[PATCH 6/9] powerpc, mm: Enable ZONE_DEVICE on powerpc

[Stephen Rothwell]

Hi Oliver,

On Wed, 12 Apr 2017 03:42:30 +1000 Oliver O'Halloran <oohall at gmail.com> wrote:
>
> Flip the switch. Running around and screaming "IT'S ALIVE" is optional,
> but recommended.
> 
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
> ---
>  mm/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 43d000e44424..d696af58f97f 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -724,7 +724,7 @@ config ZONE_DEVICE
>  	depends on MEMORY_HOTPLUG
>  	depends on MEMORY_HOTREMOVE
>  	depends on SPARSEMEM_VMEMMAP
> -	depends on X86_64 #arch_add_memory() comprehends device memory
> +	depends on (X86_64 || PPC_BOOK3S_64)  #arch_add_memory() comprehends device memory
>  

That's fine, but at what point do we create
CONFIG_ARCH_HAVE_ZONE_DEVICE, replace the "depends on
<archs/platforms>" above with "depends on ARCH_HAVE_ZONE_DEVICE" and
select that from the appropriate places?

-- 
Cheers,
Stephen Rothwell