mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
![Andrew Morton](/assets/img/avatar_default.png)
In file included from drivers/media/dvb/ttpci/av7110_hw.c:38: include/linux/byteorder/swabb.h:96: warning: type qualifiers ignored on function return type include/linux/byteorder/swabb.h:110: warning: type qualifiers ignored on function return type In file included from drivers/media/dvb/ttpci/av7110_v4l.c:36: include/linux/byteorder/swabb.h:96: warning: type qualifiers ignored on function return type include/linux/byteorder/swabb.h:110: warning: type qualifiers ignored on function return type In file included from drivers/media/dvb/ttpci/av7110_av.c:37: include/linux/byteorder/swabb.h:96: warning: type qualifiers ignored on function return type include/linux/byteorder/swabb.h:110: warning: type qualifiers ignored on function return type drivers/isdn/icn/icn.c:719:4: warning: #warning TODO test headroom or use skb->nb to flag ACK In file included from drivers/media/dvb/ttpci/av7110_ca.c:39: include/linux/byteorder/swabb.h:96: warning: type qualifiers ignored on function return type include/linux/byteorder/swabb.h:110: warning: type qualifiers ignored on function return type In file included from drivers/media/dvb/ttpci/av7110.c:41: include/linux/byteorder/swabb.h:96: warning: type qualifiers ignored on function return type include/linux/byteorder/swabb.h:110: warning: type qualifiers ignored on function return type Does declaring a function to return a const value actually mean something to gcc? Dunno. Kill it and replace sone `__inline__'s with `inline' too. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
#ifndef _LINUX_BYTEORDER_SWABB_H
|
|
#define _LINUX_BYTEORDER_SWABB_H
|
|
|
|
/*
|
|
* linux/byteorder/swabb.h
|
|
* SWAp Bytes Bizarrely
|
|
* swaHHXX[ps]?(foo)
|
|
*
|
|
* Support for obNUXIous pdp-endian and other bizarre architectures.
|
|
* Will Linux ever run on such ancient beasts? if not, this file
|
|
* will be but a programming pearl. Still, it's a reminder that we
|
|
* shouldn't be making too many assumptions when trying to be portable.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Meaning of the names I chose (vaxlinux people feel free to correct them):
|
|
* swahw32 swap 16-bit half-words in a 32-bit word
|
|
* swahb32 swap 8-bit halves of each 16-bit half-word in a 32-bit word
|
|
*
|
|
* No 64-bit support yet. I don't know NUXI conventions for long longs.
|
|
* I guarantee it will be a mess when it's there, though :->
|
|
* It will be even worse if there are conflicting 64-bit conventions.
|
|
* Hopefully, no one ever used 64-bit objects on NUXI machines.
|
|
*
|
|
*/
|
|
|
|
#define ___swahw32(x) \
|
|
({ \
|
|
__u32 __x = (x); \
|
|
((__u32)( \
|
|
(((__u32)(__x) & (__u32)0x0000ffffUL) << 16) | \
|
|
(((__u32)(__x) & (__u32)0xffff0000UL) >> 16) )); \
|
|
})
|
|
#define ___swahb32(x) \
|
|
({ \
|
|
__u32 __x = (x); \
|
|
((__u32)( \
|
|
(((__u32)(__x) & (__u32)0x00ff00ffUL) << 8) | \
|
|
(((__u32)(__x) & (__u32)0xff00ff00UL) >> 8) )); \
|
|
})
|
|
|
|
#define ___constant_swahw32(x) \
|
|
((__u32)( \
|
|
(((__u32)(x) & (__u32)0x0000ffffUL) << 16) | \
|
|
(((__u32)(x) & (__u32)0xffff0000UL) >> 16) ))
|
|
#define ___constant_swahb32(x) \
|
|
((__u32)( \
|
|
(((__u32)(x) & (__u32)0x00ff00ffUL) << 8) | \
|
|
(((__u32)(x) & (__u32)0xff00ff00UL) >> 8) ))
|
|
|
|
/*
|
|
* provide defaults when no architecture-specific optimization is detected
|
|
*/
|
|
#ifndef __arch__swahw32
|
|
# define __arch__swahw32(x) ___swahw32(x)
|
|
#endif
|
|
#ifndef __arch__swahb32
|
|
# define __arch__swahb32(x) ___swahb32(x)
|
|
#endif
|
|
|
|
#ifndef __arch__swahw32p
|
|
# define __arch__swahw32p(x) __swahw32(*(x))
|
|
#endif
|
|
#ifndef __arch__swahb32p
|
|
# define __arch__swahb32p(x) __swahb32(*(x))
|
|
#endif
|
|
|
|
#ifndef __arch__swahw32s
|
|
# define __arch__swahw32s(x) do { *(x) = __swahw32p((x)); } while (0)
|
|
#endif
|
|
#ifndef __arch__swahb32s
|
|
# define __arch__swahb32s(x) do { *(x) = __swahb32p((x)); } while (0)
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Allow constant folding
|
|
*/
|
|
#if defined(__GNUC__) && (__GNUC__ >= 2) && defined(__OPTIMIZE__)
|
|
# define __swahw32(x) \
|
|
(__builtin_constant_p((__u32)(x)) ? \
|
|
___swahw32((x)) : \
|
|
__fswahw32((x)))
|
|
# define __swahb32(x) \
|
|
(__builtin_constant_p((__u32)(x)) ? \
|
|
___swahb32((x)) : \
|
|
__fswahb32((x)))
|
|
#else
|
|
# define __swahw32(x) __fswahw32(x)
|
|
# define __swahb32(x) __fswahb32(x)
|
|
#endif /* OPTIMIZE */
|
|
|
|
|
|
static inline __u32 __fswahw32(__u32 x)
|
|
{
|
|
return __arch__swahw32(x);
|
|
}
|
|
|
|
static inline __u32 __swahw32p(__u32 *x)
|
|
{
|
|
return __arch__swahw32p(x);
|
|
}
|
|
|
|
static inline void __swahw32s(__u32 *addr)
|
|
{
|
|
__arch__swahw32s(addr);
|
|
}
|
|
|
|
static inline __u32 __fswahb32(__u32 x)
|
|
{
|
|
return __arch__swahb32(x);
|
|
}
|
|
|
|
static inline __u32 __swahb32p(__u32 *x)
|
|
{
|
|
return __arch__swahb32p(x);
|
|
}
|
|
|
|
static inline void __swahb32s(__u32 *addr)
|
|
{
|
|
__arch__swahb32s(addr);
|
|
}
|
|
|
|
#ifdef __BYTEORDER_HAS_U64__
|
|
/*
|
|
* Not supported yet
|
|
*/
|
|
#endif /* __BYTEORDER_HAS_U64__ */
|
|
|
|
#if defined(__KERNEL__)
|
|
#define swahw32 __swahw32
|
|
#define swahb32 __swahb32
|
|
#define swahw32p __swahw32p
|
|
#define swahb32p __swahb32p
|
|
#define swahw32s __swahw32s
|
|
#define swahb32s __swahb32s
|
|
#endif
|
|
|
|
#endif /* _LINUX_BYTEORDER_SWABB_H */
|