[RFC 4/7] powerpc/mm: Set MAX_ZONE_PFN to 0 for all zones beyond TOP_ZONE

[Balbir Singh]

On 03/05/16 16:29, Anshuman Khandual wrote:
> From: Oliver O'Halloran <oohall at gmail.com>
> 
> All the memory zones past TOP_ZONE are managed by generic mm code. Zone
> max PFN should be set to 0 instead of ~0UL since that's what the generic
> mm code expects. Without this, kernel assigns all pages into ZONE_DEVICE
> zone which is not part of buddy allocator, hence kernel cannot allocate
> any memory and even fails to boot.
> 
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>

Reviewed-by: Balbir Singh <bsingharora at gmail.com>