From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: dri-devel@lists.freedesktop.org
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linaro-mm-sig@lists.linaro.org, Rob Clark <rob@ti.com>,
Sumit Semwal <sumit.semwal@linaro.org>,
linux-media@vger.kernel.org
Subject: Re: [PATCH] dma-buf: Use EXPORT_SYMBOL
Date: Thu, 11 Oct 2012 14:52:41 +0200 [thread overview]
Message-ID: <2608521.UUolBFecrg@avalon> (raw)
In-Reply-To: <201210111336.45574.hverkuil@xs4all.nl>
Hi Hans,
On Thursday 11 October 2012 13:36:45 Hans Verkuil wrote:
> On Thu 11 October 2012 13:34:07 Alan Cox wrote:
> > > The whole purpose of this API is to let DRM and V4L drivers share
> > > buffers for zero-copy pipelines. Unfortunately it is a fact that
> > > several popular DRM drivers are closed source. So we have a choice
> > > between keeping the export symbols GPL and forcing those closed-source
> > > drivers to make their own incompatible API, thus defeating the whole
> > > point of DMABUF, or using EXPORT_SYMBOL and letting the closed source
> > > vendors worry about the legality. They are already using such functions
> > > (at least nvidia is), so they clearly accept that risk.
> >
> > Then they can accept the risk of ignoring EXPORT_SYMBOL_GPL and
> > calling into it anyway can't they. Your argument makes no rational sense
> > of any kind.
>
> Out of curiosity: why do we have both an EXPORT_SYMBOL and an
> EXPORT_SYMBOL_GPL if there is no legal difference?
>
> And if there is a difference between the two, then what is it?
As far as I understand, EXPORT_SYMBOL_GPL means "I consider closed-source
kernel modules as a GPL violation, you can have a different opinion, but then
don't use my APIs".
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2012-10-11 12:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-10 15:56 [PATCH] dma-buf: Use EXPORT_SYMBOL Robert Morell
2012-10-10 16:23 ` Mauro Carvalho Chehab
2012-10-10 18:17 ` Alan Cox
2012-10-10 21:02 ` Rob Clark
2012-10-11 6:57 ` Hans Verkuil
2012-10-11 11:34 ` Alan Cox
2012-10-11 11:36 ` Hans Verkuil
2012-10-11 12:10 ` Hans Verkuil
2012-10-11 12:52 ` Laurent Pinchart [this message]
2012-10-11 20:08 ` [Linaro-mm-sig] " Dave Airlie
2012-10-12 16:32 ` Alan Cox
2012-10-25 21:30 ` Dave Airlie
2012-10-16 21:22 ` Robert Morell
2012-10-17 9:53 ` Alan Cox
2012-10-17 9:54 ` [Linaro-mm-sig] " Dave Airlie
2012-10-17 10:08 ` Dave Airlie
2012-10-17 10:19 ` Dave Airlie
2012-10-17 10:25 ` Alan Cox
2012-10-17 10:22 ` Dave Airlie
2012-10-17 10:38 ` Alan Cox
2012-10-17 10:40 ` Dave Airlie
2012-10-10 23:22 ` Dave Airlie
2012-10-11 1:11 ` Mauro Carvalho Chehab
2012-10-11 2:50 ` Dave Airlie
2012-10-11 11:37 ` Alan Cox
2012-10-11 7:20 ` Hans Verkuil
2012-10-11 7:51 ` Hans Verkuil
2012-10-11 9:10 ` Maarten Lankhorst
2012-10-11 11:13 ` Mauro Carvalho Chehab
2012-10-11 13:47 ` Rob Clark
2012-10-11 14:55 ` Mauro Carvalho Chehab
2012-10-11 11:30 ` Alan Cox
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