On Thu, Jun 13, 2019 at 07:59:51AM +1000, Benjamin Herrenschmidt wrote: > > With the patch for Kconfig above, and the original patch setting > > ARCH_ZONE_DMA_BITS to 30, everything works. > > > > Do you have any ideas on what should trigger the change in ARCH_ZONE_BITS? > > Should it be CONFIG_PPC32 defined, or perhaps CONFIG_G4_CPU defined? > > I think CONFIG_PPC32 is fine I'll cook up a patch unless someone beats me to it.