On Tue, 2019-04-09 at 06:03:24 UTC, Michael Ellerman wrote:
> The recent commit 8bc086899816 ("powerpc/mm: Only define
> MAX_PHYSMEM_BITS in SPARSEMEM configurations") removed our definition
> of MAX_PHYSMEM_BITS when SPARSEMEM is disabled.
>
> This inadvertently broke some 64-bit FLATMEM using configs with eg:
>
> arch/powerpc/include/asm/book3s/64/mmu-hash.h:584:6: error:
> "MAX_PHYSMEM_BITS" is not defined, evaluates to 0
> #if (MAX_PHYSMEM_BITS > MAX_EA_BITS_PER_CONTEXT)
> ^~~~~~~~~~~~~~~~
>
> Fix it by making sure we define MAX_PHYSMEM_BITS for all 64-bit
> configs regardless of SPARSEMEM.
>
> Fixes: 8bc086899816 ("powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM
> configurations")
> Reported-by: Andreas Schwab <sch...@linux-m68k.org>
> Reported-by: Hugh Dickins <hu...@google.com>
> Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
> Reviewed-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
Applied to powerpc fixes.
https://git.kernel.org/powerpc/c/cf7cf6977f531acd5dfe55250d0ee8cb
cheers
