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Date: Fri, 18 Jun 2004 22:20:14 +0100
From: Russell King <rmk+lkml@arm.linux.org.uk>
To: James Bottomley <James.Bottomley@steeleye.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Jamey Hicks <jamey.hicks@hp.com>, Ian Molton <spyro@f2s.com>,
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       Greg KH <greg@kroah.com>, tony@atomide.com,
       David Brownell <david-b@pacbell.net>, joshua@joshuawise.com
Subject: Re: DMA API issues
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In-Reply-To: <1087590286.2135.161.camel@mulgrave>; from James.Bottomley@steeleye.com on Fri, Jun 18, 2004 at 03:24:45PM -0500
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On Fri, Jun 18, 2004 at 03:24:45PM -0500, James Bottomley wrote:
> On Fri, 2004-06-18 at 15:14, Benjamin Herrenschmidt wrote:
> > I wanted to do just that a while ago, and ended up doing things a bit
> > differently, but still, I agree that would help. The thing is, you
> > can do that in your platform code. just use the platform data pointer
> > in struct device to stuff a ptr to the structure with your "ops"
> 
> Yes, we do this on parisc too.  We actually have a hidden method pointer
> (per platform) and cache the iommu (we have more than one) accessors in
> platform_data.

Except that platform_data already has multiple other uses, especially for
platform devices.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core