Re: [RFC PATCH 1/7] x86, mm: ZONE_DEVICE for "device memory"

[Christoph Hellwig]

On Wed, Aug 12, 2015 at 11:50:05PM -0400, Dan Williams wrote:
> arch_add_memory() is reorganized a bit in preparation for a new
> arch_add_dev_memory() api, for now there is no functional change to the
> memory hotplug code.

Instead of the new arch_add_dev_memory call I'd just add a bool device
argument to arch_add_memory and zone_for_memory (and later the altmap
pointer aswell).

arch_add_memory is a candidate to be factored into common code,
except for s390 everything could be done with two small arch callouts.
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