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x86: Create clflush() inline, remove hardcoded wbinvd

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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 <[email protected]>
Cc: Glauber de Oliveira Costa <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
H. Peter Anvin 2007-10-17 18:04:37 +02:00 • committed by Thomas Gleixner
commit 6619a8fb59
6 changed files with 20 additions and 10 deletions
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4
include/asm-x86/system_32.h
View file

@ -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>

5
include/asm-x86/system_64.h
View file

@ -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