linux-kernel - Re: [PATCH] x86/mm: Export cpu

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Message-ID: <alpine.DEB.2.11.1509271244140.4500@nanos>
Date:	Sun, 27 Sep 2015 12:46:28 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andy Lutomirski <luto@...capital.net>
cc:	James Forcier <csssuf@...suf.net>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Jan Beulich <JBeulich@...e.com>, X86 ML <x86@...nel.org>,
	"Juergen Gross <jgross@...e.com, Toshi Kani" <toshi.kani@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86/mm: Export cpu_tlbstate as non-GPL symbol

On Thu, 24 Sep 2015, Andy Lutomirski wrote:
> On Sep 22, 2015 11:58 AM, "Thomas Gleixner" <tglx@...utronix.de> wrote:
> >
> > On Tue, 22 Sep 2015, Andy Lutomirski wrote:
> > > On Tue, Sep 22, 2015 at 11:51 AM, James Forcier <csssuf@...suf.net> wrote:
> > > > Exporting cpu_tlbstate as a GPL symbol was introduced in 1e02ce4c; however, this
> > > > breaks non-GPL modules which need to link against it, particularly the AMD
> > > > Catalyst drivers.
> > >
> > > What is AMD Catalyst doing with cpu_tlbstate?
> >
> > Fiddling with it behind the kernels back. Out of tree graphic drivers
> > always have their special needs. Just lookup the discussions about
> > unexporting init_mm ....
> 
> Look for kcl_mem_pat_setup here:
> 
> https://github.com/kolasa/fglrx-13.152/blob/master/firegl_public.c

I stopped looking at this line:

MODULE_LICENSE("GPL\0Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY");
 
Thanks,

	tglx
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