linux-kernel - [PATCH 1/2] AMD,x86: Clean up init

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Date:	Tue, 29 Jan 2013 16:32:16 -0500
From:	Boris Ostrovsky <ostr@...64.org>
To:	<tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>
CC:	<Jacob.Shin@....com>, <bp@...en8.de>,
	<linux-kernel@...r.kernel.org>,
	Boris Ostrovsky <boris.ostrovsky@....com>
Subject: [PATCH 1/2] AMD,x86: Clean up init_amd()

From: Boris Ostrovsky <boris.ostrovsky@....com>

Clean up multiple declarations of variable used for rd/wrmsr

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@....com>
---
 arch/x86/kernel/cpu/amd.c |   29 ++++++++++++-----------------
 1 files changed, 12 insertions(+), 17 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 15239ff..dd4a5b6 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -518,10 +518,9 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 {
 	u32 dummy;
-
-#ifdef CONFIG_SMP
 	unsigned long long value;
 
+#ifdef CONFIG_SMP
 	/*
 	 * Disable TLB flush filter by setting HWCR.FFDIS on K8
 	 * bit 6 of msr C001_0015
@@ -559,12 +558,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 		 * (AMD Erratum #110, docId: 25759).
 		 */
 		if (c->x86_model < 0x14 && cpu_has(c, X86_FEATURE_LAHF_LM)) {
-			u64 val;
-
 			clear_cpu_cap(c, X86_FEATURE_LAHF_LM);
-			if (!rdmsrl_amd_safe(0xc001100d, &val)) {
-				val &= ~(1ULL << 32);
-				wrmsrl_amd_safe(0xc001100d, val);
+			if (!rdmsrl_amd_safe(0xc001100d, &value)) {
+				value &= ~(1ULL << 32);
+				wrmsrl_amd_safe(0xc001100d, value);
 			}
 		}
 
@@ -617,13 +614,12 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	if ((c->x86 == 0x15) &&
 	    (c->x86_model >= 0x10) && (c->x86_model <= 0x1f) &&
 	    !cpu_has(c, X86_FEATURE_TOPOEXT)) {
-		u64 val;
 
-		if (!rdmsrl_safe(0xc0011005, &val)) {
-			val |= 1ULL << 54;
-			wrmsrl_safe(0xc0011005, val);
-			rdmsrl(0xc0011005, val);
-			if (val & (1ULL << 54)) {
+		if (!rdmsrl_safe(0xc0011005, &value)) {
+			value |= 1ULL << 54;
+			wrmsrl_safe(0xc0011005, value);
+			rdmsrl(0xc0011005, value);
+			if (value & (1ULL << 54)) {
 				set_cpu_cap(c, X86_FEATURE_TOPOEXT);
 				printk(KERN_INFO FW_INFO "CPU: Re-enabling "
 				  "disabled Topology Extensions Support\n");
@@ -637,11 +633,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	 */
 	if ((c->x86 == 0x15) &&
 	    (c->x86_model >= 0x02) && (c->x86_model < 0x20)) {
-		u64 val;
 
-		if (!rdmsrl_safe(0xc0011021, &val) && !(val & 0x1E)) {
-			val |= 0x1E;
-			wrmsrl_safe(0xc0011021, val);
+		if (!rdmsrl_safe(0xc0011021, &value) && !(value & 0x1E)) {
+			value |= 0x1E;
+			wrmsrl_safe(0xc0011021, value);
 		}
 	}
 
-- 
1.7.1


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