Re: powerpc/mm: Define MAX_PHYSMEM_BITS for all 64-bit configs
From: Michael Ellerman <hidden>
Date: 2019-04-10 14:53:05
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 <redacted>
Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Aneesh Kumar K.V <redacted>Applied to powerpc fixes. https://git.kernel.org/powerpc/c/cf7cf6977f531acd5dfe55250d0ee8cb cheers