linux-kernel - Re: [PATCH 1/3] msm: Add gpio register address mapping information.

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Date:	Mon, 21 Jun 2010 10:28:33 -0700
From:	Bryan Huntsman <bryanh@...eaurora.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Pavel Machek <pavel@....cz>, Gregory Bean <gbean@...eaurora.org>,
	dwalker@...eaurora.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] msm: Add gpio register address mapping information.

Alan Cox wrote:
>>> Yeah. Either this can be replaced with GPL, and it such case just do
>>> so, or it can not, and then it can not be applied to kernel.
>>>
>> This is a standard BSD-style license so it's compatible w/ the GPL.  Thanks.
> 
> The kernel requires GPL, and its much much easier for everyone to state
> so explicitly to avoid future surprises (remember 4 clause BSD was once
> thought GPL compatible even by the FSF...)
> 
> If you want to make it clear it's also available BSD licensed in this
> form (at least until someone changes it) see the wording in files like
> drivers/char/random.c
> 
> That usually keeps all the lawyers happy.
> 
> Alan

Keeping the lawyers happy certainly has it's challenges.  Is it uncommon 
to use just a BSD-style license for headers?  I understand that everyone 
would prefer just GPL.  I'm primarily curious about preserving BSD 
licensing for headers under /include.  A dual license would work, but 
would it also be frowned upon to use just a 3-clause BSD license like we 
have in this patch?  Thanks.

- Bryan

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