linux-kernel - [PATCH] [3/23] x86: Avoid unused by set variables in rdmsr

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Date:	Thu, 10 Jun 2010 13:10:38 +0200 (CEST)
From:	Andi Kleen <andi@...stfloor.org>
To:	x86@...nel.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [3/23] x86: Avoid unused by set variables in rdmsr


Avoids quite a lot of warnings with a gcc 4.6 -Wall build
because this happens in a commonly used header file (apic.h)

Cc: x86@...nel.org

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 arch/x86/include/asm/msr.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.35-rc2-gcc/arch/x86/include/asm/msr.h
===================================================================
--- linux-2.6.35-rc2-gcc.orig/arch/x86/include/asm/msr.h
+++ linux-2.6.35-rc2-gcc/arch/x86/include/asm/msr.h
@@ -148,8 +148,8 @@ static inline unsigned long long native_
 #define rdmsr(msr, val1, val2)					\
 do {								\
 	u64 __val = native_read_msr((msr));			\
-	(val1) = (u32)__val;					\
-	(val2) = (u32)(__val >> 32);				\
+	(void)((val1) = (u32)__val);				\
+	(void)((val2) = (u32)(__val >> 32));			\
 } while (0)
 
 static inline void wrmsr(unsigned msr, unsigned low, unsigned high)
--
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