linux-kernel - Re: [COMPAT] Add compat

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Message-ID: <20070929094852.GA7715@osiris.boeblingen.de.ibm.com>
Date:	Sat, 29 Sep 2007 11:48:52 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Kyle McMartin <kyle@...artin.ca>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [COMPAT] Add compat_merge64 helper

On Fri, Sep 28, 2007 at 06:33:51PM -0400, Kyle McMartin wrote:
> To be used when endianness matters for argument ordering when reassembling
> a 64-bit value out of two register halves.
> 
> Signed-off-by: Kyle McMartin <kyle@...artin.ca>
>
> +static inline u64 compat_merge64(u32 left, u32 right)
> +{
> +#if defined(__BIG_ENDIAN)
> +	return ((u64)left << 32) | right;
> +#else /* defined (__LITTLE_ENDIAN) */

Could you change that to an #elif please and #error out if none is defined?
Should safe us from subtle bugs caused by missing includes.
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