linux-kernel - Re: [PATCH] powerpc: Fix build warning

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Message-ID: <alpine.DEB.2.02.1406161824340.21018@chino.kir.corp.google.com>
Date:	Mon, 16 Jun 2014 18:25:24 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Guenter Roeck <linux@...ck-us.net>
cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: [PATCH] powerpc: Fix build warning

On Fri, 13 Jun 2014, Guenter Roeck wrote:

> If compiled with W=1, the following warning is seen in powerpc builds.
> 
> arch/powerpc/kernel/smp.c:750:18: warning:
> 	type qualifiers ignored on function return type
> static const int powerpc_smt_flags(void)
>                  ^
> 
> This is caused by a function returning 'const int', which doesn't
> make sense to gcc. Drop 'const' to fix the problem.
> 
> Reported-by: Vincent Guittot <vincent.guittot@...aro.org>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>

Acked-by: David Rientjes <rientjes@...gle.com>

Although it's strange you report this happening on line 750 in the 
changelog but the patch shows it differently.

> ---
>  arch/powerpc/kernel/smp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
> index 10ffffe..49d5d4e 100644
> --- a/arch/powerpc/kernel/smp.c
> +++ b/arch/powerpc/kernel/smp.c
> @@ -768,7 +768,7 @@ int setup_profiling_timer(unsigned int multiplier)
>  
>  #ifdef CONFIG_SCHED_SMT
>  /* cpumask of CPUs with asymetric SMT dependancy */
> -static const int powerpc_smt_flags(void)
> +static int powerpc_smt_flags(void)
>  {
>  	int flags = SD_SHARE_CPUPOWER | SD_SHARE_PKG_RESOURCES;
>  
--
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