linux-kernel - [PATCH 03/17] ARM: pxa: Wunused-result warning in viper board file

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Date:	Tue,  2 Oct 2012 18:36:42 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...radead.org
Cc:	arm@...nel.org, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Marc Zyngier <maz@...terjones.org>
Subject: [PATCH 03/17] ARM: pxa: Wunused-result warning in viper board file

Calling kstrtoul requires checking the result. In case of
the viper_tpm_setup function, let's fail the __setup function
if the number was invalid.

Without this patch, building viper_defconfig results in:

arch/arm/mach-pxa/viper.c: In function 'viper_tpm_setup':
arch/arm/mach-pxa/viper.c:771:10: warning: ignoring return value of 'kstrtoul', declared with attribute warn_unused_result [-Wunused-result]

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: Haojian Zhuang <haojian.zhuang@...il.com>
Cc: Eric Miao <eric.y.miao@...il.com>
Cc: Marc Zyngier <maz@...terjones.org>
---
 arch/arm/mach-pxa/viper.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index 130379f..ac733e9 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -768,8 +768,7 @@ static unsigned long viper_tpm;
 
 static int __init viper_tpm_setup(char *str)
 {
-	strict_strtoul(str, 10, &viper_tpm);
-	return 1;
+	return strict_strtoul(str, 10, &viper_tpm) >= 0;
 }
 
 __setup("tpm=", viper_tpm_setup);
-- 
1.7.10

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