Subject: Re: [PATCH v3 10/31] powerpc/mm: Don't use pmd_val,pud_val and pgd_val as lvalue

From: Michael Ellerman <[email-masked]>
Date: Tue, 13 Oct 2015 16:10:06 +1100

On Tue, 2015-10-13 at 00:09 +0530, Aneesh Kumar K.V wrote:
> We convert them static inline function here as we did with pte_val in
> the previous patch

This breaks ppc40x_defconfig & 40x/ep405_defconfig with:

  arch/powerpc/mm/40x_mmu.c: In function 'mmu_mapin_ram':
  arch/powerpc/mm/40x_mmu.c:113:20: error: lvalue required as left operand of assignment
  arch/powerpc/mm/40x_mmu.c:114:20: error: lvalue required as left operand of assignment
  arch/powerpc/mm/40x_mmu.c:115:20: error: lvalue required as left operand of assignment
  arch/powerpc/mm/40x_mmu.c:116:20: error: lvalue required as left operand of assignment
  arch/powerpc/mm/40x_mmu.c:128:18: error: lvalue required as left operand of assignment

Which is mainly:

	pmd_val(*pmdp++) = val;

The obvious patch to use pmd_set() doesn't work, I think because there's no
pmd_set() defined for 32-bit nohash?

cheers