linux-kernel - [tip:x86/cpufeature] x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT

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Message-ID: <tip-jtdv7btppr4jgzxm3sxx1e74@git.kernel.org>
Date:	Thu, 27 Feb 2014 08:42:38 -0800
From:	"tip-bot for H. Peter Anvin" <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	ross.zwisler@...ux.intel.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Subject: [tip:x86/cpufeature] x86, cpufeature: If we disable CLFLUSH,
  we should disable CLFLUSHOPT

Commit-ID:  da4aaa7d860c63a1bfd3c73cf8309afe2840c5b9
Gitweb:     http://git.kernel.org/tip/da4aaa7d860c63a1bfd3c73cf8309afe2840c5b9
Author:     H. Peter Anvin <hpa@...ux.intel.com>
AuthorDate: Thu, 27 Feb 2014 08:36:31 -0800
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
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 <ross.zwisler@...ux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
Link: http://lkml.kernel.org/n/tip-jtdv7btppr4jgzxm3sxx1e74@git.kernel.org
---
 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_CLFLUSH);
+	setup_clear_cpu_cap(X86_FEATURE_CLFLUSHOPT);
 	return 1;
 }
 __setup("noclflush", setup_noclflush);
--
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