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From: Arnd Bergmann <arnd@arndb.de>
To: Stefan Richter <stefanr@s5r6.in-berlin.de>
Subject: Re: [PATCH] Fix/add raw1394 CONFIG_COMPAT code
Date: Sun, 20 May 2007 17:03:36 +0200
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Cc: Petr Vandrovec <petr@vandrovec.name>, dan@dennedy.org,
       linux1394-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
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On Sunday 20 May 2007, Stefan Richter wrote:
> 
> > Note that this data structure only needs conversion on x86_64 and ia64, but
> > not on powerpc and other 64 bit architectures that align __u64 also in
> > 32 bit mode.
> 
> Is this conversion just unnecessary or actually harmful on ppc64 and others?

With the current patch, the compat_ioctl function does not handle the ppc32
version of the structure at all, so it's broken there, it would at least
need a 

	case RAW1394_IOC_GET_CYCLE_TIMER:
		err = raw1394_ioctl(NULL, file, cmd, arg);
		break;

	Arnd <><
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