linux-kernel - [PATCH] x86: fix typo in filter_cpuid

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Date:	Sat, 14 Feb 2009 23:59:18 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: fix typo in filter_cpuid_features()


Impact: fix wrong diabling cpu features

on amd system got strange:
CPU: CPU feature monitor disabled due to lack of CPUID level 0x5
but in /proc/cpuinfo do have
cpuid level	: 5

on intel system:
CPU: CPU feature monitor disabled due to lack of CPUID level 0x5
CPU: CPU feature dca disabled due to lack of CPUID level 0x9
but in /proc/cpuinfo do have
cpuid level     : 11

it turns out there is one typo, and should use level member in df

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 arch/x86/kernel/cpu/common.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6/arch/x86/kernel/cpu/common.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/cpu/common.c
+++ linux-2.6/arch/x86/kernel/cpu/common.c
@@ -255,9 +255,9 @@ static void __cpuinit filter_cpuid_featu
 		 * signs here...
 		 */
 		if (cpu_has(c, df->feature) &&
-		    ((s32)df->feature < 0 ?
-		     (u32)df->feature > (u32)c->extended_cpuid_level :
-		     (s32)df->feature > (s32)c->cpuid_level)) {
+		    ((s32)df->level < 0 ?
+		     (u32)df->level > (u32)c->extended_cpuid_level :
+		     (s32)df->level > (s32)c->cpuid_level)) {
 			clear_cpu_cap(c, df->feature);
 			if (warn)
 				printk(KERN_WARNING
@@ -267,7 +267,7 @@ static void __cpuinit filter_cpuid_featu
 				       df->level);
 		}
 	}
-}	
+}
 
 /*
  * Naming convention should be: <Name> [(<Codename>)]
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