26 lines
848 B
Diff
26 lines
848 B
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Arjan van de Ven <arjan@linux.intel.com>
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Date: Sat, 8 Dec 2018 18:21:32 +0000
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Subject: [PATCH] use lfence instead of rep and nop
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---
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arch/x86/include/asm/processor.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
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index 54f5d54280f6..ee60a1f2dd11 100644
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--- a/arch/x86/include/asm/processor.h
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+++ b/arch/x86/include/asm/processor.h
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@@ -647,7 +647,7 @@ static inline unsigned int cpuid_edx(unsigned int op)
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static __always_inline void rep_nop(void)
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{
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- asm volatile("rep; nop" ::: "memory");
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+ asm volatile("lfence" ::: "memory");
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}
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static __always_inline void cpu_relax(void)
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--
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https://clearlinux.org
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