linux-kernel - Re: [PATCH 02/16] ARM: binfmt_flat: unused variable 'persistent'

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Date:	Mon, 8 Oct 2012 15:50:27 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <arm@...nel.org>,
	Greg Ungerer <gerg@...inux.org>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Bryan Wu <bryan.wu@...onical.com>
Subject: Re: [PATCH 02/16] ARM: binfmt_flat: unused variable 'persistent'

On 06/10/12 00:55, Arnd Bergmann wrote:
> The flat_get_addr_from_rp() macro does not use the 'persistent' argument
> on ARM, causing a harmless compiler warning. A cast to void removes
> that warning.
>
> Without this patch, building at91x40_defconfig results in:
>
> fs/binfmt_flat.c: In function 'load_flat_file':
> fs/binfmt_flat.c:746:17: warning: unused variable 'persistent' [-Wunused-variable]
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Greg Ungerer <gerg@...inux.org>
> Cc: Russell King <rmk+kernel@....linux.org.uk>
> Cc: Bryan Wu <bryan.wu@...onical.com>

Acked-by: Greg Ungerer <gerg@...inux.org>

I can pick this one up to, and push to the arm-soc tree.

Regards
Greg


> ---
>   arch/arm/include/asm/flat.h |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/include/asm/flat.h b/arch/arm/include/asm/flat.h
> index 59426a4..e847d23 100644
> --- a/arch/arm/include/asm/flat.h
> +++ b/arch/arm/include/asm/flat.h
> @@ -8,7 +8,7 @@
>   #define	flat_argvp_envp_on_stack()		1
>   #define	flat_old_ram_flag(flags)		(flags)
>   #define	flat_reloc_valid(reloc, size)		((reloc) <= (size))
> -#define	flat_get_addr_from_rp(rp, relval, flags, persistent) get_unaligned(rp)
> +#define	flat_get_addr_from_rp(rp, relval, flags, persistent) ((void)persistent,get_unaligned(rp))
>   #define	flat_put_addr_at_rp(rp, val, relval)	put_unaligned(val,rp)
>   #define	flat_get_relocate_addr(rel)		(rel)
>   #define	flat_set_persistent(relval, p)		0
>


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Greg Ungerer  --  Principal Engineer        EMAIL:     gerg@...pgear.com
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