On Wed, 2019-06-12 at 14:41 -0500, Larry Finger wrote: > On 6/12/19 1:55 AM, Christoph Hellwig wrote: > > > > Ooops, yes. But I think we could just enable ZONE_DMA on 32-bit > > powerpc. Crude enablement hack below: > > > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > > index 8c1c636308c8..1dd71a98b70c 100644 > > --- a/arch/powerpc/Kconfig > > +++ b/arch/powerpc/Kconfig > > @@ -372,7 +372,7 @@ config PPC_ADV_DEBUG_DAC_RANGE > > > > config ZONE_DMA > > bool > > - default y if PPC_BOOK3E_64 > > + default y > > > > config PGTABLE_LEVELS > > int > > > > 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 Ben.
