linux-kernel - Re: [patch 01/10] compiler: define __attribute_unused_

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Date:	Wed, 02 May 2007 15:40:03 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 01/10] compiler: define __attribute_unused__

On Tue, 2007-05-01 at 21:28 -0700, David Rientjes wrote:
> For all supported versions of gcc (major version 3 and above), functions
> and variables may be declared with __attribute__((unused)) to suppress
> warnings if they are declared but unused.

Adding this macro doesn't give us anything that simply saying
"__attribute__((unused))" doesn't give.  But it does add a layer of
kernel-specific indirection.

If we're going to get kernel-specific, I'd prefer to see:

__needed: suppress warning and don't discard,
__unneeded: suppress warning and might discard.

For me this fits better with how I think.

Rusty.

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