[PATCH v3 2/2] powerpc: add support for MPIC message register API

[Scott Wood]

On Fri, 17 Jun 2011 15:33:04 +1000
Benjamin Herrenschmidt <benh at kernel.crashing.org> wrote:

> On Tue, 2011-05-31 at 14:19 -0500, Meador Inge wrote:
> > +void mpic_msgr_enable(struct mpic_msgr *msgr)
> > +{
> > +	out_be32(msgr->mer, in_be32(msgr->mer) | (1 << msgr->num));
> > +}
> > +EXPORT_SYMBOL(mpic_msgr_enable);
> 
> Why are all those exported non-GPL ? We have a policy of making new
> in-kernel APIs generally GPL only.

From Documentation/DocBook/kernel-hacking.tmpl:

  <sect1 id="sym-exportsymbols-gpl">
   <title><function>EXPORT_SYMBOL_GPL()</function>   
    <filename class="headerfile">include/linux/module.h</filename></title>
                                                     
   <para>                                            
    Similar to <function>EXPORT_SYMBOL()</function> except that the
    symbols exported by <function>EXPORT_SYMBOL_GPL()</function> can
    only be seen by modules with a                   
    <function>MODULE_LICENSE()</function> that specifies a GPL
    compatible license.  It implies that the function is considered
    an internal implementation issue, and not really an interface.
   </para>                                           
  </sect1>

When did this change from "considered an internal implementation issue, and
not really an interface" to "all new interfaces"?

-Scott