linux-kernel - Re: Re-enabling non-GPL driver access to disk partition information

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Message-ID: <4B62FA46.9080602@redhat.com>
Date:	Fri, 29 Jan 2010 10:09:58 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Derek Atkins <warlord@....edu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Re-enabling non-GPL driver access to disk partition information

On 01/29/2010 09:15 AM, Derek Atkins wrote:
> Hi Linuxers,
>
> I've been working on a proprietary disk driver which has been working
> for the past couple years on Linux as old as 2.6.18.  Unfortunately,
> as of 2.6.28 it appears that some of the gendisk interfaces (read:
> structure members) I was using were moved behind an RCU and other
> GPL-ONLY accessor interfaces.

RCU is patented, with permission for GPL code to use the algorithm.

Exposing RCU bits to non-GPL modules would be rather pointless, since
those don't have permission (from IBM, the RCU patent holder) to use
RCU, anyway.

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