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From: Andrey Borzenkov <arvidjaar@mail.ru>
To: linux-kernel@vger.kernel.org
Subject: Avoiding "unused variable" warnings
Date: Sun, 13 Jul 2003 19:32:23 +0400
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I think I have seen it somewhere but forgot.

Is it possible to create a noop macro that makes compiler believe macro 
arguments are used? I mean the case of debug macro that for debug off is 
redefined as something like do { } while(0) but then if arguments are used 
for debugging purposes only compiler emits warning. Some people do not like 
it :)

TIA

-andrey