[PATCH v4 1/6] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig

[Michael Ellerman]

Oliver O'Halloran <oohall at gmail.com> writes:

> Currently ZONE_DEVICE depends on X86_64 and this will get unwieldly as
> new architectures (and platforms) get ZONE_DEVICE support. Move to an
> arch selected Kconfig option to save us the trouble.
>
> Cc: linux-mm at kvack.org
> Acked-by: Ingo Molnar <mingo at kernel.org>
> Acked-by: Balbir Singh <bsingharora at gmail.com>
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
> ---
> Andew, the rest of the series should be going in via the ppc tree, but
> since there's nothing ppc specific about this patch do you want to
> take it via mm?

Except without this patch none of the rest of the series can be tested
on powerpc, because the code doesn't go live until ARCH_HAS_ZONE_DEVICE
is wired up for powerpc.

So it'd be better if the series stayed together, wherever it goes. I'll
pick it up unless Andrew objects.

cheers