[PATCH 1/2] powerpc: export ppc_tb_freq so that modules can reference it
dzu at denx.de
Tue Sep 21 22:34:58 EST 2010
> On Sat, 18 Sep 2010 14:22:12 -0400
> Josh Boyer <jwboyer at gmail.com> wrote:
>> Capitalizing? The patch you posted that uses this symbol is for a GPL
>> driver so you gain or lose nothing by having this symbol be
>> EXPORT_SYMBOL_GPL. Are you somehow advocating and getting some sort
>> of gain by allowing non-GPL modules? If so, I find that unfortunate.
>> If not, then I guess I don't understand what you mean by capitalizing.
> One can dislike DRM (even a very weak form such as this) without having
> a particular desire to go outside the bounds of what it allows.
> I thought EXPORT_SYMBOL_GPL was originally meant to indicate the
> symbols whose use is likely to be indicitave of code that is, in some
> copyright-meaningful way, derived from GPL code?
Google finds this, which coincides with what I remmber:
Some kernel developers are unhappy with providing external interfaces to
their code, only to see those interfaces being used by binary only
modules. They view it as their work being appropriated. Whether you
agree with that view or not is completely irrelevant, the person who
owns the copyright decides how their work can be used.
EXPORT_SYMBOL_GPL() allows for new interfaces to be marked as only
available to modules with a GPL compatible license. This is independent
of the kernel tainting, but obviously takes advantage of
EXPORT_SYMBOL_GPL() may only be used for new exported symbols, Linus has
spoken. I believe the phrase involved killer penguins with chainsaws for
anybody who changed existing exported interfaces.
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