[XFS] kill xfs_iocore_t

xfs_iocore_t is a structure embedded in xfs_inode. Except for one field it
just duplicates fields already in xfs_inode, and there is nothing this
abstraction buys us on XFS/Linux. This patch removes it and shrinks source
and binary size of xfs aswell as shrinking the size of xfs_inode by 60/44
bytes in debug/non-debug builds.

SGI-PV: 970852
SGI-Modid: xfs-linux-melb:xfs-kern:29754a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

13 files changed, 54 insertions, 211 deletions

diff --git a/fs/xfs/Makefile-linux-2.6 b/fs/xfs/Makefile-linux-2.6
index d1491aa..9731645 100644
--- a/fs/xfs/Makefile-linux-2.6
+++ b/fs/xfs/Makefile-linux-2.6
@@ -70,7 +70,6 @@ xfs-y				+= xfs_alloc.o \
 				   xfs_iget.o \
 				   xfs_inode.o \
 				   xfs_inode_item.o \
-				   xfs_iocore.o \
 				   xfs_iomap.o \
 				   xfs_itable.o \
 				   xfs_dfrag.o \
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index d20df39..36dadc4 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -163,7 +163,7 @@ xfs_destroy_ioend(
 /*
  * Update on-disk file size now that data has been written to disk.
  * The current in-memory file size is i_size.  If a write is beyond
- * eof io_new_size will be the intended file size until i_size is
+ * eof i_new_size will be the intended file size until i_size is
  * updated.  If this write does not extend all the way to the valid
  * file size then restrict this update to the end of the write.
  */
@@ -185,7 +185,7 @@ xfs_setfilesize(
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 
-	isize = MAX(ip->i_size, ip->i_iocore.io_new_size);
+	isize = MAX(ip->i_size, ip->i_new_size);
 	isize = MIN(isize, bsize);
 
 	if (ip->i_d.di_size < isize) {
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 0abc7d05..459d364 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -58,14 +58,12 @@
 void
 xfs_rw_enter_trace(
 	int			tag,
-	xfs_iocore_t		*io,
+	xfs_inode_t		*ip,
 	void			*data,
 	size_t			segs,
 	loff_t			offset,
 	int			ioflags)
 {
-	xfs_inode_t	*ip = XFS_IO_INODE(io);
-
 	if (ip->i_rwtrace == NULL)
 		return;
 	ktrace_enter(ip->i_rwtrace,
@@ -78,8 +76,8 @@ xfs_rw_enter_trace(
 		(void *)((unsigned long)((offset >> 32) & 0xffffffff)),
 		(void *)((unsigned long)(offset & 0xffffffff)),
 		(void *)((unsigned long)ioflags),
-		(void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)),
-		(void *)((unsigned long)(io->io_new_size & 0xffffffff)),
+		(void *)((unsigned long)((ip->i_new_size >> 32) & 0xffffffff)),
+		(void *)((unsigned long)(ip->i_new_size & 0xffffffff)),
 		(void *)((unsigned long)current_pid()),
 		(void *)NULL,
 		(void *)NULL,
@@ -89,13 +87,12 @@ xfs_rw_enter_trace(
 
 void
 xfs_inval_cached_trace(
-	xfs_iocore_t	*io,
+	xfs_inode_t	*ip,
 	xfs_off_t	offset,
 	xfs_off_t	len,
 	xfs_off_t	first,
 	xfs_off_t	last)
 {
-	xfs_inode_t	*ip = XFS_IO_INODE(io);
 
 	if (ip->i_rwtrace == NULL)
 		return;
@@ -256,7 +253,7 @@ xfs_read(
 		}
 	}
 
-	xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
+	xfs_rw_enter_trace(XFS_READ_ENTER, ip,
 				(void *)iovp, segs, *offset, ioflags);
 
 	iocb->ki_pos = *offset;
@@ -301,7 +298,7 @@ xfs_splice_read(
 			return -error;
 		}
 	}
-	xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore,
+	xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, ip,
 			   pipe, count, *ppos, ioflags);
 	ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
 	if (ret > 0)
@@ -323,7 +320,6 @@ xfs_splice_write(
 {
 	bhv_vnode_t		*vp = XFS_ITOV(ip);
 	xfs_mount_t		*mp = ip->i_mount;
-	xfs_iocore_t		*io = &ip->i_iocore;
 	ssize_t			ret;
 	struct inode		*inode = outfilp->f_mapping->host;
 	xfs_fsize_t		isize, new_size;
@@ -350,10 +346,10 @@ xfs_splice_write(
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	if (new_size > ip->i_size)
-		io->io_new_size = new_size;
+		ip->i_new_size = new_size;
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
-	xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore,
+	xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, ip,
 			   pipe, count, *ppos, ioflags);
 	ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags);
 	if (ret > 0)
@@ -370,9 +366,9 @@ xfs_splice_write(
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	}
 
-	if (io->io_new_size) {
+	if (ip->i_new_size) {
 		xfs_ilock(ip, XFS_ILOCK_EXCL);
-		io->io_new_size = 0;
+		ip->i_new_size = 0;
 		if (ip->i_d.di_size > ip->i_size)
 			ip->i_d.di_size = ip->i_size;
 		xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -461,20 +457,19 @@ xfs_zero_eof(
 	xfs_off_t	offset,		/* starting I/O offset */
 	xfs_fsize_t	isize)		/* current inode size */
 {
-	xfs_iocore_t	*io = &ip->i_iocore;
+	xfs_mount_t	*mp = ip->i_mount;
 	xfs_fileoff_t	start_zero_fsb;
 	xfs_fileoff_t	end_zero_fsb;
 	xfs_fileoff_t	zero_count_fsb;
 	xfs_fileoff_t	last_fsb;
 	xfs_fileoff_t	zero_off;
 	xfs_fsize_t	zero_len;
-	xfs_mount_t	*mp = io->io_mount;
 	int		nimaps;
 	int		error = 0;
 	xfs_bmbt_irec_t	imap;
 
-	ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-	ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+	ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+	ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
 	ASSERT(offset > isize);
 
 	/*
@@ -483,8 +478,8 @@ xfs_zero_eof(
 	 */
 	error = xfs_zero_last_block(ip, offset, isize);
 	if (error) {
-		ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-		ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+		ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+		ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
 		return error;
 	}
 
@@ -515,8 +510,8 @@ xfs_zero_eof(
 		error = xfs_bmapi(NULL, ip, start_zero_fsb, zero_count_fsb,
 				  0, NULL, 0, &imap, &nimaps, NULL, NULL);
 		if (error) {
-			ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-			ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+			ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+			ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
 			return error;
 		}
 		ASSERT(nimaps > 0);
@@ -584,7 +579,6 @@ xfs_write(
 	xfs_mount_t		*mp;
 	ssize_t			ret = 0, error = 0;
 	xfs_fsize_t		isize, new_size;
-	xfs_iocore_t		*io;
 	int			iolock;
 	int			eventsent = 0;
 	bhv_vrwlock_t		locktype;
@@ -604,8 +598,7 @@ xfs_write(
 	if (count == 0)
 		return 0;
 
-	io = &xip->i_iocore;
-	mp = io->io_mount;
+	mp = xip->i_mount;
 
 	xfs_wait_for_freeze(mp, SB_FREEZE_WRITE);
 
@@ -685,7 +678,7 @@ start:
 
 	new_size = pos + count;
 	if (new_size > xip->i_size)
-		io->io_new_size = new_size;
+		xip->i_new_size = new_size;
 
 	if (likely(!(ioflags & IO_INVIS))) {
 		file_update_time(file);
@@ -737,7 +730,7 @@ retry:
 	if ((ioflags & IO_ISDIRECT)) {
 		if (VN_CACHED(vp)) {
 			WARN_ON(need_i_mutex == 0);
-			xfs_inval_cached_trace(io, pos, -1,
+			xfs_inval_cached_trace(xip, pos, -1,
 					ctooff(offtoct(pos)), -1);
 			error = xfs_flushinval_pages(xip,
 					ctooff(offtoct(pos)),
@@ -756,7 +749,7 @@ retry:
 			need_i_mutex = 0;
 		}
 
- 		xfs_rw_enter_trace(XFS_DIOWR_ENTER, io, (void *)iovp, segs,
+ 		xfs_rw_enter_trace(XFS_DIOWR_ENTER, xip, (void *)iovp, segs,
 				*offset, ioflags);
 		ret = generic_file_direct_write(iocb, iovp,
 				&segs, pos, offset, count, ocount);
@@ -776,7 +769,7 @@ retry:
 			goto relock;
 		}
 	} else {
-		xfs_rw_enter_trace(XFS_WRITE_ENTER, io, (void *)iovp, segs,
+		xfs_rw_enter_trace(XFS_WRITE_ENTER, xip, (void *)iovp, segs,
 				*offset, ioflags);
 		ret = generic_file_buffered_write(iocb, iovp, segs,
 				pos, offset, count, ret);
@@ -840,9 +833,9 @@ retry:
 	}
 
  out_unlock_internal:
-	if (io->io_new_size) {
+	if (xip->i_new_size) {
 		xfs_ilock(xip, XFS_ILOCK_EXCL);
-		io->io_new_size = 0;
+		xip->i_new_size = 0;
 		/*
 		 * If this was a direct or synchronous I/O that failed (such
 		 * as ENOSPC) then part of the I/O may have been written to
diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h
index a982fbc..e200253 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.h
+++ b/fs/xfs/linux-2.6/xfs_lrw.h
@@ -19,7 +19,6 @@
 #define __XFS_LRW_H__
 
 struct xfs_mount;
-struct xfs_iocore;
 struct xfs_inode;
 struct xfs_bmbt_irec;
 struct xfs_buf;
@@ -60,13 +59,13 @@ struct xfs_iomap;
 #define	XFS_IOMAP_UNWRITTEN	27
 #define XFS_SPLICE_READ_ENTER	28
 #define XFS_SPLICE_WRITE_ENTER	29
-extern void xfs_rw_enter_trace(int, struct xfs_iocore *,
-				void *, size_t, loff_t, int);
-extern void xfs_inval_cached_trace(struct xfs_iocore *,
-				xfs_off_t, xfs_off_t, xfs_off_t, xfs_off_t);
+extern void xfs_rw_enter_trace(int, struct xfs_inode *,
+		void *, size_t, loff_t, int);
+extern void xfs_inval_cached_trace(struct xfs_inode *,
+		xfs_off_t, xfs_off_t, xfs_off_t, xfs_off_t);
 #else
-#define xfs_rw_enter_trace(tag, io, data, size, offset, ioflags)
-#define xfs_inval_cached_trace(io, offset, len, first, last)
+#define xfs_rw_enter_trace(tag, ip, data, size, offset, ioflags)
+#define xfs_inval_cached_trace(ip, offset, len, first, last)
 #endif
 
 extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);
diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index 39c4480..4ad29cb 100644
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -199,7 +199,7 @@ xfs_swap_extents(
 	}
 
 	if (VN_CACHED(tvp) != 0) {
-		xfs_inval_cached_trace(&tip->i_iocore, 0, -1, 0, -1);
+		xfs_inval_cached_trace(tip, 0, -1, 0, -1);
 		error = xfs_flushinval_pages(tip, 0, -1,
 				FI_REMAPF_LOCKED);
 		if (error)
diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index f77bda1..15dba2e 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -199,12 +199,9 @@ again:
 		XFS_STATS_INC(xs_ig_found);
 
 finish_inode:
-		if (ip->i_d.di_mode == 0) {
-			if (!(flags & XFS_IGET_CREATE)) {
-				xfs_put_perag(mp, pag);
-				return ENOENT;
-			}
-			xfs_iocore_inode_reinit(ip);
+		if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) {
+			xfs_put_perag(mp, pag);
+			return ENOENT;
 		}
 
 		if (lock_flags != 0)
@@ -235,7 +232,6 @@ finish_inode:
 	xfs_itrace_exit_tag(ip, "xfs_iget.alloc");
 
 	xfs_inode_lock_init(ip, vp);
-	xfs_iocore_inode_init(ip);
 	if (lock_flags)
 		xfs_ilock(ip, lock_flags);
 
@@ -331,9 +327,6 @@ finish_inode:
 	ASSERT(ip->i_df.if_ext_max ==
 	       XFS_IFORK_DSIZE(ip) / sizeof(xfs_bmbt_rec_t));
 
-	ASSERT(((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != 0) ==
-	       ((ip->i_iocore.io_flags & XFS_IOCORE_RT) != 0));
-
 	xfs_iflags_set(ip, XFS_IMODIFIED);
 	*ipp = ip;
 
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index e793068..6d5641f 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1220,10 +1220,8 @@ xfs_ialloc(
 					ip->i_d.di_extsize = pip->i_d.di_extsize;
 				}
 			} else if ((mode & S_IFMT) == S_IFREG) {
-				if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT) {
+				if (pip->i_d.di_flags & XFS_DIFLAG_RTINHERIT)
 					di_flags |= XFS_DIFLAG_REALTIME;
-					ip->i_iocore.io_flags |= XFS_IOCORE_RT;
-				}
 				if (pip->i_d.di_flags & XFS_DIFLAG_EXTSZINHERIT) {
 					di_flags |= XFS_DIFLAG_EXTSIZE;
 					ip->i_d.di_extsize = pip->i_d.di_extsize;
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index c3e21ef..88caadd 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -132,45 +132,6 @@ typedef struct dm_attrs_s {
 	__uint16_t	da_pad;		/* DMIG extra padding */
 } dm_attrs_t;
 
-typedef struct xfs_iocore {
-	void			*io_obj;	/* pointer to container
-						 * inode or dcxvn structure */
-	struct xfs_mount	*io_mount;	/* fs mount struct ptr */
-#ifdef DEBUG
-	mrlock_t		*io_lock;	/* inode IO lock */
-	mrlock_t		*io_iolock;	/* inode IO lock */
-#endif
-
-	/* I/O state */
-	xfs_fsize_t		io_new_size;	/* sz when write completes */
-
-	/* Miscellaneous state. */
-	unsigned int		io_flags;	/* IO related flags */
-
-	/* DMAPI state */
-	dm_attrs_t		io_dmattrs;
-
-} xfs_iocore_t;
-
-#define        io_dmevmask     io_dmattrs.da_dmevmask
-#define        io_dmstate      io_dmattrs.da_dmstate
-
-#define XFS_IO_INODE(io)	((xfs_inode_t *) ((io)->io_obj))
-#define XFS_IO_DCXVN(io)	((dcxvn_t *) ((io)->io_obj))
-
-/*
- * Flags in the flags field
- */
-
-#define XFS_IOCORE_RT		0x1
-
-/*
- * xfs_iocore prototypes
- */
-
-extern void xfs_iocore_inode_init(struct xfs_inode *);
-extern void xfs_iocore_inode_reinit(struct xfs_inode *);
-
 /*
  * This is the xfs inode cluster structure.  This structure is used by
  * xfs_iflush to find inodes that share a cluster and can be flushed to disk at
@@ -283,9 +244,6 @@ typedef struct xfs_inode {
 	struct xfs_inode	**i_refcache;	/* ptr to entry in ref cache */
 	struct xfs_inode	*i_release;	/* inode to unref */
 #endif
-	/* I/O state */
-	xfs_iocore_t		i_iocore;	/* I/O core */
-
 	/* Miscellaneous state. */
 	unsigned short		i_flags;	/* see defined flags below */
 	unsigned char		i_update_core;	/* timestamps/size is dirty */
@@ -298,6 +256,7 @@ typedef struct xfs_inode {
 	struct hlist_node	i_cnode;	/* cluster link node */
 
 	xfs_fsize_t		i_size;		/* in-memory size */
+	xfs_fsize_t		i_new_size;	/* size when write completes */
 	atomic_t		i_iocount;	/* outstanding I/O count */
 	/* Trace buffers per inode. */
 #ifdef XFS_INODE_TRACE
diff --git a/fs/xfs/xfs_iocore.c b/fs/xfs/xfs_iocore.c
deleted file mode 100644
index 336e27b..0000000
--- a/fs/xfs/xfs_iocore.c
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * 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.
- *
- * 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.
- *
- * You should have received a copy of the GNU 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
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_types.h"
-#include "xfs_bit.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_ag.h"
-#include "xfs_dir2.h"
-#include "xfs_dfrag.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_inode_item.h"
-#include "xfs_itable.h"
-#include "xfs_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_ialloc.h"
-#include "xfs_bmap.h"
-#include "xfs_error.h"
-#include "xfs_rw.h"
-#include "xfs_quota.h"
-#include "xfs_trans_space.h"
-#include "xfs_iomap.h"
-
-void
-xfs_iocore_inode_reinit(
-	xfs_inode_t	*ip)
-{
-	xfs_iocore_t	*io = &ip->i_iocore;
-
-	io->io_flags = 0;
-	if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME)
-		io->io_flags |= XFS_IOCORE_RT;
-	io->io_dmevmask = ip->i_d.di_dmevmask;
-	io->io_dmstate = ip->i_d.di_dmstate;
-}
-
-void
-xfs_iocore_inode_init(
-	xfs_inode_t	*ip)
-{
-	xfs_iocore_t	*io = &ip->i_iocore;
-	xfs_mount_t	*mp = ip->i_mount;
-
-	io->io_mount = mp;
-#ifdef DEBUG
-	io->io_lock = &ip->i_lock;
-	io->io_iolock = &ip->i_iolock;
-#endif
-
-	io->io_obj = (void *)ip;
-
-	xfs_iocore_inode_reinit(ip);
-}
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 4821b85..d16f40c 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -57,8 +57,6 @@ xfs_iomap_enter_trace(
 	xfs_off_t	offset,
 	ssize_t		count)
 {
-	xfs_iocore_t	*io = &ip->i_iocore;
-
 	if (!ip->i_rwtrace)
 		return;
 
@@ -70,8 +68,8 @@ xfs_iomap_enter_trace(
 		(void *)((unsigned long)((offset >> 32) & 0xffffffff)),
 		(void *)((unsigned long)(offset & 0xffffffff)),
 		(void *)((unsigned long)count),
-		(void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)),
-		(void *)((unsigned long)(io->io_new_size & 0xffffffff)),
+		(void *)((unsigned long)((ip->i_new_size >> 32) & 0xffffffff)),
+		(void *)((unsigned long)(ip->i_new_size & 0xffffffff)),
 		(void *)((unsigned long)current_pid()),
 		(void *)NULL,
 		(void *)NULL,
@@ -186,8 +184,6 @@ xfs_iomap(
 	int		iomap_flags = 0;
 
 	ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
-	ASSERT(((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != 0) ==
-	       ((ip->i_iocore.io_flags & XFS_IOCORE_RT) != 0));
 
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return XFS_ERROR(EIO);
@@ -402,7 +398,6 @@ xfs_iomap_write_direct(
 	int		found)
 {
 	xfs_mount_t	*mp = ip->i_mount;
-	xfs_iocore_t	*io = &ip->i_iocore;
 	xfs_fileoff_t	offset_fsb;
 	xfs_fileoff_t	last_fsb;
 	xfs_filblks_t	count_fsb, resaligned;
@@ -432,8 +427,8 @@ xfs_iomap_write_direct(
 	extsz = xfs_get_extsz_hint(ip);
 
 	isize = ip->i_size;
-	if (io->io_new_size > isize)
-		isize = io->io_new_size;
+	if (ip->i_new_size > isize)
+		isize = ip->i_new_size;
 
 	offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count)));
@@ -528,7 +523,8 @@ xfs_iomap_write_direct(
 		goto error_out;
 	}
 
-	if (unlikely(!imap.br_startblock && !(io->io_flags & XFS_IOCORE_RT))) {
+	if (unlikely(!imap.br_startblock &&
+		     !(ip->i_d.di_flags & XFS_DIFLAG_REALTIME))) {
 		error = xfs_cmn_err_fsblock_zero(ip, &imap);
 		goto error_out;
 	}
@@ -616,7 +612,6 @@ xfs_iomap_write_delay(
 	int		*nmaps)
 {
 	xfs_mount_t	*mp = ip->i_mount;
-	xfs_iocore_t	*io = &ip->i_iocore;
 	xfs_fileoff_t	offset_fsb;
 	xfs_fileoff_t	last_fsb;
 	xfs_off_t	aligned_offset;
@@ -644,8 +639,8 @@ xfs_iomap_write_delay(
 
 retry:
 	isize = ip->i_size;
-	if (io->io_new_size > isize)
-		isize = io->io_new_size;
+	if (ip->i_new_size > isize)
+		isize = ip->i_new_size;
 
 	error = xfs_iomap_eof_want_preallocate(mp, ip, isize, offset, count,
 				ioflag, imap, XFS_WRITE_IMAPS, &prealloc);
@@ -691,7 +686,8 @@ retry:
 		goto retry;
 	}
 
-	if (unlikely(!imap[0].br_startblock && !(io->io_flags & XFS_IOCORE_RT)))
+	if (unlikely(!imap[0].br_startblock &&
+		     !(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)))
 		return xfs_cmn_err_fsblock_zero(ip, &imap[0]);
 
 	*ret_imap = imap[0];
@@ -716,7 +712,6 @@ xfs_iomap_write_allocate(
 	int		*retmap)
 {
 	xfs_mount_t	*mp = ip->i_mount;
-	xfs_iocore_t    *io = &ip->i_iocore;
 	xfs_fileoff_t	offset_fsb, last_block;
 	xfs_fileoff_t	end_fsb, map_start_fsb;
 	xfs_fsblock_t	first_block;
@@ -814,7 +809,7 @@ xfs_iomap_write_allocate(
 		 */
 		for (i = 0; i < nimaps; i++) {
 			if (unlikely(!imap[i].br_startblock &&
-				     !(io->io_flags & XFS_IOCORE_RT)))
+				     !(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)))
 				return xfs_cmn_err_fsblock_zero(ip, &imap[i]);
 			if ((offset_fsb >= imap[i].br_startoff) &&
 			    (offset_fsb < (imap[i].br_startoff +
@@ -850,7 +845,6 @@ xfs_iomap_write_unwritten(
 	size_t		count)
 {
 	xfs_mount_t	*mp = ip->i_mount;
-	xfs_iocore_t    *io = &ip->i_iocore;
 	xfs_fileoff_t	offset_fsb;
 	xfs_filblks_t	count_fsb;
 	xfs_filblks_t	numblks_fsb;
@@ -913,7 +907,7 @@ xfs_iomap_write_unwritten(
 			return XFS_ERROR(error);
 
 		if (unlikely(!imap.br_startblock &&
-			     !(io->io_flags & XFS_IOCORE_RT)))
+			     !(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)))
 			return xfs_cmn_err_fsblock_zero(ip, &imap);
 
 		if ((numblks_fsb = imap.br_blockcount) == 0) {
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 169d993..15025e0 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -56,7 +56,6 @@ struct cred;
 struct log;
 struct xfs_mount_args;
 struct xfs_inode;
-struct xfs_iocore;
 struct xfs_bmbt_irec;
 struct xfs_bmap_free;
 struct xfs_extdelta;
diff --git a/fs/xfs/xfs_rw.h b/fs/xfs/xfs_rw.h
index 49875e1..bcfe07a 100644
--- a/fs/xfs/xfs_rw.h
+++ b/fs/xfs/xfs_rw.h
@@ -36,14 +36,6 @@ xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
 		 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
 		 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
 }
-#define XFS_FSB_TO_DB_IO(io,fsb) xfs_fsb_to_db_io(io,fsb)
-static inline xfs_daddr_t
-xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb)
-{
-	return (((io)->io_flags & XFS_IOCORE_RT) ? \
-		 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
-		 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)));
-}
 
 /*
  * Flags for xfs_free_eofblocks
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 7d3c4a7..d964e21 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -804,12 +804,8 @@ xfs_setattr(
 				if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT)
 					di_flags |= XFS_DIFLAG_EXTSZINHERIT;
 			} else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) {
-				if (vap->va_xflags & XFS_XFLAG_REALTIME) {
+				if (vap->va_xflags & XFS_XFLAG_REALTIME)
 					di_flags |= XFS_DIFLAG_REALTIME;
-					ip->i_iocore.io_flags |= XFS_IOCORE_RT;
-				} else {
-					ip->i_iocore.io_flags &= ~XFS_IOCORE_RT;
-				}
 				if (vap->va_xflags & XFS_XFLAG_EXTSIZE)
 					di_flags |= XFS_DIFLAG_EXTSIZE;
 			}
@@ -3633,8 +3629,8 @@ xfs_set_dmattrs(
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 
-	ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask;
-	ip->i_iocore.io_dmstate  = ip->i_d.di_dmstate  = state;
+	ip->i_d.di_dmevmask = evmask;
+	ip->i_d.di_dmstate  = state;
 
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 	IHOLD(ip);
@@ -4172,7 +4168,7 @@ xfs_free_file_space(
 	ioffset = offset & ~(rounding - 1);
 
 	if (VN_CACHED(vp) != 0) {
-		xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1,
+		xfs_inval_cached_trace(ip, ioffset, -1,
 				ctooff(offtoct(ioffset)), -1);
 		error = xfs_flushinval_pages(ip,
 				ctooff(offtoct(ioffset)),