[XFS] Cleanup some -Wundef flag warnings in the endian macros (thanks

Christoph).

SGI-PV: 942400
SGI-Modid: xfs-linux-melb:xfs-kern:23771a

Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/xfs_arch.h

@@ -40,22 +40,28 @@
 
 #include <asm/byteorder.h>
 
-#ifdef __LITTLE_ENDIAN
-# define __BYTE_ORDER	__LITTLE_ENDIAN
-#endif
 #ifdef __BIG_ENDIAN
-# define __BYTE_ORDER	__BIG_ENDIAN
+#define	XFS_NATIVE_HOST	1
+#else
+#undef XFS_NATIVE_HOST
+#endif
+
+#else /* __KERNEL__ */
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define	XFS_NATIVE_HOST	1
+#else
+#undef XFS_NATIVE_HOST
 #endif
 
 #endif	/* __KERNEL__ */
 
 /* do we need conversion? */
-
 #define ARCH_NOCONVERT 1
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-# define ARCH_CONVERT	0
-#else
+#ifdef XFS_NATIVE_HOST
 # define ARCH_CONVERT	ARCH_NOCONVERT
+#else
+# define ARCH_CONVERT	0
 #endif
 
 /* generic swapping macros */

fs/xfs/xfs_bmap_btree.c

@@ -2017,7 +2017,7 @@ xfs_bmbt_get_state(
 				ext_flag);
 }
 
-#if __BYTE_ORDER != __BIG_ENDIAN
+#ifndef XFS_NATIVE_HOST
 /* Endian flipping versions of the bmbt extraction functions */
 void
 xfs_bmbt_disk_get_all(
@@ -2087,7 +2087,7 @@ xfs_bmbt_disk_get_state(
 	return xfs_extent_state(xfs_bmbt_disk_get_blockcount(r),
 				ext_flag);
 }
-#endif
+#endif /* XFS_NATIVE_HOST */
 
 
 /*
@@ -2531,7 +2531,7 @@ xfs_bmbt_set_allf(
 #endif	/* XFS_BIG_BLKNOS */
 }
 
-#if __BYTE_ORDER != __BIG_ENDIAN
+#ifndef XFS_NATIVE_HOST
 /*
  * Set all the fields in a bmap extent record from the uncompressed form.
  */
@@ -2617,7 +2617,7 @@ xfs_bmbt_disk_set_allf(
 	}
 #endif	/* XFS_BIG_BLKNOS */
 }
-#endif
+#endif /* XFS_NATIVE_HOST */
 
 /*
  * Set the blockcount field in a bmap extent record.

fs/xfs/xfs_bmap_btree.h

@@ -62,7 +62,7 @@ typedef struct xfs_bmdr_block
  *  l1:0-20 are blockcount.
  */
 
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#ifndef XFS_NATIVE_HOST
 
 #define BMBT_TOTAL_BITLEN	128	/* 128 bits, 16 bytes */
 #define BMBT_EXNTFLAG_BITOFF	0
@@ -87,7 +87,7 @@ typedef struct xfs_bmdr_block
 #define BMBT_BLOCKCOUNT_BITOFF	64 /* Start of second 64 bit container */
 #define BMBT_BLOCKCOUNT_BITLEN	21
 
-#endif
+#endif /* XFS_NATIVE_HOST */
 
 
 #define BMBT_USE_64	1
@@ -505,7 +505,7 @@ xfs_exntst_t
 xfs_bmbt_get_state(
 	xfs_bmbt_rec_t	*r);
 
-#if __BYTE_ORDER != __BIG_ENDIAN
+#ifndef XFS_NATIVE_HOST
 void
 xfs_bmbt_disk_get_all(
 	xfs_bmbt_rec_t	*r,
@@ -538,7 +538,7 @@ xfs_bmbt_disk_get_startoff(
 	xfs_bmbt_get_blockcount(r)
 #define xfs_bmbt_disk_get_startoff(r) \
 	xfs_bmbt_get_startoff(r)
-#endif
+#endif /* XFS_NATIVE_HOST */
 
 int
 xfs_bmbt_increment(
@@ -623,7 +623,7 @@ xfs_bmbt_set_state(
 	xfs_bmbt_rec_t	*r,
 	xfs_exntst_t	v);
 
-#if __BYTE_ORDER != __BIG_ENDIAN
+#ifndef XFS_NATIVE_HOST
 void
 xfs_bmbt_disk_set_all(
 	xfs_bmbt_rec_t	*r,
@@ -641,7 +641,7 @@ xfs_bmbt_disk_set_allf(
 	xfs_bmbt_set_all(r, s)
 #define xfs_bmbt_disk_set_allf(r, o, b, c, v) \
 	xfs_bmbt_set_allf(r, o, b, c, v)
-#endif
+#endif /* XFS_NATIVE_HOST */
 
 void
 xfs_bmbt_to_bmdr(

fs/xfs/xfs_dir_leaf.h

@@ -127,13 +127,13 @@ typedef union {
 	 * Watch the order here (endian-ness dependent).
 	 */
 	struct {
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#ifndef XFS_NATIVE_HOST
 		xfs_dahash_t	h;	/* hash value */
 		__uint32_t	be;	/* block and entry */
-#else	/* __BYTE_ORDER == __BIG_ENDIAN */
+#else
 		__uint32_t	be;	/* block and entry */
 		xfs_dahash_t	h;	/* hash value */
-#endif	/* __BYTE_ORDER == __BIG_ENDIAN */
+#endif /* XFS_NATIVE_HOST */
 	} s;
 } xfs_dircook_t;
 

fs/xfs/xfs_inode_item.c

@@ -341,7 +341,7 @@ xfs_inode_item_format(
 			nrecs = ip->i_df.if_bytes /
 				(uint)sizeof(xfs_bmbt_rec_t);
 			ASSERT(nrecs > 0);
-#if __BYTE_ORDER == __BIG_ENDIAN
+#ifdef XFS_NATIVE_HOST
 			if (nrecs == ip->i_d.di_nextents) {
 				/*
 				 * There are no delayed allocation
@@ -473,7 +473,7 @@ xfs_inode_item_format(
 #endif
 			ASSERT(nrecs > 0);
 			ASSERT(nrecs == ip->i_d.di_anextents);
-#if __BYTE_ORDER == __BIG_ENDIAN
+#ifdef XFS_NATIVE_HOST
 			/*
 			 * There are not delayed allocation extents
 			 * for attributes, so just point at the array.

fs/xfs/xfs_log_priv.h

@@ -112,7 +112,7 @@ struct xfs_mount;
  * this has endian issues, of course.
  */
 
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#ifndef XFS_NATIVE_HOST
 #define GET_CLIENT_ID(i,arch) \
     ((i) & 0xff)
 #else
@@ -414,14 +414,10 @@ typedef struct xlog_op_header {
 #define XLOG_FMT_IRIX_BE  3
 
 /* our fmt */
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define XLOG_FMT XLOG_FMT_LINUX_LE
-#else
-#if __BYTE_ORDER == __BIG_ENDIAN
+#ifdef XFS_NATIVE_HOST
 #define XLOG_FMT XLOG_FMT_LINUX_BE
 #else
-#error unknown byte order
-#endif
+#define XLOG_FMT XLOG_FMT_LINUX_LE
 #endif
 
 typedef struct xlog_rec_header {