On Thu, Jun 04, 2020 at 01:32:40PM +0200, David Hildenbrand wrote:
> Just a thought: If memory hotplug is applicable as well, you might
> either want to always assume data->enable_4GB, or handle memory hotplug
> events from the memory notifier, when new memory gets onlined (not sure
> how tricky that is).

We probably want a highest_pfn_possible() or similar API instead of
having drivers poking into random VM internals.
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