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Date:	Thu, 27 Feb 2014 08:42:38 -0800
From:	"tip-bot for H. Peter Anvin" <>
Subject: [tip:x86/cpufeature] x86, cpufeature: If we disable CLFLUSH,
  we should disable CLFLUSHOPT

Commit-ID:  da4aaa7d860c63a1bfd3c73cf8309afe2840c5b9
Author:     H. Peter Anvin <>
AuthorDate: Thu, 27 Feb 2014 08:36:31 -0800
Committer:  H. Peter Anvin <>
CommitDate: Thu, 27 Feb 2014 08:36:31 -0800

x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT

If we explicitly disable the use of CLFLUSH, we should disable the use
of CLFLUSHOPT as well.

Cc: Ross Zwisler <>
Signed-off-by: H. Peter Anvin <>
 arch/x86/kernel/cpu/common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2c6ac6f..cca53d8 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1026,6 +1026,7 @@ __setup("show_msr=", setup_show_msr);
 static __init int setup_noclflush(char *arg)
+	setup_clear_cpu_cap(X86_FEATURE_CLFLUSHOPT);
 	return 1;
 __setup("noclflush", setup_noclflush);
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