linux-kernel - Re: [PATCH] ubi: kill homegrown endian macros

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Date:	Fri, 18 May 2007 09:38:35 +0100
From:	Al Viro <viro@....linux.org.uk>
To:	Artem Bityutskiy <dedekind@...dex.ru>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, dedekind@...radead.org,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] ubi: kill homegrown endian macros

On Fri, May 18, 2007 at 09:58:25AM +0300, Artem Bityutskiy wrote:
> Al Viro wrote:
> >BTW, you can simply typedef __be16 ubi16_t; etc. and define conversion
> >functions as cpu_to_ubi16(x) being (__force ubi16_t)cpu_to_be16(x), etc.
> >
> >sparse will do all checks just fine, you still have bitwise operations
> >(might or might be not relevant in your case) and for gcc it simply
> >becomes __be16, etc - i.e. an integer type.
> 
> Err, what is the benefit of it? If we relied on sparce, why not would we be
> just using __be16 directly?

Because you might legitimately want your type to be *not* mixed with whatever
other big-endian 16bit types you have out there?
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