linux-kernel - Re: [PATCH 7/7] [v4] drivers/virt: introduce Freescale hypervisor management driver

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Message-ID: <4DF11715.5030001@freescale.com>
Date:	Thu, 9 Jun 2011 13:55:17 -0500
From:	Timur Tabi <timur@...escale.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linuxppc-dev@...ts.ozlabs.org>, <alan@...rguk.ukuu.org.uk>,
	<kumar.gala@...escale.com>, <benh@...nel.crashing.org>,
	<greg@...ah.com>, <akpm@...nel.org>, <cmetcalf@...era.com>,
	<konrad.wilk@...cle.com>, <dsaxena@...aro.org>,
	<linux-kernel@...r.kernel.org>, <linux-console@...r.kernel.org>
Subject: Re: [PATCH 7/7] [v4] drivers/virt: introduce Freescale hypervisor
 management driver

Arnd Bergmann wrote:
> Then get rid of all the code that takes apart the ioctl command numbers
> again and just do a switch/case based on the command.

I still need to keep that code to maintain binary compatibility with existing
applications that pass the union as a parameter.

I'll fix that after we've updated the applications.  But we have a
chicken-or-the-egg problem where we need the same application to work with the
new and old ioctl interface for a period of time.

-- 
Timur Tabi
Linux kernel developer at Freescale

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