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byteorder: use generic C version for value byteswapping

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This makes the new implementation of the byteorder helpers match the old
in how it degraded when an arch-defined version was not available:

1) swab()
	- look for arch defined
	- if not, use generic c version

2) swabp()
	- look for arch-defined
	- if not, deref pointer and use swab()

3) swabs()
	- look for arch defined
	- if not, use swabp

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Harvey Harrison 2008-10-18 20:28:36 -07:00 committed by Linus Torvalds
parent b8e465f494
commit acf0108a84
1 changed files with 0 additions and 10 deletions
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10
include/linux/swab.h
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@ -47,8 +47,6 @@ static inline __attribute_const__ __u16 ___swab16(__u16 val)
{
#ifdef __arch_swab16
return __arch_swab16(val);
#elif defined(__arch_swab16p)
return __arch_swab16p(&val);
#else
return __const_swab16(val);
#endif
@ -58,8 +56,6 @@ static inline __attribute_const__ __u32 ___swab32(__u32 val)
{
#ifdef __arch_swab32
return __arch_swab32(val);
#elif defined(__arch_swab32p)
return __arch_swab32p(&val);
#else
return __const_swab32(val);
#endif
@ -69,8 +65,6 @@ static inline __attribute_const__ __u64 ___swab64(__u64 val)
{
#ifdef __arch_swab64
return __arch_swab64(val);
#elif defined(__arch_swab64p)
return __arch_swab64p(&val);
#elif defined(__SWAB_64_THRU_32__)
__u32 h = val >> 32;
__u32 l = val & ((1ULL << 32) - 1);
@ -84,8 +78,6 @@ static inline __attribute_const__ __u32 ___swahw32(__u32 val)
{
#ifdef __arch_swahw32
return __arch_swahw32(val);
#elif defined(__arch_swahw32p)
return __arch_swahw32p(&val);
#else
return __const_swahw32(val);
#endif
@ -95,8 +87,6 @@ static inline __attribute_const__ __u32 ___swahb32(__u32 val)
{
#ifdef __arch_swahb32
return __arch_swahb32(val);
#elif defined(__arch_swahb32p)
return __arch_swahb32p(&val);
#else
return __const_swahb32(val);
#endif