x86: introduce asm/swab.h

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 64 insertions, 60 deletions

diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index 4a8e80cdcfa5..a9f8a814a1f7 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -22,3 +22,4 @@ unifdef-y += unistd_32.h
 unifdef-y += unistd_64.h
 unifdef-y += vm86.h
 unifdef-y += vsyscall.h
+unifdef-y += swab.h
diff --git a/arch/x86/include/asm/byteorder.h b/arch/x86/include/asm/byteorder.h
index f110ad417df3..7c49917e3d9d 100644
--- a/arch/x86/include/asm/byteorder.h
+++ b/arch/x86/include/asm/byteorder.h
@@ -1,65 +1,7 @@
 #ifndef _ASM_X86_BYTEORDER_H
 #define _ASM_X86_BYTEORDER_H
 
-#include <asm/types.h>
-#include <linux/compiler.h>
-
-#define __LITTLE_ENDIAN
-
-static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
-{
-#ifdef __i386__
-# ifdef CONFIG_X86_BSWAP
-        asm("bswap %0" : "=r" (val) : "0" (val));
-# else
-        asm("xchgb %b0,%h0\n\t" /* swap lower bytes     */
-            "rorl $16,%0\n\t"   /* swap words           */
-            "xchgb %b0,%h0"     /* swap higher bytes    */
-            : "=q" (val)
-            : "0" (val));
-# endif
-
-#else /* __i386__ */
-        asm("bswapl %0"
-            : "=r" (val)
-            : "0" (val));
-#endif
-        return val;
-}
-#define __arch_swab32 __arch_swab32
-
-static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
-{
-#ifdef __i386__
-        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__ */
-        asm("bswapq %0"
-            : "=r" (val)
-            : "0" (val));
-        return val;
-#endif
-}
-#define __arch_swab64 __arch_swab64
-
-#include <linux/byteorder.h>
+#include <asm/swab.h>
+#include <linux/byteorder/little_endian.h>
 
 #endif /* _ASM_X86_BYTEORDER_H */
diff --git a/arch/x86/include/asm/swab.h b/arch/x86/include/asm/swab.h
new file mode 100644
index 000000000000..306d4178ffc9
--- /dev/null
+++ b/arch/x86/include/asm/swab.h
@@ -0,0 +1,61 @@
+#ifndef _ASM_X86_SWAB_H
+#define _ASM_X86_SWAB_H
+
+#include <asm/types.h>
+#include <linux/compiler.h>
+
+static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
+{
+#ifdef __i386__
+# ifdef CONFIG_X86_BSWAP
+        asm("bswap %0" : "=r" (val) : "0" (val));
+# else
+        asm("xchgb %b0,%h0\n\t" /* swap lower bytes     */
+            "rorl $16,%0\n\t"   /* swap words           */
+            "xchgb %b0,%h0"     /* swap higher bytes    */
+            : "=q" (val)
+            : "0" (val));
+# endif
+
+#else /* __i386__ */
+        asm("bswapl %0"
+            : "=r" (val)
+            : "0" (val));
+#endif
+        return val;
+}
+#define __arch_swab32 __arch_swab32
+
+static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
+{
+#ifdef __i386__
+        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__ */
+        asm("bswapq %0"
+            : "=r" (val)
+            : "0" (val));
+        return val;
+#endif
+}
+#define __arch_swab64 __arch_swab64
+
+#endif /* _ASM_X86_SWAB_H */