x86, 386 removal: Remove CONFIG_BSWAP

All 486+ CPUs support BSWAP, so remove the fallback 386 support
code.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1354132230-21854-5-git-send-email-hpa@linux.intel.com

1 files changed, 2 insertions, 27 deletions

diff --git a/arch/x86/include/asm/swab.h b/arch/x86/include/asm/swab.h
index 557cd9f00661..7f235c7105c1 100644
--- a/arch/x86/include/asm/swab.h
+++ b/arch/x86/include/asm/swab.h
@@ -6,22 +6,7 @@
 
 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
+	asm("bswapl %0" : "=r" (val) : "0" (val));
 	return val;
 }
 #define __arch_swab32 __arch_swab32
@@ -37,22 +22,12 @@ static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
 		__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));
+	asm("bswapq %0" : "=r" (val) : "0" (val));
 	return val;
 #endif
 }