From 839bea87f0cef852b6a67a959933ab4fd32a6385 Mon Sep 17 00:00:00 2001
From: Kevin Winchester <kjwinchester@gmail.com>
Date: Mon, 10 Aug 2009 19:56:45 -0300
Subject: [PATCH] --- yaml --- r: 156723 b: refs/heads/master c:
 fbd8b1819e80ac5a176d085fdddc3a34d1499318 h: refs/heads/master i:   156721:
 44770754e2bb2ddcffdf40e8b75cac2852f49a69   156719:
 23abbe1cc2582a03dee17d84becd7fc2da6dfcfe v: v3

---
 [refs]                          | 2 +-
 trunk/arch/x86/kernel/cpu/amd.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 20a583ed5a5c..06568ad8deb3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0d01f31439c1e4d602bf9fdc924ab66f407f5e38
+refs/heads/master: fbd8b1819e80ac5a176d085fdddc3a34d1499318
diff --git a/trunk/arch/x86/kernel/cpu/amd.c b/trunk/arch/x86/kernel/cpu/amd.c
index e2485b03f1cf..63fddcd082cd 100644
--- a/trunk/arch/x86/kernel/cpu/amd.c
+++ b/trunk/arch/x86/kernel/cpu/amd.c
@@ -400,6 +400,13 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 		level = cpuid_eax(1);
 		if((level >= 0x0f48 && level < 0x0f50) || level >= 0x0f58)
 			set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+
+		/*
+		 * Some BIOSes incorrectly force this feature, but only K8
+		 * revision D (model = 0x14) and later actually support it.
+		 */
+		if (c->x86_model < 0x14)
+			clear_cpu_cap(c, X86_FEATURE_LAHF_LM);
 	}
 	if (c->x86 == 0x10 || c->x86 == 0x11)
 		set_cpu_cap(c, X86_FEATURE_REP_GOOD);