linux-kernel - Re: [PATCH 1/2] NOMMU: Set BDI capabilities for /dev/mem and /dev/kmem

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Message-Id: <20060830080518.155c9d59.akpm@osdl.org>
Date:	Wed, 30 Aug 2006 08:05:18 -0700
From:	Andrew Morton <akpm@...l.org>
To:	David Howells <dhowells@...hat.com>
Cc:	torvalds@...l.org, linux-kernel@...r.kernel.org,
	uclinux-dev@...inux.org
Subject: Re: [PATCH 1/2] NOMMU: Set BDI capabilities for /dev/mem and
 /dev/kmem

On Wed, 30 Aug 2006 09:38:42 +0100
David Howells <dhowells@...hat.com> wrote:

> > Or you could use the approach I suggested, like wot everyone else does.
> 
> Ummm...  I don't recall ever coming across a construct like that in the
> kernel.

box:/usr/src/linux-2.6.18-rc5> grep -r '^#define.*suspend[      ]*NULL' . | wc -l
75

We do it to reduce (and to localise) ifdefs.
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