[Xen-devel] Re: [RFC PATCH 09/33] Add start-of-day setup hooks to subarch

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Keir Fraser wrote:
> > > +struct shared_info *HYPERVISOR_shared_info = (struct shared_info 
> > > *)empty_zero_page;
> > > +EXPORT_SYMBOL(HYPERVISOR_shared_info);
> > > ...
> > EXPORT_SYMBOL_GPL?
> Interrupt-control macros (local_irq_enable/disable and friends) used 
> this symbol, so GPLing it made non-GPL modules fail. We made a bunch 
> of the macros proper functions so this may no longer be the case.
Given that this is just a page exported from the hypervisor, it doesn't 
make much sense to impose a GPL requirement on this symbol (to put it 
another way, this is more part of the Xen ABI than the Linux API, so 
Linux can't make much claim to it).
   J

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