diff --git a/fs/xfs/xfs_arch.h b/fs/xfs/xfs_arch.h
index f1aeda5..71de20ce 100644
--- a/fs/xfs/xfs_arch.h
+++ b/fs/xfs/xfs_arch.h
@@ -202,7 +202,7 @@
  */ 
 
 #define XFS_GET_DIR_INO4(di) \
-	(((u32)(di).i[0] << 24) | ((di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
+	(((__u32)(di).i[0] << 24) | ((di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
 
 #define XFS_PUT_DIR_INO4(from, di) \
 do { \
@@ -213,9 +213,9 @@
 } while (0)
 
 #define XFS_DI_HI(di) \
-	(((u32)(di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
+	(((__u32)(di).i[1] << 16) | ((di).i[2] << 8) | ((di).i[3]))
 #define XFS_DI_LO(di) \
-	(((u32)(di).i[4] << 24) | ((di).i[5] << 16) | ((di).i[6] << 8) | ((di).i[7]))
+	(((__u32)(di).i[4] << 24) | ((di).i[5] << 16) | ((di).i[6] << 8) | ((di).i[7]))
 
 #define XFS_GET_DIR_INO8(di)        \
 	(((xfs_ino_t)XFS_DI_LO(di) & 0xffffffffULL) | \
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 8ac170b..34bfb8a 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -3653,14 +3653,16 @@
 
 	ep = xfs_bmap_do_search_extents(base, lastx, nextents, bno, eofp,
 					  lastxp, gotp, prevp);
-	rt = ip->i_d.di_flags & XFS_DIFLAG_REALTIME;
-	if(!rt && !gotp->br_startblock && (*lastxp != NULLEXTNUM)) {
+	rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip);
+	if (unlikely(!rt && !gotp->br_startblock && (*lastxp != NULLEXTNUM))) {
                 cmn_err(CE_PANIC,"Access to block zero: fs: <%s> inode: %lld "
 			"start_block : %llx start_off : %llx blkcnt : %llx "
 			"extent-state : %x \n",
-			(ip->i_mount)->m_fsname,(long long)ip->i_ino,
-			gotp->br_startblock, gotp->br_startoff,
-			gotp->br_blockcount,gotp->br_state);
+			(ip->i_mount)->m_fsname, (long long)ip->i_ino,
+			(unsigned long long)gotp->br_startblock,
+			(unsigned long long)gotp->br_startoff,
+			(unsigned long long)gotp->br_blockcount,
+			gotp->br_state);
         }
         return ep;
 }
@@ -4883,19 +4885,18 @@
 					error = xfs_mod_incore_sb(mp,
 							XFS_SBS_FDBLOCKS,
 							-(indlen), rsvd);
-					if (error && rt) {
-						xfs_mod_incore_sb(ip->i_mount,
+					if (error && rt)
+						xfs_mod_incore_sb(mp,
 							XFS_SBS_FREXTENTS,
 							extsz, rsvd);
-					} else if (error) {
-						xfs_mod_incore_sb(ip->i_mount,
+					else if (error)
+						xfs_mod_incore_sb(mp,
 							XFS_SBS_FDBLOCKS,
 							alen, rsvd);
-					}
 				}
 
 				if (error) {
-					if (XFS_IS_QUOTA_ON(ip->i_mount))
+					if (XFS_IS_QUOTA_ON(mp))
 						/* unreserve the blocks now */
 						(void)
 						XFS_TRANS_UNRESERVE_QUOTA_NBLKS(
diff --git a/fs/xfs/xfs_dinode.h b/fs/xfs/xfs_dinode.h
index f697aab..79d0d9e 100644
--- a/fs/xfs/xfs_dinode.h
+++ b/fs/xfs/xfs_dinode.h
@@ -199,10 +199,16 @@
 
 #define XFS_DFORK_DSIZE(dip,mp) \
 	XFS_CFORK_DSIZE_DISK(&(dip)->di_core, mp)
+#define XFS_DFORK_DSIZE_HOST(dip,mp) \
+	XFS_CFORK_DSIZE(&(dip)->di_core, mp)
 #define XFS_DFORK_ASIZE(dip,mp) \
 	XFS_CFORK_ASIZE_DISK(&(dip)->di_core, mp)
+#define XFS_DFORK_ASIZE_HOST(dip,mp) \
+	XFS_CFORK_ASIZE(&(dip)->di_core, mp)
 #define	XFS_DFORK_SIZE(dip,mp,w) \
 	XFS_CFORK_SIZE_DISK(&(dip)->di_core, mp, w)
+#define	XFS_DFORK_SIZE_HOST(dip,mp,w) \
+	XFS_CFORK_SIZE(&(dip)->di_core, mp, w)
 
 #define	XFS_DFORK_Q(dip)                    XFS_CFORK_Q_DISK(&(dip)->di_core)
 #define	XFS_DFORK_BOFF(dip)		    XFS_CFORK_BOFF_DISK(&(dip)->di_core)
@@ -216,6 +222,7 @@
 #define	XFS_CFORK_FMT_SET(dcp,w,n) \
 	((w) == XFS_DATA_FORK ? \
 		((dcp)->di_format = (n)) : ((dcp)->di_aformat = (n)))
+#define	XFS_DFORK_FORMAT(dip,w) XFS_CFORK_FORMAT(&(dip)->di_core, w)
 
 #define	XFS_CFORK_NEXTENTS_DISK(dcp,w) \
 	((w) == XFS_DATA_FORK ? \
@@ -223,13 +230,13 @@
 	 	INT_GET((dcp)->di_anextents, ARCH_CONVERT))
 #define XFS_CFORK_NEXTENTS(dcp,w) \
 	((w) == XFS_DATA_FORK ? (dcp)->di_nextents : (dcp)->di_anextents)
+#define	XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
+#define	XFS_DFORK_NEXTENTS_HOST(dip,w) XFS_CFORK_NEXTENTS(&(dip)->di_core, w)
 
 #define	XFS_CFORK_NEXT_SET(dcp,w,n) \
 	((w) == XFS_DATA_FORK ? \
 		((dcp)->di_nextents = (n)) : ((dcp)->di_anextents = (n)))
 
-#define	XFS_DFORK_NEXTENTS(dip,w) XFS_CFORK_NEXTENTS_DISK(&(dip)->di_core, w)
-
 #define	XFS_BUF_TO_DINODE(bp)	((xfs_dinode_t *)XFS_BUF_PTR(bp))
 
 /*
diff --git a/fs/xfs/xfs_dir.h b/fs/xfs/xfs_dir.h
index 488defe..8cc8afb 100644
--- a/fs/xfs/xfs_dir.h
+++ b/fs/xfs/xfs_dir.h
@@ -135,6 +135,8 @@
 	((mp)->m_dirops.xd_shortform_to_single(args))
 
 #define	XFS_DIR_IS_V1(mp)	((mp)->m_dirversion == 1)
+#define	XFS_DIR_IS_V2(mp)	((mp)->m_dirversion == 2)
 extern xfs_dirops_t xfsv1_dirops;
+extern xfs_dirops_t xfsv2_dirops;
 
 #endif	/* __XFS_DIR_H__ */
diff --git a/fs/xfs/xfs_dir2.h b/fs/xfs/xfs_dir2.h
index 7e24ffe..3158f5d 100644
--- a/fs/xfs/xfs_dir2.h
+++ b/fs/xfs/xfs_dir2.h
@@ -72,9 +72,6 @@
 	struct uio	*uio;		/* uio control structure */
 } xfs_dir2_put_args_t;
 
-#define	XFS_DIR_IS_V2(mp)	((mp)->m_dirversion == 2)
-extern xfs_dirops_t	xfsv2_dirops;
-
 /*
  * Other interfaces used by the rest of the dir v2 code.
  */
diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 3280f49..14010f1 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -3,15 +3,15 @@
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it would be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
+ * You should have received a copy of the GNU Lesser General Public License
  * along with this program; if not, write the Free Software Foundation,
  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 5ecf3e3..d72c83d 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -608,6 +608,7 @@
 	count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
 	while (count_fsb > 0) {
 		imaps = nimaps;
+		firstblock = NULLFSBLOCK;
 		error = XFS_BMAPI(mp, NULL, io, start_fsb, count_fsb,
 				  0, &firstblock, 0, imap, &imaps, NULL);
 		if (error)
diff --git a/fs/xfs/xfs_sb.h b/fs/xfs/xfs_sb.h
index 4a17d33..bf168a9 100644
--- a/fs/xfs/xfs_sb.h
+++ b/fs/xfs/xfs_sb.h
@@ -68,18 +68,6 @@
 	(XFS_SB_VERSION_NUMBITS | \
 	 XFS_SB_VERSION_OKREALFBITS | \
 	 XFS_SB_VERSION_OKSASHFBITS)
-#define XFS_SB_VERSION_MKFS(ia,dia,extflag,dirv2,na,sflag,morebits)	\
-	(((ia) || (dia) || (extflag) || (dirv2) || (na) || (sflag) || \
-	  (morebits)) ? \
-		(XFS_SB_VERSION_4 | \
-		 ((ia) ? XFS_SB_VERSION_ALIGNBIT : 0) | \
-		 ((dia) ? XFS_SB_VERSION_DALIGNBIT : 0) | \
-		 ((extflag) ? XFS_SB_VERSION_EXTFLGBIT : 0) | \
-		 ((dirv2) ? XFS_SB_VERSION_DIRV2BIT : 0) | \
-		 ((na) ? XFS_SB_VERSION_LOGV2BIT : 0) | \
-		 ((sflag) ? XFS_SB_VERSION_SECTORBIT : 0) | \
-		 ((morebits) ? XFS_SB_VERSION_MOREBITSBIT : 0)) : \
-		XFS_SB_VERSION_1)
 
 /*
  * There are two words to hold XFS "feature" bits: the original
@@ -105,11 +93,6 @@
 	(XFS_SB_VERSION2_OKREALFBITS |	\
 	 XFS_SB_VERSION2_OKSASHFBITS )
 
-/*
- * mkfs macro to set up sb_features2 word
- */
-#define	XFS_SB_VERSION2_MKFS(resvd1, sbcntr)	0
-
 typedef struct xfs_sb
 {
 	__uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index a889963..d77901c 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -973,7 +973,6 @@
 void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
-void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
 void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index f6aed9e..15734c5 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -4056,7 +4056,7 @@
 		xfs_fileoff_t	s, e;
 
 		/*
-		 * Determine space reservations for data/realtime,
+		 * Determine space reservations for data/realtime.
 		 */
 		if (unlikely(extsz)) {
 			s = startoffset_fsb;