[U-Boot-Users] [PATCH 00/17] x86: Fix warning: type qualifiers ignored on function return type

[Jean-Christophe PLAGNIOL-VILLARD]

by sync asm/byteorder.h with linux

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
 include/asm-i386/byteorder.h |  125 +++++++++++++++++++++++++++--------------
 1 files changed, 82 insertions(+), 43 deletions(-)
 rewrite include/asm-i386/byteorder.h (65%)

diff --git a/include/asm-i386/byteorder.h b/include/asm-i386/byteorder.h
dissimilarity index 65%
index a9c69d5..545ff75 100644
--- a/include/asm-i386/byteorder.h
+++ b/include/asm-i386/byteorder.h
@@ -1,43 +1,82 @@
-#ifndef _I386_BYTEORDER_H
-#define _I386_BYTEORDER_H
-
-#include <asm/types.h>
-
-#ifdef __GNUC__
-
-
-static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
-{
-#ifdef CONFIG_X86_BSWAP
-	__asm__("bswap %0" : "=r" (x) : "0" (x));
-#else
-	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
-		"rorl $16,%0\n\t"	/* swap words		*/
-		"xchgb %b0,%h0"		/* swap higher bytes	*/
-		:"=q" (x)
-		: "0" (x));
-#endif
-	return x;
-}
-
-static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
-{
-	__asm__("xchgb %b0,%h0"		/* swap bytes		*/ \
-		: "=q" (x) \
-		:  "0" (x)); \
-		return x;
-}
-
-#define __arch__swab32(x) ___arch__swab32(x)
-#define __arch__swab16(x) ___arch__swab16(x)
-
-#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
-#  define __BYTEORDER_HAS_U64__
-#  define __SWAB_64_THRU_32__
-#endif
-
-#endif /* __GNUC__ */
-
-#include <linux/byteorder/little_endian.h>
-
-#endif /* _I386_BYTEORDER_H */
+#ifndef _I386_BYTEORDER_H
+#define _I386_BYTEORDER_H
+
+#include <asm/types.h>
+
+#ifdef __GNUC__
+
+#define __attribute_const__ __attribute__((__const__))
+
+#ifdef __i386__
+
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
+{
+#ifdef CONFIG_X86_BSWAP
+	asm("bswap %0" : "=r" (x) : "0" (x));
+#else
+	asm("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
+	    "rorl $16,%0\n\t"	/* swap words		*/
+	    "xchgb %b0,%h0"	/* swap higher bytes	*/
+	    : "=q" (x)
+	    : "0" (x));
+#endif
+	return x;
+}
+
+static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 val)
+{
+	union {
+		struct {
+			__u32 a;
+			__u32 b;
+		} s;
+		__u64 u;
+	} v;
+	v.u = val;
+#ifdef CONFIG_X86_BSWAP
+	asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+	    : "=r" (v.s.a), "=r" (v.s.b)
+	    : "0" (v.s.a), "1" (v.s.b));
+#else
+	v.s.a = ___arch__swab32(v.s.a);
+	v.s.b = ___arch__swab32(v.s.b);
+	asm("xchgl %0,%1"
+	    : "=r" (v.s.a), "=r" (v.s.b)
+	    : "0" (v.s.a), "1" (v.s.b));
+#endif
+	return v.u;
+}
+
+#else /* __i386__ */
+
+static inline __attribute_const__ __u64 ___arch__swab64(__u64 x)
+{
+	asm("bswapq %0"
+	    : "=r" (x)
+	    : "0" (x));
+	return x;
+}
+
+static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
+{
+	asm("bswapl %0"
+	    : "=r" (x)
+	    : "0" (x));
+	return x;
+}
+
+#endif
+
+/* Do not define swab16.  Gcc is smart enough to recognize "C" version and
+   convert it into rotation or exhange.  */
+
+#define __arch__swab64(x) ___arch__swab64(x)
+#define __arch__swab32(x) ___arch__swab32(x)
+
+#define __BYTEORDER_HAS_U64__
+
+#endif /* __GNUC__ */
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _I386_BYTEORDER_H */
-- 
1.5.5.1