */
-	DT_PUTPAGE(mp);
-	jfs_info("dtRelocate: target dtpage relocated.");
-
-	/* the moved extent is dtpage, then a LOG_NOREDOPAGE log rec
-	 * needs to be written (in logredo(), the LOG_NOREDOPAGE log rec
-	 * will also force a bmap update ).
-	 */
-
-	/*
-	 *	3. acquire maplock for the source extent to be freed;
-	 */
-	/* for dtpage relocation, write a LOG_NOREDOPAGE record
-	 * for the source dtpage (logredo() will init NoRedoPage
-	 * filter and will also update bmap for free of the source
-	 * dtpage), and upadte bmap for free of the source dtpage;
-	 */
-	tlck = txMaplock(tid, ip, tlckDTREE | tlckFREE);
-	pxdlock = (struct pxd_lock *) & tlck->lock;
-	pxdlock->flag = mlckFREEPXD;
-	PXDaddress(&pxdlock->pxd, oxaddr);
-	PXDlength(&pxdlock->pxd, xlen);
-	pxdlock->index = 1;
-
-	/*
-	 *	4. update the parent router entry for relocation;
-	 *
-	 * acquire tlck for the parent entry covering the target dtpage;
-	 * write LOG_REDOPAGE to apply after image only;
-	 */
-	jfs_info("dtRelocate: update parent router entry.");
-	tlck = txLock(tid, ip, pmp, tlckDTREE | tlckENTRY);
-	dtlck = (struct dt_lock *) & tlck->lock;
-	lv = & dtlck->lv[dtlck->index];
-
-	/* update the PXD with the new address */
-	stbl = DT_GETSTBL(pp);
-	pxd = (pxd_t *) & pp->slot[stbl[index]];
-	PXDaddress(pxd, nxaddr);
-	lv->offset = stbl[index];
-	lv->length = 1;
-	dtlck->index++;
-
-	/* unpin the parent dtpage */
-	DT_PUTPAGE(pmp);
-
-	return rc;
-}
-
-/*
- * NAME:	dtSearchNode()
- *
- * FUNCTION:	Search for an dtpage containing a specified address
- *		This function is mainly used by defragfs utility.
- *
- * NOTE:	Search result on stack, the found page is pinned at exit.
- *		The result page must be an internal dtpage.
- *		lmxaddr give the address of the left most page of the
- *		dtree level, in which the required dtpage resides.
- */
-static int dtSearchNode(struct inode *ip, s64 lmxaddr, pxd_t * kpxd,
-			struct btstack * btstack)
-{
-	int rc = 0;
-	s64 bn;
-	struct metapage *mp;
-	dtpage_t *p;
-	int psize = 288;	/* initial in-line directory */
-	s8 *stbl;
-	int i;
-	pxd_t *pxd;
-	struct btframe *btsp;
-
-	BT_CLR(btstack);	/* reset stack */
-
-	/*
-	 *	descend tree to the level with specified leftmost page
-	 *
-	 *  by convention, root bn = 0.
-	 */
-	for (bn = 0;;) {
-		/* get/pin the page to search */
-		DT_GETPAGE(ip, bn, mp, psize, p, rc);
-		if (rc)
-			return rc;
-
-		/* does the xaddr of leftmost page of the levevl
-		 * matches levevl search key ?
-		 */
-		if (p->header.flag & BT_ROOT) {
-			if (lmxaddr == 0)
-				break;
-		} else if (addressPXD(&p->header.self) == lmxaddr)
-			break;
-
-		/*
-		 * descend down to leftmost child page
-		 */
-		if (p->header.flag & BT_LEAF) {
-			DT_PUTPAGE(mp);
-			return -ESTALE;
-		}
-
-		/* get the leftmost entry */
-		stbl = DT_GETSTBL(p);
-		pxd = (pxd_t *) & p->slot[stbl[0]];
-
-		/* get the child page block address */
-		bn = addressPXD(pxd);
-		psize = lengthPXD(pxd) << JFS_SBI(ip->i_sb)->l2bsize;
-		/* unpin the parent page */
-		DT_PUTPAGE(mp);
-	}
-
-	/*
-	 *	search each page at the current levevl
-	 */
-      loop:
-	stbl = DT_GETSTBL(p);
-	for (i = 0; i < p->header.nextindex; i++) {
-		pxd = (pxd_t *) & p->slot[stbl[i]];
-
-		/* found the specified router entry */
-		if (addressPXD(pxd) == addressPXD(kpxd) &&
-		    lengthPXD(pxd) == lengthPXD(kpxd)) {
-			btsp = btstack->top;
-			btsp->bn = bn;
-			btsp->index = i;
-			btsp->mp = mp;
-
-			return 0;
-		}
-	}
-
-	/* get the right sibling page if any */
-	if (p->header.next)
-		bn = le64_to_cpu(p->header.next);
-	else {
-		DT_PUTPAGE(mp);
-		return -ESTALE;
-	}
-
-	/* unpin current page */
-	DT_PUTPAGE(mp);
-
-	/* get the right sibling page */
-	DT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
-	if (rc)
-		return rc;
-
-	goto loop;
-}
-#endif /* _NOTYET */
-
 /*
  *	dtRelink()
  *
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index bb4a342a193d..ae99a7e232ee 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -16,9 +16,6 @@
  * forward references
  */
 static int extBalloc(struct inode *, s64, s64 *, s64 *);
-#ifdef _NOTYET
-static int extBrealloc(struct inode *, s64, s64, s64 *, s64 *);
-#endif
 static s64 extRoundDown(s64 nb);
 
 #define DPD(a)		(printk("(a): %d\n",(a)))
@@ -177,162 +174,6 @@ extAlloc(struct inode *ip, s64 xlen, s64 pno, xad_t * xp, bool abnr)
 	return (0);
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extRealloc()
- *
- * FUNCTION:	extend the allocation of a file extent containing a
- *		partial back last page.
- *
- * PARAMETERS:
- *	ip	- the inode of the file.
- *	cp	- cbuf for the partial backed last page.
- *	xlen	- request size of the resulting extent.
- *	xp	- pointer to an xad. on successful exit, the xad
- *		  describes the newly allocated extent.
- *	abnr	- bool indicating whether the newly allocated extent
- *		  should be marked as allocated but not recorded.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-int extRealloc(struct inode *ip, s64 nxlen, xad_t * xp, bool abnr)
-{
-	struct super_block *sb = ip->i_sb;
-	s64 xaddr, xlen, nxaddr, delta, xoff;
-	s64 ntail, nextend, ninsert;
-	int rc, nbperpage = JFS_SBI(sb)->nbperpage;
-	int xflag;
-
-	/* This blocks if we are low on resources */
-	txBeginAnon(ip->i_sb);
-
-	mutex_lock(&JFS_IP(ip)->commit_mutex);
-	/* validate extent length */
-	if (nxlen > MAXXLEN)
-		nxlen = MAXXLEN;
-
-	/* get the extend (partial) page's disk block address and
-	 * number of blocks.
-	 */
-	xaddr = addressXAD(xp);
-	xlen = lengthXAD(xp);
-	xoff = offsetXAD(xp);
-
-	/* if the extend page is abnr and if the request is for
-	 * the extent to be allocated and recorded,
-	 * make the page allocated and recorded.
-	 */
-	if ((xp->flag & XAD_NOTRECORDED) && !abnr) {
-		xp->flag = 0;
-		if ((rc = xtUpdate(0, ip, xp)))
-			goto exit;
-	}
-
-	/* try to allocated the request number of blocks for the
-	 * extent.  dbRealloc() first tries to satisfy the request
-	 * by extending the allocation in place. otherwise, it will
-	 * try to allocate a new set of blocks large enough for the
-	 * request.  in satisfying a request, dbReAlloc() may allocate
-	 * less than what was request but will always allocate enough
-	 * space as to satisfy the extend page.
-	 */
-	if ((rc = extBrealloc(ip, xaddr, xlen, &nxlen, &nxaddr)))
-		goto exit;
-
-	/* Allocat blocks to quota. */
-	rc = dquot_alloc_block(ip, nxlen);
-	if (rc) {
-		dbFree(ip, nxaddr, (s64) nxlen);
-		mutex_unlock(&JFS_IP(ip)->commit_mutex);
-		return rc;
-	}
-
-	delta = nxlen - xlen;
-
-	/* check if the extend page is not abnr but the request is abnr
-	 * and the allocated disk space is for more than one page.  if this
-	 * is the case, there is a miss match of abnr between the extend page
-	 * and the one or more pages following the extend page.  as a result,
-	 * two extents will have to be manipulated. the first will be that
-	 * of the extent of the extend page and will be manipulated thru
-	 * an xtExtend() or an xtTailgate(), depending upon whether the
-	 * disk allocation occurred as an inplace extension.  the second
-	 * extent will be manipulated (created) through an xtInsert() and
-	 * will be for the pages following the extend page.
-	 */
-	if (abnr && (!(xp->flag & XAD_NOTRECORDED)) && (nxlen > nbperpage)) {
-		ntail = nbperpage;
-		nextend = ntail - xlen;
-		ninsert = nxlen - nbperpage;
-
-		xflag = XAD_NOTRECORDED;
-	} else {
-		ntail = nxlen;
-		nextend = delta;
-		ninsert = 0;
-
-		xflag = xp->flag;
-	}
-
-	/* if we were able to extend the disk allocation in place,
-	 * extend the extent.  otherwise, move the extent to a
-	 * new disk location.
-	 */
-	if (xaddr == nxaddr) {
-		/* extend the extent */
-		if ((rc = xtExtend(0, ip, xoff + xlen, (int) nextend, 0))) {
-			dbFree(ip, xaddr + xlen, delta);
-			dquot_free_block(ip, nxlen);
-			goto exit;
-		}
-	} else {
-		/*
-		 * move the extent to a new location:
-		 *
-		 * xtTailgate() accounts for relocated tail extent;
-		 */
-		if ((rc = xtTailgate(0, ip, xoff, (int) ntail, nxaddr, 0))) {
-			dbFree(ip, nxaddr, nxlen);
-			dquot_free_block(ip, nxlen);
-			goto exit;
-		}
-	}
-
-
-	/* check if we need to also insert a new extent */
-	if (ninsert) {
-		/* perform the insert.  if it fails, free the blocks
-		 * to be inserted and make it appear that we only did
-		 * the xtExtend() or xtTailgate() above.
-		 */
-		xaddr = nxaddr + ntail;
-		if (xtInsert (0, ip, xflag, xoff + ntail, (int) ninsert,
-			      &xaddr, 0)) {
-			dbFree(ip, xaddr, (s64) ninsert);
-			delta = nextend;
-			nxlen = ntail;
-			xflag = 0;
-		}
-	}
-
-	/* set the return results */
-	XADaddress(xp, nxaddr);
-	XADlength(xp, nxlen);
-	XADoffset(xp, xoff);
-	xp->flag = xflag;
-
-	mark_inode_dirty(ip);
-exit:
-	mutex_unlock(&JFS_IP(ip)->commit_mutex);
-	return (rc);
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extHint()
  *
@@ -423,44 +264,6 @@ int extRecord(struct inode *ip, xad_t * xp)
 	return rc;
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extFill()
- *
- * FUNCTION:	allocate disk space for a file page that represents
- *		a file hole.
- *
- * PARAMETERS:
- *	ip	- the inode of the file.
- *	cp	- cbuf of the file page represent the hole.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-int extFill(struct inode *ip, xad_t * xp)
-{
-	int rc, nbperpage = JFS_SBI(ip->i_sb)->nbperpage;
-	s64 blkno = offsetXAD(xp) >> ip->i_blkbits;
-
-//	assert(ISSPARSE(ip));
-
-	/* initialize the extent allocation hint */
-	XADaddress(xp, 0);
-
-	/* allocate an extent to fill the hole */
-	if ((rc = extAlloc(ip, nbperpage, blkno, xp, false)))
-		return (rc);
-
-	assert(lengthPXD(xp) == nbperpage);
-
-	return (0);
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extBalloc()
  *
@@ -550,64 +353,6 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno)
 	return (0);
 }
 
-
-#ifdef _NOTYET
-/*
- * NAME:	extBrealloc()
- *
- * FUNCTION:	attempt to extend an extent's allocation.
- *
- *		Initially, we will try to extend the extent's allocation
- *		in place.  If this fails, we'll try to move the extent
- *		to a new set of blocks.  If moving the extent, we initially
- *		will try to allocate disk blocks for the requested size
- *		(newnblks).  if this fails (new contiguous free blocks not
- *		available), we'll try to allocate a smaller number of
- *		blocks (producing a smaller extent), with this smaller
- *		number of blocks consisting of the requested number of
- *		blocks rounded down to the next smaller power of 2
- *		number (i.e. 16 -> 8).  We'll continue to round down and
- *		retry the allocation until the number of blocks to allocate
- *		is smaller than the number of blocks per page.
- *
- * PARAMETERS:
- *	ip	 - the inode of the file.
- *	blkno	 - starting block number of the extents current allocation.
- *	nblks	 - number of blocks within the extents current allocation.
- *	newnblks - pointer to a s64 value.  on entry, this value is the
- *		   new desired extent size (number of blocks).  on
- *		   successful exit, this value is set to the extent's actual
- *		   new size (new number of blocks).
- *	newblkno - the starting block number of the extents new allocation.
- *
- * RETURN VALUES:
- *	0	- success
- *	-EIO	- i/o error.
- *	-ENOSPC	- insufficient disk resources.
- */
-static int
-extBrealloc(struct inode *ip,
-	    s64 blkno, s64 nblks, s64 * newnblks, s64 * newblkno)
-{
-	int rc;
-
-	/* try to extend in place */
-	if ((rc = dbExtend(ip, blkno, nblks, *newnblks - nblks)) == 0) {
-		*newblkno = blkno;
-		return (0);
-	} else {
-		if (rc != -ENOSPC)
-			return (rc);
-	}
-
-	/* in place extension not possible.
-	 * try to move the extent to a new set of blocks.
-	 */
-	return (extBalloc(ip, blkno, newnblks, newblkno));
-}
-#endif			/* _NOTYET */
-
-
 /*
  * NAME:	extRoundDown()
  *
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 997c81fcea34..695415cbfe98 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -388,14 +388,6 @@ lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 			p = (caddr_t) &JFS_IP(tlck->ip)->i_xtroot;
 		linelock = (struct linelock *) & tlck->lock;
 	}
-#ifdef	_JFS_WIP
-	else if (tlck->flag & tlckINLINELOCK) {
-
-		inlinelock = (struct inlinelock *) & tlck;
-		p = (caddr_t) & inlinelock->pxd;
-		linelock = (struct linelock *) & tlck;
-	}
-#endif				/* _JFS_WIP */
 	else {
 		jfs_err("lmWriteRecord: UFO tlck:0x%p", tlck);
 		return 0;	/* Probably should trap */
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index aa4ff7bcaff2..48d1f70f786c 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -307,13 +307,11 @@ static int chkSuper(struct super_block *sb)
 	}
 
 	bsize = le32_to_cpu(j_sb->s_bsize);
-#ifdef _JFS_4K
 	if (bsize != PSIZE) {
-		jfs_err("Currently only 4K block size supported!");
+		jfs_err("Only 4K block size supported!");
 		rc = -EINVAL;
 		goto out;
 	}
-#endif				/* _JFS_4K */
 
 	jfs_info("superblock: flag:0x%08x state:0x%08x size:0x%Lx",
 		 le32_to_cpu(j_sb->s_flag), le32_to_cpu(j_sb->s_state),
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 042bbe6d8ac2..ffd4feece078 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -1490,40 +1490,6 @@ static void diLog(struct jfs_log *log, struct tblock *tblk, struct lrd *lrd,
 		tlck->flag |= tlckWRITEPAGE;
 	} else
 		jfs_err("diLog: UFO type tlck:0x%p", tlck);
-#ifdef  _JFS_WIP
-	/*
-	 *	alloc/free external EA extent
-	 *
-	 * a maplock for txUpdateMap() to update bPWMAP for alloc/free
-	 * of the extent has been formatted at txLock() time;
-	 */
-	else {
-		assert(tlck->type & tlckEA);
-
-		/* log LOG_UPDATEMAP for logredo() to update bmap for
-		 * alloc of new (and free of old) external EA extent;
-		 */
-		lrd->type = cpu_to_le16(LOG_UPDATEMAP);
-		pxdlock = (struct pxd_lock *) & tlck->lock;
-		nlock = pxdlock->index;
-		for (i = 0; i < nlock; i++, pxdlock++) {
-			if (pxdlock->flag & mlckALLOCPXD)
-				lrd->log.updatemap.type =
-				    cpu_to_le16(LOG_ALLOCPXD);
-			else
-				lrd->log.updatemap.type =
-				    cpu_to_le16(LOG_FREEPXD);
-			lrd->log.updatemap.nxd = cpu_to_le16(1);
-			lrd->log.updatemap.pxd = pxdlock->pxd;
-			lrd->backchain =
-			    cpu_to_le32(lmLog(log, tblk, lrd, NULL));
-		}
-
-		/* update bmap */
-		tlck->flag |= tlckUPDATEMAP;
-	}
-#endif				/* _JFS_WIP */
-
 	return;
 }
 
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 3148e9b35f3b..2d304cee884c 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -114,17 +114,6 @@ static int xtSplitPage(tid_t tid, struct inode *ip, struct xtsplit * split,
 static int xtSplitRoot(tid_t tid, struct inode *ip,
 		       struct xtsplit * split, struct metapage ** rmpp);
 
-#ifdef _STILL_TO_PORT
-static int xtDeleteUp(tid_t tid, struct inode *ip, struct metapage * fmp,
-		      xtpage_t * fp, struct btstack * btstack);
-
-static int xtSearchNode(struct inode *ip,
-			xad_t * xad,
-			int *cmpp, struct btstack * btstack, int flag);
-
-static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * fp);
-#endif				/*  _STILL_TO_PORT */
-
 /*
  *	xtLookup()
  *
@@ -1493,189 +1482,6 @@ int xtExtend(tid_t tid,		/* transaction id */
 	return rc;
 }
 
-#ifdef _NOTYET
-/*
- *	xtTailgate()
- *
- * function: split existing 'tail' extent
- *	(split offset >= start offset of tail extent), and
- *	relocate and extend the split tail half;
- *
- * note: existing extent may or may not have been committed.
- * caller is responsible for pager buffer cache update, and
- * working block allocation map update;
- * update pmap: free old split tail extent, alloc new extent;
- */
-int xtTailgate(tid_t tid,		/* transaction id */
-	       struct inode *ip, s64 xoff,	/* split/new extent offset */
-	       s32 xlen,	/* new extent length */
-	       s64 xaddr,	/* new extent address */
-	       int flag)
-{
-	int rc = 0;
-	int cmp;
-	struct metapage *mp;	/* meta-page buffer */
-	xtpage_t *p;		/* base B+-tree index page */
-	s64 bn;
-	int index, nextindex, llen, rlen;
-	struct btstack btstack;	/* traverse stack */
-	struct xtsplit split;	/* split information */
-	xad_t *xad;
-	struct tlock *tlck;
-	struct xtlock *xtlck = 0;
-	struct tlock *mtlck;
-	struct maplock *pxdlock;
-
-/*
-printf("xtTailgate: nxoff:0x%lx nxlen:0x%x nxaddr:0x%lx\n",
-	(ulong)xoff, xlen, (ulong)xaddr);
-*/
-
-	/* there must exist extent to be tailgated */
-	if ((rc = xtSearch(ip, xoff, NULL, &cmp, &btstack, XT_INSERT)))
-		return rc;
-
-	/* retrieve search result */
-	XT_GETSEARCH(ip, btstack.top, bn, mp, p, index);
-
-	if (cmp != 0) {
-		XT_PUTPAGE(mp);
-		jfs_error(ip->i_sb, "couldn't find extent\n");
-		return -EIO;
-	}
-
-	/* entry found must be last entry */
-	nextindex = le16_to_cpu(p->header.nextindex);
-	if (index != nextindex - 1) {
-		XT_PUTPAGE(mp);
-		jfs_error(ip->i_sb, "the entry found is not the last entry\n");
-		return -EIO;
-	}
-
-	BT_MARK_DIRTY(mp, ip);
-	/*
-	 * acquire tlock of the leaf page containing original entry
-	 */
-	if (!test_cflag(COMMIT_Nolink, ip)) {
-		tlck = txLock(tid, ip, mp, tlckXTREE | tlckGROW);
-		xtlck = (struct xtlock *) & tlck->lock;
-	}
-
-	/* completely replace extent ? */
-	xad = &p->xad[index];
-/*
-printf("xtTailgate: xoff:0x%lx xlen:0x%x xaddr:0x%lx\n",
-	(ulong)offsetXAD(xad), lengthXAD(xad), (ulong)addressXAD(xad));
-*/
-	if ((llen = xoff - offsetXAD(xad)) == 0)
-		goto updateOld;
-
-	/*
-	 *	partially replace extent: insert entry for new extent
-	 */
-//insertNew:
-	/*
-	 *	if the leaf page is full, insert the new entry and
-	 *	propagate up the router entry for the new page from split
-	 *
-	 * The xtSplitUp() will insert the entry and unpin the leaf page.
-	 */
-	if (nextindex == le16_to_cpu(p->header.maxentry)) {
-		/* xtSpliUp() unpins leaf pages */
-		split.mp = mp;
-		split.index = index + 1;
-		split.flag = XAD_NEW;
-		split.off = xoff;	/* split offset */
-		split.len = xlen;
-		split.addr = xaddr;
-		split.pxdlist = NULL;
-		if ((rc = xtSplitUp(tid, ip, &split, &btstack)))
-			return rc;
-
-		/* get back old page */
-		XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
-		if (rc)
-			return rc;
-		/*
-		 * if leaf root has been split, original root has been
-		 * copied to new child page, i.e., original entry now
-		 * resides on the new child page;
-		 */
-		if (p->header.flag & BT_INTERNAL) {
-			ASSERT(p->header.nextindex ==
-			       cpu_to_le16(XTENTRYSTART + 1));
-			xad = &p->xad[XTENTRYSTART];
-			bn = addressXAD(xad);
-			XT_PUTPAGE(mp);
-
-			/* get new child page */
-			XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
-			if (rc)
-				return rc;
-
-			BT_MARK_DIRTY(mp, ip);
-			if (!test_cflag(COMMIT_Nolink, ip)) {
-				tlck = txLock(tid, ip, mp, tlckXTREE|tlckGROW);
-				xtlck = (struct xtlock *) & tlck->lock;
-			}
-		}
-	}
-	/*
-	 *	insert the new entry into the leaf page
-	 */
-	else {
-		/* insert the new entry: mark the entry NEW */
-		xad = &p->xad[index + 1];
-		XT_PUTENTRY(xad, XAD_NEW, xoff, xlen, xaddr);
-
-		/* advance next available entry index */
-		le16_add_cpu(&p->header.nextindex, 1);
-	}
-
-	/* get back old XAD */
-	xad = &p->xad[index];
-
-	/*
-	 * truncate/relocate old extent at split offset
-	 */
-      updateOld:
-	/* update dmap for old/committed/truncated extent */
-	rlen = lengthXAD(xad) - llen;
-	if (!(xad->flag & XAD_NEW)) {
-		/* free from PWMAP at commit */
-		if (!test_cflag(COMMIT_Nolink, ip)) {
-			mtlck = txMaplock(tid, ip, tlckMAP);
-			pxdlock = (struct maplock *) & mtlck->lock;
-			pxdlock->flag = mlckFREEPXD;
-			PXDaddress(&pxdlock->pxd, addressXAD(xad) + llen);
-			PXDlength(&pxdlock->pxd, rlen);
-			pxdlock->index = 1;
-		}
-	} else
-		/* free from WMAP */
-		dbFree(ip, addressXAD(xad) + llen, (s64) rlen);
-
-	if (llen)
-		/* truncate */
-		XADlength(xad, llen);
-	else
-		/* replace */
-		XT_PUTENTRY(xad, XAD_NEW, xoff, xlen, xaddr);
-
-	if (!test_cflag(COMMIT_Nolink, ip)) {
-		xtlck->lwm.offset = (xtlck->lwm.offset) ?
-		    min(index, (int)xtlck->lwm.offset) : index;
-		xtlck->lwm.length = le16_to_cpu(p->header.nextindex) -
-		    xtlck->lwm.offset;
-	}
-
-	/* unpin the leaf page */
-	XT_PUTPAGE(mp);
-
-	return rc;
-}
-#endif /* _NOTYET */
-
 /*
  *	xtUpdate()
  *
@@ -1753,32 +1559,12 @@ int xtUpdate(tid_t tid, struct inode *ip, xad_t * nxad)
 	newindex = index + 1;
 	nextindex = le16_to_cpu(p->header.nextindex);
 
-#ifdef  _JFS_WIP_NOCOALESCE
-	if (xoff < nxoff)
-		goto updateRight;
-
-	/*
-	 * replace XAD with nXAD
-	 */
-      replace:			/* (nxoff == xoff) */
-	if (nxlen == xlen) {
-		/* replace XAD with nXAD:recorded */
-		*xad = *nxad;
-		xad->flag = xflag & ~XAD_NOTRECORDED;
-
-		goto out;
-	} else			/* (nxlen < xlen) */
-		goto updateLeft;
-#endif				/* _JFS_WIP_NOCOALESCE */
-
-/* #ifdef _JFS_WIP_COALESCE */
 	if (xoff < nxoff)
 		goto coalesceRight;
 
 	/*
 	 * coalesce with left XAD
 	 */
-//coalesceLeft: /* (xoff == nxoff) */
 	/* is XAD first entry of page ? */
 	if (index == XTENTRYSTART)
 		goto replace;
@@ -1897,7 +1683,6 @@ int xtUpdate(tid_t tid, struct inode *ip, xad_t * nxad)
 		jfs_error(ip->i_sb, "xoff >= nxoff\n");
 		return -EIO;
 	}
-/* #endif _JFS_WIP_COALESCE */
 
 	/*
 	 * split XAD into (lXAD, nXAD):
@@ -2305,752 +2090,6 @@ int xtAppend(tid_t tid,		/* transaction id */
 
 	return rc;
 }
-#ifdef _STILL_TO_PORT
-
-/* - TBD for defragmentaion/reorganization -
- *
- *	xtDelete()
- *
- * function:
- *	delete the entry with the specified key.
- *
- *	N.B.: whole extent of the entry is assumed to be deleted.
- *
- * parameter:
- *
- * return:
- *	ENOENT: if the entry is not found.
- *
- * exception:
- */
-int xtDelete(tid_t tid, struct inode *ip, s64 xoff, s32 xlen, int flag)
-{
-	int rc = 0;
-	struct btstack btstack;
-	int cmp;
-	s64 bn;
-	struct metapage *mp;
-	xtpage_t *p;
-	int index, nextindex;
-	struct tlock *tlck;
-	struct xtlock *xtlck;
-
-	/*
-	 * find the matching entry; xtSearch() pins the page
-	 */
-	if ((rc = xtSearch(ip, xoff, NULL, &cmp, &btstack, 0)))
-		return rc;
-
-	XT_GETSEARCH(ip, btstack.top, bn, mp, p, index);
-	if (cmp) {
-		/* unpin the leaf page */
-		XT_PUTPAGE(mp);
-		return -ENOENT;
-	}
-
-	/*
-	 * delete the entry from the leaf page
-	 */
-	nextindex = le16_to_cpu(p->header.nextindex);
-	le16_add_cpu(&p->header.nextindex, -1);
-
-	/*
-	 * if the leaf page bocome empty, free the page
-	 */
-	if (p->header.nextindex == cpu_to_le16(XTENTRYSTART))
-		return (xtDeleteUp(tid, ip, mp, p, &btstack));
-
-	BT_MARK_DIRTY(mp, ip);
-	/*
-	 * acquire a transaction lock on the leaf page;
-	 *
-	 * action:xad deletion;
-	 */
-	tlck = txLock(tid, ip, mp, tlckXTREE);
-	xtlck = (struct xtlock *) & tlck->lock;
-	xtlck->lwm.offset =
-	    (xtlck->lwm.offset) ? min(index, xtlck->lwm.offset) : index;
-
-	/* if delete from middle, shift left/compact the remaining entries */
-	if (index < nextindex - 1)
-		memmove(&p->xad[index], &p->xad[index + 1],
-			(nextindex - index - 1) * sizeof(xad_t));
-
-	XT_PUTPAGE(mp);
-
-	return 0;
-}
-
-
-/* - TBD for defragmentaion/reorganization -
- *
- *	xtDeleteUp()
- *
- * function:
- *	free empty pages as propagating deletion up the tree
- *
- * parameter:
- *
- * return:
- */
-static int
-xtDeleteUp(tid_t tid, struct inode *ip,
-	   struct metapage * fmp, xtpage_t * fp, struct btstack * btstack)
-{
-	int rc = 0;
-	struct metapage *mp;
-	xtpage_t *p;
-	int index, nextindex;
-	s64 xaddr;
-	int xlen;
-	struct btframe *parent;
-	struct tlock *tlck;
-	struct xtlock *xtlck;
-
-	/*
-	 * keep root leaf page which has become empty
-	 */
-	if (fp->header.flag & BT_ROOT) {
-		/* keep the root page */
-		fp->header.flag &= ~BT_INTERNAL;
-		fp->header.flag |= BT_LEAF;
-		fp->header.nextindex = cpu_to_le16(XTENTRYSTART);
-
-		/* XT_PUTPAGE(fmp); */
-
-		return 0;
-	}
-
-	/*
-	 * free non-root leaf page
-	 */
-	if ((rc = xtRelink(tid, ip, fp))) {
-		XT_PUTPAGE(fmp);
-		return rc;
-	}
-
-	xaddr = addressPXD(&fp->header.self);
-	xlen = lengthPXD(&fp->header.self);
-	/* free the page extent */
-	dbFree(ip, xaddr, (s64) xlen);
-
-	/* free the buffer page */
-	discard_metapage(fmp);
-
-	/*
-	 * propagate page deletion up the index tree
-	 *
-	 * If the delete from the parent page makes it empty,
-	 * continue all the way up the tree.
-	 * stop if the root page is reached (which is never deleted) or
-	 * if the entry deletion does not empty the page.
-	 */
-	while ((parent = BT_POP(btstack)) != NULL) {
-		/* get/pin the parent page <sp> */
-		XT_GETPAGE(ip, parent->bn, mp, PSIZE, p, rc);
-		if (rc)
-			return rc;
-
-		index = parent->index;
-
-		/* delete the entry for the freed child page from parent.
-		 */
-		nextindex = le16_to_cpu(p->header.nextindex);
-
-		/*
-		 * the parent has the single entry being deleted:
-		 * free the parent page which has become empty.
-		 */
-		if (nextindex == 1) {
-			if (p->header.flag & BT_ROOT) {
-				/* keep the root page */
-				p->header.flag &= ~BT_INTERNAL;
-				p->header.flag |= BT_LEAF;
-				p->header.nextindex =
-				    cpu_to_le16(XTENTRYSTART);
-
-				/* XT_PUTPAGE(mp); */
-
-				break;
-			} else {
-				/* free the parent page */
-				if ((rc = xtRelink(tid, ip, p)))
-					return rc;
-
-				xaddr = addressPXD(&p->header.self);
-				/* free the page extent */
-				dbFree(ip, xaddr,
-				       (s64) JFS_SBI(ip->i_sb)->nbperpage);
-
-				/* unpin/free the buffer page */
-				discard_metapage(mp);
-
-				/* propagate up */
-				continue;
-			}
-		}
-		/*
-		 * the parent has other entries remaining:
-		 * delete the router entry from the parent page.
-		 */
-		else {
-			BT_MARK_DIRTY(mp, ip);
-			/*
-			 * acquire a transaction lock on the leaf page;
-			 *
-			 * action:xad deletion;
-			 */
-			tlck = txLock(tid, ip, mp, tlckXTREE);
-			xtlck = (struct xtlock *) & tlck->lock;
-			xtlck->lwm.offset =
-			    (xtlck->lwm.offset) ? min(index,
-						      xtlck->lwm.
-						      offset) : index;
-
-			/* if delete from middle,
-			 * shift left/compact the remaining entries in the page
-			 */
-			if (index < nextindex - 1)
-				memmove(&p->xad[index], &p->xad[index + 1],
-					(nextindex - index -
-					 1) << L2XTSLOTSIZE);
-
-			le16_add_cpu(&p->header.nextindex, -1);
-			jfs_info("xtDeleteUp(entry): 0x%lx[%d]",
-				 (ulong) parent->bn, index);
-		}
-
-		/* unpin the parent page */
-		XT_PUTPAGE(mp);
-
-		/* exit propagation up */
-		break;
-	}
-
-	return 0;
-}
-
-
-/*
- * NAME:	xtRelocate()
- *
- * FUNCTION:	relocate xtpage or data extent of regular file;
- *		This function is mainly used by defragfs utility.
- *
- * NOTE:	This routine does not have the logic to handle
- *		uncommitted allocated extent. The caller should call
- *		txCommit() to commit all the allocation before call
- *		this routine.
- */
-int
-xtRelocate(tid_t tid, struct inode * ip, xad_t * oxad,	/* old XAD */
-	   s64 nxaddr,		/* new xaddr */
-	   int xtype)
-{				/* extent type: XTPAGE or DATAEXT */
-	int rc = 0;
-	struct tblock *tblk;
-	struct tlock *tlck;
-	struct xtlock *xtlck;
-	struct metapage *mp, *pmp, *lmp, *rmp;	/* meta-page buffer */
-	xtpage_t *p, *pp, *rp, *lp;	/* base B+-tree index page */
-	xad_t *xad;
-	pxd_t *pxd;
-	s64 xoff, xsize;
-	int xlen;
-	s64 oxaddr, sxaddr, dxaddr, nextbn, prevbn;
-	cbuf_t *cp;
-	s64 offset, nbytes, nbrd, pno;
-	int nb, npages, nblks;
-	s64 bn;
-	int cmp;
-	int index;
-	struct pxd_lock *pxdlock;
-	struct btstack btstack;	/* traverse stack */
-
-	xtype = xtype & EXTENT_TYPE;
-
-	xoff = offsetXAD(oxad);
-	oxaddr = addressXAD(oxad);
-	xlen = lengthXAD(oxad);
-
-	/* validate extent offset */
-	offset = xoff << JFS_SBI(ip->i_sb)->l2bsize;
-	if (offset >= ip->i_size)
-		return -ESTALE;	/* stale extent */
-
-	jfs_info("xtRelocate: xtype:%d xoff:0x%lx xlen:0x%x xaddr:0x%lx:0x%lx",
-		 xtype, (ulong) xoff, xlen, (ulong) oxaddr, (ulong) nxaddr);
-
-	/*
-	 *	1. get and validate the parent xtpage/xad entry
-	 *	covering the source extent to be relocated;
-	 */
-	if (xtype == DATAEXT) {
-		/* search in leaf entry */
-		rc = xtSearch(ip, xoff, NULL, &cmp, &btstack, 0);
-		if (rc)
-			return rc;
-
-		/* retrieve search result */
-		XT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
-
-		if (cmp) {
-			XT_PUTPAGE(pmp);
-			return -ESTALE;
-		}
-
-		/* validate for exact match with a single entry */
-		xad = &pp->xad[index];
-		if (addressXAD(xad) != oxaddr || lengthXAD(xad) != xlen) {
-			XT_PUTPAGE(pmp);
-			return -ESTALE;
-		}
-	} else {		/* (xtype == XTPAGE) */
-
-		/* search in internal entry */
-		rc = xtSearchNode(ip, oxad, &cmp, &btstack, 0);
-		if (rc)
-			return rc;
-
-		/* retrieve search result */
-		XT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
-
-		if (cmp) {
-			XT_PUTPAGE(pmp);
-			return -ESTALE;
-		}
-
-		/* xtSearchNode() validated for exact match with a single entry
-		 */
-		xad = &pp->xad[index];
-	}
-	jfs_info("xtRelocate: parent xad entry validated.");
-
-	/*
-	 *	2. relocate the extent
-	 */
-	if (xtype == DATAEXT) {
-		/* if the extent is allocated-but-not-recorded
-		 * there is no real data to be moved in this extent,
-		 */
-		if (xad->flag & XAD_NOTRECORDED)
-			goto out;
-		else
-			/* release xtpage for cmRead()/xtLookup() */
-			XT_PUTPAGE(pmp);
-
-		/*
-		 *	cmRelocate()
-		 *
-		 * copy target data pages to be relocated;
-		 *
-		 * data extent must start at page boundary and
-		 * multiple of page size (except the last data extent);
-		 * read in each page of the source data extent into cbuf,
-		 * update the cbuf extent descriptor of the page to be
-		 * homeward bound to new dst data extent
-		 * copy the data from the old extent to new extent.
-		 * copy is essential for compressed files to avoid problems
-		 * that can arise if there was a change in compression
-		 * algorithms.
-		 * it is a good strategy because it may disrupt cache
-		 * policy to keep the pages in memory afterwards.
-		 */
-		offset = xoff << JFS_SBI(ip->i_sb)->l2bsize;
-		assert((offset & CM_OFFSET) == 0);
-		nbytes = xlen << JFS_SBI(ip->i_sb)->l2bsize;
-		pno = offset >> CM_L2BSIZE;
-		npages = (nbytes + (CM_BSIZE - 1)) >> CM_L2BSIZE;
-/*
-		npages = ((offset + nbytes - 1) >> CM_L2BSIZE) -
-			  (offset >> CM_L2BSIZE) + 1;
-*/
-		sxaddr = oxaddr;
-		dxaddr = nxaddr;
-
-		/* process the request one cache buffer at a time */
-		for (nbrd = 0; nbrd < nbytes; nbrd += nb,
-		     offset += nb, pno++, npages--) {
-			/* compute page size */
-			nb = min(nbytes - nbrd, CM_BSIZE);
-
-			/* get the cache buffer of the page */
-			if (rc = cmRead(ip, offset, npages, &cp))
-				break;
-
-			assert(addressPXD(&cp->cm_pxd) == sxaddr);
-			assert(!cp->cm_modified);
-
-			/* bind buffer with the new extent address */
-			nblks = nb >> JFS_IP(ip->i_sb)->l2bsize;
-			cmSetXD(ip, cp, pno, dxaddr, nblks);
-
-			/* release the cbuf, mark it as modified */
-			cmPut(cp, true);
-
-			dxaddr += nblks;
-			sxaddr += nblks;
-		}
-
-		/* get back parent page */
-		if ((rc = xtSearch(ip, xoff, NULL, &cmp, &btstack, 0)))
-			return rc;
-
-		XT_GETSEARCH(ip, btstack.top, bn, pmp, pp, index);
-		jfs_info("xtRelocate: target data extent relocated.");
-	} else {		/* (xtype == XTPAGE) */
-
-		/*
-		 * read in the target xtpage from the source extent;
-		 */
-		XT_GETPAGE(ip, oxaddr, mp, PSIZE, p, rc);
-		if (rc) {
-			XT_PUTPAGE(pmp);
-			return rc;
-		}
-
-		/*
-		 * read in sibling pages if any to update sibling pointers;
-		 */
-		rmp = NULL;
-		if (p->header.next) {
-			nextbn = le64_to_cpu(p->header.next);
-			XT_GETPAGE(ip, nextbn, rmp, PSIZE, rp, rc);
-			if (rc) {
-				XT_PUTPAGE(pmp);
-				XT_PUTPAGE(mp);
-				return (rc);
-			}
-		}
-
-		lmp = NULL;
-		if (p->header.prev) {
-			prevbn = le64_to_cpu(p->header.prev);
-			XT_GETPAGE(ip, prevbn, lmp, PSIZE, lp, rc);
-			if (rc) {
-				XT_PUTPAGE(pmp);
-				XT_PUTPAGE(mp);
-				if (rmp)
-					XT_PUTPAGE(rmp);
-				return (rc);
-			}
-		}
-
-		/* at this point, all xtpages to be updated are in memory */
-
-		/*
-		 * update sibling pointers of sibling xtpages if any;
-		 */
-		if (lmp) {
-			BT_MARK_DIRTY(lmp, ip);
-			tlck = txLock(tid, ip, lmp, tlckXTREE | tlckRELINK);
-			lp->header.next = cpu_to_le64(nxaddr);
-			XT_PUTPAGE(lmp);
-		}
-
-		if (rmp) {
-			BT_MARK_DIRTY(rmp, ip);
-			tlck = txLock(tid, ip, rmp, tlckXTREE | tlckRELINK);
-			rp->header.prev = cpu_to_le64(nxaddr);
-			XT_PUTPAGE(rmp);
-		}
-
-		/*
-		 * update the target xtpage to be relocated
-		 *
-		 * update the self address of the target page
-		 * and write to destination extent;
-		 * redo image covers the whole xtpage since it is new page
-		 * to the destination extent;
-		 * update of bmap for the free of source extent
-		 * of the target xtpage itself:
-		 * update of bmap for the allocation of destination extent
-		 * of the target xtpage itself:
-		 * update of bmap for the extents covered by xad entries in
-		 * the target xtpage is not necessary since they are not
-		 * updated;
-		 * if not committed before this relocation,
-		 * target page may contain XAD_NEW entries which must
-		 * be scanned for bmap update (logredo() always
-		 * scan xtpage REDOPAGE image for bmap update);
-		 * if committed before this relocation (tlckRELOCATE),
-		 * scan may be skipped by commit() and logredo();
-		 */
-		BT_MARK_DIRTY(mp, ip);
-		/* tlckNEW init xtlck->lwm.offset = XTENTRYSTART; */
-		tlck = txLock(tid, ip, mp, tlckXTREE | tlckNEW);
-		xtlck = (struct xtlock *) & tlck->lock;
-
-		/* update the self address in the xtpage header */
-		pxd = &p->header.self;
-		PXDaddress(pxd, nxaddr);
-
-		/* linelock for the after image of the whole page */
-		xtlck->lwm.length =
-		    le16_to_cpu(p->header.nextindex) - xtlck->lwm.offset;
-
-		/* update the buffer extent descriptor of target xtpage */
-		xsize = xlen << JFS_SBI(ip->i_sb)->l2bsize;
-		bmSetXD(mp, nxaddr, xsize);
-
-		/* unpin the target page to new homeward bound */
-		XT_PUTPAGE(mp);
-		jfs_info("xtRelocate: target xtpage relocated.");
-	}
-
-	/*
-	 *	3. acquire maplock for the source extent to be freed;
-	 *
-	 * acquire a maplock saving the src relocated extent address;
-	 * to free of the extent at commit time;
-	 */
-      out:
-	/* if DATAEXT relocation, write a LOG_UPDATEMAP record for
-	 * free PXD of the source data extent (logredo() will update
-	 * bmap for free of source data extent), and update bmap for
-	 * free of the source data extent;
-	 */
-	if (xtype == DATAEXT)
-		tlck = txMaplock(tid, ip, tlckMAP);
-	/* if XTPAGE relocation, write a LOG_NOREDOPAGE record
-	 * for the source xtpage (logredo() will init NoRedoPage
-	 * filter and will also update bmap for free of the source
-	 * xtpage), and update bmap for free of the source xtpage;
-	 * N.B. We use tlckMAP instead of tlkcXTREE because there
-	 *      is no buffer associated with this lock since the buffer
-	 *      has been redirected to the target location.
-	 */
-	else			/* (xtype == XTPAGE) */
-		tlck = txMaplock(tid, ip, tlckMAP | tlckRELOCATE);
-
-	pxdlock = (struct pxd_lock *) & tlck->lock;
-	pxdlock->flag = mlckFREEPXD;
-	PXDaddress(&pxdlock->pxd, oxaddr);
-	PXDlength(&pxdlock->pxd, xlen);
-	pxdlock->index = 1;
-
-	/*
-	 *	4. update the parent xad entry for relocation;
-	 *
-	 * acquire tlck for the parent entry with XAD_NEW as entry
-	 * update which will write LOG_REDOPAGE and update bmap for
-	 * allocation of XAD_NEW destination extent;
-	 */
-	jfs_info("xtRelocate: update parent xad entry.");
-	BT_MARK_DIRTY(pmp, ip);
-	tlck = txLock(tid, ip, pmp, tlckXTREE | tlckGROW);
-	xtlck = (struct xtlock *) & tlck->lock;
-
-	/* update the XAD with the new destination extent; */
-	xad = &pp->xad[index];
-	xad->flag |= XAD_NEW;
-	XADaddress(xad, nxaddr);
-
-	xtlck->lwm.offset = min(index, xtlck->lwm.offset);
-	xtlck->lwm.length = le16_to_cpu(pp->header.nextindex) -
-	    xtlck->lwm.offset;
-
-	/* unpin the parent xtpage */
-	XT_PUTPAGE(pmp);
-
-	return rc;
-}
-
-
-/*
- *	xtSearchNode()
- *
- * function:	search for the internal xad entry covering specified extent.
- *		This function is mainly used by defragfs utility.
- *
- * parameters:
- *	ip	- file object;
- *	xad	- extent to find;
- *	cmpp	- comparison result:
- *	btstack - traverse stack;
- *	flag	- search process flag;
- *
- * returns:
- *	btstack contains (bn, index) of search path traversed to the entry.
- *	*cmpp is set to result of comparison with the entry returned.
- *	the page containing the entry is pinned at exit.
- */
-static int xtSearchNode(struct inode *ip, xad_t * xad,	/* required XAD entry */
-			int *cmpp, struct btstack * btstack, int flag)
-{
-	int rc = 0;
-	s64 xoff, xaddr;
-	int xlen;
-	int cmp = 1;		/* init for empty page */
-	s64 bn;			/* block number */
-	struct metapage *mp;	/* meta-page buffer */
-	xtpage_t *p;		/* page */
-	int base, index, lim;
-	struct btframe *btsp;
-	s64 t64;
-
-	BT_CLR(btstack);
-
-	xoff = offsetXAD(xad);
-	xlen = lengthXAD(xad);
-	xaddr = addressXAD(xad);
-
-	/*
-	 *	search down tree from root:
-	 *
-	 * between two consecutive entries of <Ki, Pi> and <Kj, Pj> of
-	 * internal page, child page Pi contains entry with k, Ki <= K < Kj.
-	 *
-	 * if entry with search key K is not found
-	 * internal page search find the entry with largest key Ki
-	 * less than K which point to the child page to search;
-	 * leaf page search find the entry with smallest key Kj
-	 * greater than K so that the returned index is the position of
-	 * the entry to be shifted right for insertion of new entry.
-	 * for empty tree, search key is greater than any key of the tree.
-	 *
-	 * by convention, root bn = 0.
-	 */
-	for (bn = 0;;) {
-		/* get/pin the page to search */
-		XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
-		if (rc)
-			return rc;
-		if (p->header.flag & BT_LEAF) {
-			XT_PUTPAGE(mp);
-			return -ESTALE;
-		}
-
-		lim = le16_to_cpu(p->header.nextindex) - XTENTRYSTART;
-
-		/*
-		 * binary search with search key K on the current page
-		 */
-		for (base = XTENTRYSTART; lim; lim >>= 1) {
-			index = base + (lim >> 1);
-
-			XT_CMP(cmp, xoff, &p->xad[index], t64);
-			if (cmp == 0) {
-				/*
-				 *	search hit
-				 *
-				 * verify for exact match;
-				 */
-				if (xaddr == addressXAD(&p->xad[index]) &&
-				    xoff == offsetXAD(&p->xad[index])) {
-					*cmpp = cmp;
-
-					/* save search result */
-					btsp = btstack->top;
-					btsp->bn = bn;
-					btsp->index = index;
-					btsp->mp = mp;
-
-					return 0;
-				}
-
-				/* descend/search its child page */
-				goto next;
-			}
-
-			if (cmp > 0) {
-				base = index + 1;
-				--lim;
-			}
-		}
-
-		/*
-		 *	search miss - non-leaf page:
-		 *
-		 * base is the smallest index with key (Kj) greater than
-		 * search key (K) and may be zero or maxentry index.
-		 * if base is non-zero, decrement base by one to get the parent
-		 * entry of the child page to search.
-		 */
-		index = base ? base - 1 : base;
-
-		/*
-		 * go down to child page
-		 */
-	      next:
-		/* get the child page block number */
-		bn = addressXAD(&p->xad[index]);
-
-		/* unpin the parent page */
-		XT_PUTPAGE(mp);
-	}
-}
-
-
-/*
- *	xtRelink()
- *
- * function:
- *	link around a freed page.
- *
- * Parameter:
- *	int		tid,
- *	struct inode	*ip,
- *	xtpage_t	*p)
- *
- * returns:
- */
-static int xtRelink(tid_t tid, struct inode *ip, xtpage_t * p)
-{
-	int rc = 0;
-	struct metapage *mp;
-	s64 nextbn, prevbn;
-	struct tlock *tlck;
-
-	nextbn = le64_to_cpu(p->header.next);
-	prevbn = le64_to_cpu(p->header.prev);
-
-	/* update prev pointer of the next page */
-	if (nextbn != 0) {
-		XT_GETPAGE(ip, nextbn, mp, PSIZE, p, rc);
-		if (rc)
-			return rc;
-
-		/*
-		 * acquire a transaction lock on the page;
-		 *
-		 * action: update prev pointer;
-		 */
-		BT_MARK_DIRTY(mp, ip);
-		tlck = txLock(tid, ip, mp, tlckXTREE | tlckRELINK);
-
-		/* the page may already have been tlock'd */
-
-		p->header.prev = cpu_to_le64(prevbn);
-
-		XT_PUTPAGE(mp);
-	}
-
-	/* update next pointer of the previous page */
-	if (prevbn != 0) {
-		XT_GETPAGE(ip, prevbn, mp, PSIZE, p, rc);
-		if (rc)
-			return rc;
-
-		/*
-		 * acquire a transaction lock on the page;
-		 *
-		 * action: update next pointer;
-		 */
-		BT_MARK_DIRTY(mp, ip);
-		tlck = txLock(tid, ip, mp, tlckXTREE | tlckRELINK);
-
-		/* the page may already have been tlock'd */
-
-		p->header.next = le64_to_cpu(nextbn);
-
-		XT_PUTPAGE(mp);
-	}
-
-	return 0;
-}
-#endif				/*  _STILL_TO_PORT */
-
 
 /*
  *	xtInitRoot()
diff --git a/fs/jfs/jfs_xtree.h b/fs/jfs/jfs_xtree.h
index 5f51be8596b3..142caafc73b1 100644
--- a/fs/jfs/jfs_xtree.h
+++ b/fs/jfs/jfs_xtree.h
@@ -95,10 +95,6 @@ extern int xtInsert(tid_t tid, struct inode *ip,
 		    int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
 extern int xtExtend(tid_t tid, struct inode *ip, s64 xoff, int xlen,
 		    int flag);
-#ifdef _NOTYET
-extern int xtTailgate(tid_t tid, struct inode *ip,
-		      s64 xoff, int xlen, s64 xaddr, int flag);
-#endif
 extern int xtUpdate(tid_t tid, struct inode *ip, struct xad *nxad);
 extern int xtDelete(tid_t tid, struct inode *ip, s64 xoff, int xlen,
 		    int flag);