GFS2: Move i_size from gfs2_dinode_host and rename it to i_disksize

This patch moved the i_size field from the gfs2_dinode_host and
following the ext3 convention renames it i_disksize.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 91735b8..baf8b24 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -273,8 +273,8 @@
 	 * to do that.
 	 */
 	ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
-	di->di_size = be64_to_cpu(str->di_size);
-	i_size_write(&ip->i_inode, di->di_size);
+	ip->i_disksize = be64_to_cpu(str->di_size);
+	i_size_write(&ip->i_inode, ip->i_disksize);
 	gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 	atime.tv_sec = be64_to_cpu(str->di_atime);
 	atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
@@ -1167,7 +1167,7 @@
 		return error;
 	}
 
-	if (!ip->i_di.di_size) {
+	if (!ip->i_disksize) {
 		gfs2_consist_inode(ip);
 		error = -EIO;
 		goto out;
@@ -1177,7 +1177,7 @@
 	if (error)
 		goto out;
 
-	x = ip->i_di.di_size + 1;
+	x = ip->i_disksize + 1;
 	if (x > *len) {
 		*buf = kmalloc(x, GFP_NOFS);
 		if (!*buf) {
@@ -1255,7 +1255,7 @@
 	str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
 	str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
 	str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
-	str->di_size = cpu_to_be64(di->di_size);
+	str->di_size = cpu_to_be64(ip->i_disksize);
 	str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
 	str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
 	str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
@@ -1287,7 +1287,8 @@
 	       (unsigned long long)ip->i_no_formal_ino);
 	printk(KERN_INFO "  no_addr = %llu\n",
 	       (unsigned long long)ip->i_no_addr);
-	printk(KERN_INFO "  di_size = %llu\n", (unsigned long long)di->di_size);
+	printk(KERN_INFO "  i_disksize = %llu\n",
+	       (unsigned long long)ip->i_disksize);
 	printk(KERN_INFO "  blocks = %llu\n",
 	       (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
 	printk(KERN_INFO "  i_goal = %llu\n",