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endian: #define __BYTE_ORDER

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Linux does not define __BYTE_ORDER in its endian header files which makes
some header files bend backwards to get at the current endian.  Lets
#define __BYTE_ORDER in big_endian.h/litte_endian.h to make it easier for
header files that are used in user space too.

In userspace the convention is that

  1. _both_ __LITTLE_ENDIAN and __BIG_ENDIAN are defined,
  2. you have to test for e.g. __BYTE_ORDER == __BIG_ENDIAN.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joakim Tjernlund 2010-05-24 14:33:01 -07:00 committed by Linus Torvalds
parent e47103b1af
commit b3b77c8cae
9 changed files with 8 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/alpha/math-emu/sfp-util.h
View File

@ -28,8 +28,3 @@ extern unsigned long __udiv_qrnnd (unsigned long *, unsigned long,
#define UDIV_NEEDS_NORMALIZATION 1
#define abort() goto bad_insn
#ifndef __LITTLE_ENDIAN
#define __LITTLE_ENDIAN -1
#endif
#define __BYTE_ORDER __LITTLE_ENDIAN

6
arch/powerpc/include/asm/sfp-machine.h
View File

@ -353,12 +353,6 @@
#define abort() \
return 0
#ifdef __BIG_ENDIAN
#define __BYTE_ORDER __BIG_ENDIAN
#else
#define __BYTE_ORDER __LITTLE_ENDIAN
#endif
/* Exception flags. */
#define EFLAG_INVALID (1 << (31 - 2))
#define EFLAG_OVERFLOW (1 << (31 - 3))

2
arch/s390/include/asm/sfp-util.h
View File

@ -73,5 +73,3 @@ extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int,
#define UDIV_NEEDS_NORMALIZATION 0
#define abort() return 0
#define __BYTE_ORDER __BIG_ENDIAN

4
arch/sh/math-emu/sfp-util.h
View File

@ -66,7 +66,3 @@
} while (0)
#define abort() return 0
#define __BYTE_ORDER __LITTLE_ENDIAN

6
arch/sparc/math-emu/sfp-util_32.h
View File

@ -107,9 +107,3 @@
#define abort() \
return 0
#ifdef __BIG_ENDIAN
#define __BYTE_ORDER __BIG_ENDIAN
#else
#define __BYTE_ORDER __LITTLE_ENDIAN
#endif

6
arch/sparc/math-emu/sfp-util_64.h
View File

@ -112,9 +112,3 @@
#define abort() \
return 0
#ifdef __BIG_ENDIAN
#define __BYTE_ORDER __BIG_ENDIAN
#else
#define __BYTE_ORDER __LITTLE_ENDIAN
#endif

4
arch/x86/boot/compressed/relocs.c
View File

@ -195,11 +195,11 @@ static const char *sym_name(const char *sym_strtab, Elf32_Sym *sym)
#if BYTE_ORDER == LITTLE_ENDIAN
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define le16_to_cpu(val) (val)
#define le32_to_cpu(val) (val)
#endif
#if BYTE_ORDER == BIG_ENDIAN
#if __BYTE_ORDER == __BIG_ENDIAN
#define le16_to_cpu(val) bswap_16(val)
#define le32_to_cpu(val) bswap_32(val)
#endif

3
include/linux/byteorder/big_endian.h
View File

@ -7,6 +7,9 @@
#ifndef __BIG_ENDIAN_BITFIELD
#define __BIG_ENDIAN_BITFIELD
#endif
#ifndef __BYTE_ORDER
#define __BYTE_ORDER __BIG_ENDIAN
#endif
#include <linux/types.h>
#include <linux/swab.h>

3
include/linux/byteorder/little_endian.h
View File

@ -7,6 +7,9 @@
#ifndef __LITTLE_ENDIAN_BITFIELD
#define __LITTLE_ENDIAN_BITFIELD
#endif
#ifndef __BYTE_ORDER
#define __BYTE_ORDER __LITTLE_ENDIAN
#endif
#include <linux/types.h>
#include <linux/swab.h>