On Wed, 2016-29-06 at 20:06:28 UTC, Darren Stevens wrote:

Commit:d6a9996e84ac4beb7713e9485f4563e100a9b03e (powerpc/mm:
    vmalloc abstraction in preparation for radix) turned kernel memory
    and IO addresses from #defined constants to variables initialised
    at runtime.
    
    On PA6T systems the setup_arch machine call initialises the onboard
    PCI-e root-ports, and uses pci_io_base to do this, which is now before
    its value has been set resulting in a panic right after 'booting 
    linux via __start()'

    Move the pci_io_base initialisation to the same place as vmalloc
    ranges are set (hash__early_init_mmu()/radix__early_init_mmu())
    
    Reported-by: Christian Zigotzky [off-list ref]
    Signed-off-by: Darren Stevens [off-list ref]
Reviewed-by: Aneesh Kumar K.V <redacted>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/bfa37087aa04e45f56c41142df

cheers