[XFS] Remove CFORK macros and use code directly in IFORK and DFORK macros.

Currently XFS_IFORK_* and XFS_DFORK* are implemented by means of
XFS_CFORK* macros. But given that XFS_IFORK_* operates on an xfs_inode
that embedds and xfs_icdinode_core and XFS_DFORK_* operates on an
xfs_dinode that embedds a xfs_dinode_core one will have to do endian
swapping while the other doesn't. Instead of having the current mess with
the CFORK macros that have byteswapping and non-byteswapping version
(which are inconsistantly named while we're at it) just define each family
of the macros to stand by itself and simplify the whole matter.

A few direct references to the CFORK variants were cleaned up to use IFORK
or DFORK to make this possible.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30163a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index a451baa..658aab6 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -170,7 +170,7 @@
 	buf->bs_mtime.tv_nsec = be32_to_cpu(dic->di_mtime.t_nsec);
 	buf->bs_ctime.tv_sec = be32_to_cpu(dic->di_ctime.t_sec);
 	buf->bs_ctime.tv_nsec = be32_to_cpu(dic->di_ctime.t_nsec);
-	buf->bs_xflags = xfs_dic2xflags(dic);
+	buf->bs_xflags = xfs_dic2xflags(dip);
 	buf->bs_extsize = be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog;
 	buf->bs_extents = be32_to_cpu(dic->di_nextents);
 	buf->bs_gen = be32_to_cpu(dic->di_gen);
@@ -307,7 +307,7 @@
 	}
 	/* BULKSTAT_FG_INLINE: if attr fork is local, or not there, use it */
 	aformat = dip->di_core.di_aformat;
-	if ((XFS_CFORK_Q(&dip->di_core) == 0) ||
+	if ((XFS_DFORK_Q(dip) == 0) ||
 	    (aformat == XFS_DINODE_FMT_LOCAL) ||
 	    (aformat == XFS_DINODE_FMT_EXTENTS && !dip->di_core.di_anextents)) {
 		*dipp = dip;