This is a note to let you know that I've just added the patch titled
x86, cpufeature: Fix cpuid leaf 7 feature detection
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-cpufeature-fix-cpuid-leaf-7-feature-detection.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 2494b030ba9334c7dd7df9b9f7abe4eacc950ec5 Mon Sep 17 00:00:00 2001
From: Fenghua Yu <[email protected]>
Date: Tue, 17 May 2011 12:33:26 -0700
Subject: x86, cpufeature: Fix cpuid leaf 7 feature detection
From: Fenghua Yu <[email protected]>
commit 2494b030ba9334c7dd7df9b9f7abe4eacc950ec5 upstream.
CPUID leaf 7, subleaf 0 returns the maximum subleaf in EAX, not the
number of subleaves. Since so far only subleaf 0 is defined (and only
the EBX bitfield) we do not need to qualify the test.
Signed-off-by: Fenghua Yu <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/kernel/cpu/common.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -565,8 +565,7 @@ void __cpuinit get_cpu_cap(struct cpuinf
cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
- if (eax > 0)
- c->x86_capability[9] = ebx;
+ c->x86_capability[9] = ebx;
}
/* AMD-defined flags: level 0x80000001 */
Patches currently in stable-queue which might be from [email protected] are
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