[PATCH v4 10/25] mm/mm_init: Move p2pdma page refcount initialisation to p2pdma

[David Hildenbrand]

>>
>>
>> But that's a bit weird: we call __init_single_page()->init_page_count() to
>> initialize it to 1, to then set it back to 0.
>>
>>
>> Maybe we can just pass to __init_single_page() the refcount we want to have
>> directly? Can be a patch on top of course.
> 
> Once the dust settles on this series we won't need the pgmap->type check at
> all because all ZONE_DEVICE pages will get an initial count of 0. I have some
> follow up clean-ups for after this series is applied (particularly with regards
> to pgmap refcounts), so if it's ok I'd rather do this as a follow-up.

Sure. For ordinary memory hotplug I'll also convert it to start with 
refcount=0 soonish, so there we're also simply pass 0 to __init_single_page.

-- 
Cheers,

David / dhildenb