[BISECTED REGRESSION] b43legacy broken on G4 PowerBook

[Christoph Hellwig]

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.