Message-ID: <488A223F.80709@zytor.com>
Date: Fri, 25 Jul 2008 14:58:07 -0400
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Harvey Harrison <harvey.harrison@gmail.com>
CC: Linus Torvalds <torvalds@linux-foundation.org>,
       David Miller <davem@davemloft.net>,
       Andrew Morton <akpm@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] byteorder: force in-place endian conversion to always
 evaluate args
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Harvey Harrison wrote:
>> For what it's worth, the way to write a macro like this:
>>
>> #define __cpu_to_be64s(x) ((void)(x))
> 
> If you've looked at the byteorder rework I've done in -mm, these get
> unified in a single include/linux/byteorder.h and look like:

[inline functions]

What I meant with the above, was that it seems poorly understood how to 
write an empty "function-like" macro.

Obviously, inline functions don't have this problem, and is generally 
better anyway (type-safe even in the empty condition, for example.)

	-hpa

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