linux-kernel - Re: [PATCH 3/6] firewire: char device interface

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Date:	Fri, 4 May 2007 10:48:17 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Kristian H??gsberg <krh@...hat.com>
Cc:	John Stoffel <john@...ffel.org>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux1394-devel <linux1394-devel@...ts.sourceforge.net>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 3/6] firewire: char device interface

On Wed, May 02, 2007 at 05:11:45PM -0400, Kristian H??gsberg wrote:
> The firewire-cdev.h file is meant to be a self-contained userspace header 
> file and shouldn't include other kernel header files.  All duplicated 
> values are standardized ieee1394 values and won't ever change.  I should 
> put a #ifndef __FW_COMMON_DEFINES protection around the duplicate values, I 
> guess, but I'm just wondering why I never saw a "symbol redefined" 
> warning...

No, defining things in two places is not okay.  Just add a new header
that defines these protocol constants, which needs to be included by
userspace that wants to use them.

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