linux-kernel - Re: [PATCH] ARM: vfp: Silence mvfr0 unused variable warning

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Date:	Wed, 19 Nov 2014 08:14:38 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-next@...r.kernel.org, Will Deacon <will.deacon@....com>,
	Rob Clark <robdclark@...il.com>
Subject: Re: [PATCH] ARM: vfp: Silence mvfr0 unused variable warning

Hi Stephen,

On Tue, 18 Nov 2014 12:56:31 -0800 Stephen Boyd <sboyd@...eaurora.org> wrote:
>
> Stephen Rothwell reports that commit 3f4c9f8f0a20 ("ARM: 8197/1:
> vfp: Fix VFPv3 hwcap detection on CPUID based cpus") introduced an
> unused variable warning.
> 
> arch/arm/vfp/vfpmodule.c: In function 'vfp_init':
> arch/arm/vfp/vfpmodule.c:725:6: warning: unused variable 'mvfr0'
> [-Wunused-variable]
>   u32 mvfr0;
> 
> Silence this warning by using IS_ENABLED instead of ifdefs.
> 
> Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>

Looks good (though I haven't tested it).  One small nit below:

> +		if (IS_ENABLED(CONFIG_VFPv3)) {
> +			mvfr0 = fmrx(MVFR0);

Now that you have a block here, you could move the declaration of mvfr0
into this block, right?

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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