From 6619a8fb594486363783cc4a8372e4d4ee4b913e Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Wed, 17 Oct 2007 18:04:37 +0200
Subject: x86: Create clflush() inline, remove hardcoded wbinvd

Create an inline function for clflush(), with the proper arguments,
and use it instead of hard-coding the instruction.

This also removes one instance of hard-coded wbinvd, based on a patch
by Bauder de Oliveira Costa.

[ tglx: arch/x86 adaptation ]

Cc: Andi Kleen <andi@firstfloor.org>
Cc: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/asm-x86/system_32.h | 4 ++++
 include/asm-x86/system_64.h | 5 +++++
 2 files changed, 9 insertions(+)

(limited to 'include')

diff --git a/include/asm-x86/system_32.h b/include/asm-x86/system_32.h
index 1d6fb3afa53..db6283eb5e4 100644
--- a/include/asm-x86/system_32.h
+++ b/include/asm-x86/system_32.h
@@ -161,6 +161,10 @@ static inline void native_wbinvd(void)
 	asm volatile("wbinvd": : :"memory");
 }
 
+static inline void clflush(volatile void *__p)
+{
+	asm volatile("clflush %0" : "+m" (*(char __force *)__p));
+}
 
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
diff --git a/include/asm-x86/system_64.h b/include/asm-x86/system_64.h
index fb4bcf99e66..ec4c29bcfcb 100644
--- a/include/asm-x86/system_64.h
+++ b/include/asm-x86/system_64.h
@@ -137,6 +137,11 @@ static inline void write_cr8(unsigned long val)
 
 #endif	/* __KERNEL__ */
 
+static inline void clflush(volatile void *__p)
+{
+	asm volatile("clflush %0" : "+m" (*(char __force *)__p));
+}
+
 #define nop() __asm__ __volatile__ ("nop")
 
 #ifdef CONFIG_SMP
-- 
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