From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai] __ipipe_root_status exported GPL only but used to be not GPL only and is breaking other code
Date: Wed, 10 Dec 2014 20:12:28 +0100 [thread overview]
Message-ID: <20141210191228.GS1524@hermes.click-hack.org> (raw)
In-Reply-To: <20141210190939.GD24110@csclub.uwaterloo.ca>
On Wed, Dec 10, 2014 at 02:09:39PM -0500, Lennart Sorensen wrote:
> On Wed, Dec 10, 2014 at 08:05:09PM +0100, Gilles Chanteperdrix wrote:
> > Ah, you mean the problem is with a module which does not use Xenomai
> > ? That is unfortunate.
>
> Yes, and only becasue ipipe messes with the task structures in some way
> and the change in the export of that symbol is causing the problem.
>
> Certainly the mainline kernel does not allow existing calls to get broken
> by other changes. Perhaps ipipe should follow the same rule and revert
> the change to that symbol.
The I-pipe messing with task_struct is not involved here. Using
EXPORT_SYMBOL_GPL instead of EXPORT_SYMBOL is what causes the kernel
to refuse loading a module not using the GPL license trying to use
that symbol. That is the purpose of EXPORT_SYMBOL_GPL.
Using EXPORT_SYMBOL_GPL is done by a lot of modules which "follow
the rules", I-pipe included.
--
Gilles.
next prev parent reply other threads:[~2014-12-10 19:12 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-10 18:37 [Xenomai] __ipipe_root_status exported GPL only but used to be not GPL only and is breaking other code Lennart Sorensen
2014-12-10 18:42 ` Gilles Chanteperdrix
2014-12-10 19:02 ` Lennart Sorensen
2014-12-10 19:04 ` Lennart Sorensen
2014-12-10 19:05 ` Gilles Chanteperdrix
2014-12-10 19:09 ` Lennart Sorensen
2014-12-10 19:11 ` Lennart Sorensen
2014-12-10 19:12 ` Gilles Chanteperdrix [this message]
2014-12-10 19:13 ` Gilles Chanteperdrix
2014-12-10 19:19 ` Lennart Sorensen
2014-12-10 19:24 ` Gilles Chanteperdrix
2014-12-10 19:39 ` Lennart Sorensen
2014-12-10 19:47 ` Gilles Chanteperdrix
2014-12-10 19:55 ` Lennart Sorensen
2014-12-10 19:59 ` Gilles Chanteperdrix
2014-12-10 20:05 ` Lennart Sorensen
2014-12-10 19:44 ` Gilles Chanteperdrix
2014-12-10 19:52 ` Lennart Sorensen
2014-12-10 19:57 ` Gilles Chanteperdrix
2014-12-10 20:12 ` Lennart Sorensen
2014-12-10 19:45 ` Philippe Gerum
2014-12-10 19:44 ` Lennart Sorensen
2014-12-10 20:13 ` Philippe Gerum
2014-12-10 20:11 ` Lennart Sorensen
2014-12-10 20:38 ` Philippe Gerum
2014-12-10 21:16 ` Lennart Sorensen
2014-12-10 21:23 ` Lennart Sorensen
2014-12-10 21:55 ` Jeff Webb
2014-12-10 22:01 ` Lennart Sorensen
2014-12-10 23:18 ` Jeff Webb
2014-12-10 20:53 ` Jeff Webb
2014-12-10 21:58 ` Gilles Chanteperdrix
2014-12-22 10:06 ` Jan Kiszka
2014-12-22 11:19 ` Philippe Gerum
2014-12-22 14:46 ` Lennart Sorensen
2014-12-22 15:00 ` Philippe Gerum
2014-12-22 19:08 ` Lennart Sorensen
2014-12-22 14:42 ` Lennart Sorensen
2014-12-22 14:44 ` Jan Kiszka
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