linux-kernel - Re: [RFC 1/5] ARM: dev_archdata: add private iommu extension

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Message-ID: <CAK=WgbY+YN6aj4+RUdPz068+H+vtnEx0_SbKuKc++S4AHRS_hw@mail.gmail.com>
Date:	Sun, 2 Oct 2011 20:48:41 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Hiroshi DOYU <Hiroshi.DOYU@...ia.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Joerg Roedel <Joerg.Roedel@....com>,
	iommu@...ts.linux-foundation.org, Arnd Bergmann <arnd@...db.de>,
	linux-kernel@...r.kernel.org, Cousson Benoit <b-cousson@...com>,
	Kevin Hilman <khilman@...com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [RFC 1/5] ARM: dev_archdata: add private iommu extension

On Tue, Sep 27, 2011 at 4:30 AM, Grant Likely <grant.likely@...retlab.ca> wrote:
> Blech.  Oh well.  Not much point in doing something different if x86
> uses a void*.

x86 probably does this because two different implementations needs to
plug their private data there: intel-iommu plugs there a 'struct
device_domain_info *' and amd_iommu uses it with a 'struct
iommu_dev_data *'.

On ARM we'd eventually end up with even a bigger variety, and I guess
that even if we'd use a type-safe member here, it would itself end up
having 'void *'.

If it looks reasonable to you, can I please have your Ack ?

Russell, can you please take a look too and ack/nack ?

Thanks,
Ohad.
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