linux-kernel - Re: [PATCH]x86-tsc.c : fix compile warning

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Date:	Wed, 17 Jun 2009 19:47:21 +0530
From:	Subrata Modak <subrata@...ux.vnet.ibm.com>
To:	"Figo.zhang" <figo1802@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>,
	Sumit Panchasara <sumit.panchasara@...fochips.com>,
	"'Sachin P Sant'" <sachinp@...ux.vnet.ibm.com>,
	"'H. Peter Anvin'" <hpa@...or.com>,
	"'Frans Pop'" <elendil@...net.nl>,
	"'Andi Kleen'" <andi@...stfloor.org>,
	"'Thomas Gleixner'" <tglx@...utronix.de>,
	"'Balbir Singh'" <balbir@...ux.vnet.ibm.com>
Subject: Re: [PATCH]x86-tsc.c : fix compile warning

> fix compile warning:
> arch/x86/kernel/tsc.c: In function ‘time_cpufreq_notifier’:
> arch/x86/kernel/tsc.c:635: warning: ‘dummy’ may be used uninitialized in
> this function
> 
> Signed-off-by: Figo.zhang <figo1802@...il.com>

Hello Figo,

Please refer to the following links on discussion on this issue earlier:
http://lkml.org/lkml/2009/5/19/312
http://lkml.org/lkml/2009/5/19/301
http://lkml.org/lkml/2009/5/20/23

I tried to fix it in some other way.

Regards--
Subrata

> ---
> arch/x86/kernel/tsc.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
> index ae3180c..e65492a 100644
> --- a/arch/x86/kernel/tsc.c
> +++ b/arch/x86/kernel/tsc.c
> @@ -632,7 +632,7 @@ static int time_cpufreq_notifier(struct
> notifier_block *nb, unsigned long val,
>                                void *data)
>  {
>        struct cpufreq_freqs *freq = data;
> -       unsigned long *lpj, dummy;
> +       unsigned long *lpj, dummy = 0;
> 
>        if (cpu_has(&cpu_data(freq->cpu), X86_FEATURE_CONSTANT_TSC))
>                return 0;
> 


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