[PATCH] x86: do not expose CONFIG_BSWAP to userspace

[Harvey Harrison]

Use ifdef __i486__ to ensure the BSWAP instruction is available
on 32-bit x86.

Signed-off-by: Harvey Harrison <harvey.harrison@xxxxxxxxx>
---
HPA,

I'm afraid my knowledge of gcc compiler flags for various models is
lacking, I used i486 as suggested, just wanted to make sure I understood
you corectly.

 arch/x86/include/asm/swab.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/swab.h b/arch/x86/include/asm/swab.h
index 306d417..9af180c 100644
--- a/arch/x86/include/asm/swab.h
+++ b/arch/x86/include/asm/swab.h
@@ -7,7 +7,7 @@
 static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
 {
 #ifdef __i386__
-# ifdef CONFIG_X86_BSWAP
+# ifdef __i486__
 	asm("bswap %0" : "=r" (val) : "0" (val));
 # else
 	asm("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
@@ -37,7 +37,7 @@ static inline __attribute_const__ __u64 __arch_swab64(__u64 val)
 		__u64 u;
 	} v;
 	v.u = val;
-# ifdef CONFIG_X86_BSWAP
+# ifdef __i486__
 	asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
 	    : "=r" (v.s.a), "=r" (v.s.b)
 	    : "0" (v.s.a), "1" (v.s.b));
-- 
1.6.1.401.gf39d5



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