linux-kernel - [tip:x86/gcc46] x86, gcc-4.6: Fix set but not read variables

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Message-ID: <tip-fa10ba64ac94fec4611b79804023eb087862ffe0@git.kernel.org>
Date:	Tue, 20 Jul 2010 23:55:02 GMT
From:	tip-bot for Andi Kleen <andi@...stfloor.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	andi@...stfloor.org, akpm@...ux-foundation.org, ak@...ux.intel.com,
	tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/gcc46] x86, gcc-4.6: Fix set but not read variables

Commit-ID:  fa10ba64ac94fec4611b79804023eb087862ffe0
Gitweb:     http://git.kernel.org/tip/fa10ba64ac94fec4611b79804023eb087862ffe0
Author:     Andi Kleen <andi@...stfloor.org>
AuthorDate: Tue, 20 Jul 2010 15:19:49 -0700
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Tue, 20 Jul 2010 15:38:30 -0700

x86, gcc-4.6: Fix set but not read variables

Just some dead code, no real bugs.

Found by gcc 4.6 -Wall

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
LKML-Reference: <201007202219.o6KMJnQ0021072@...p1.linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/aperture_64.c      |    4 ++--
 arch/x86/kernel/cpu/mtrr/generic.c |    3 +--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index b5d8b0b..a2e0caf 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -280,7 +280,7 @@ void __init early_gart_iommu_check(void)
 	 * or BIOS forget to put that in reserved.
 	 * try to update e820 to make that region as reserved.
 	 */
-	u32 agp_aper_base = 0, agp_aper_order = 0;
+	u32 agp_aper_order = 0;
 	int i, fix, slot, valid_agp = 0;
 	u32 ctl;
 	u32 aper_size = 0, aper_order = 0, last_aper_order = 0;
@@ -291,7 +291,7 @@ void __init early_gart_iommu_check(void)
 		return;
 
 	/* This is mostly duplicate of iommu_hole_init */
-	agp_aper_base = search_agp_bridge(&agp_aper_order, &valid_agp);
+	search_agp_bridge(&agp_aper_order, &valid_agp);
 
 	fix = 0;
 	for (i = 0; i < ARRAY_SIZE(bus_dev_ranges); i++) {
diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c
index fd31a44..7d28d7d 100644
--- a/arch/x86/kernel/cpu/mtrr/generic.c
+++ b/arch/x86/kernel/cpu/mtrr/generic.c
@@ -433,13 +433,12 @@ static void generic_get_mtrr(unsigned int reg, unsigned long *base,
 {
 	unsigned int mask_lo, mask_hi, base_lo, base_hi;
 	unsigned int tmp, hi;
-	int cpu;
 
 	/*
 	 * get_mtrr doesn't need to update mtrr_state, also it could be called
 	 * from any cpu, so try to print it out directly.
 	 */
-	cpu = get_cpu();
+	get_cpu();
 
 	rdmsr(MTRRphysMask_MSR(reg), mask_lo, mask_hi);
 
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