[PATCH v3 10/21] powerpc/mm: Define radix_enabled() in one place & use static inline

[Michael Ellerman]

Balbir Singh <bsingharora at gmail.com> writes:

> On Fri, 2016-07-29 at 21:42 +1000, Michael Ellerman wrote:
>> Nicholas Piggin <npiggin at gmail.com> writes:
>> > Won't MMU_FTRS_POSSIBLE just do the right thing when
>> > !CONFIG_PPC_RADIX_MMU?
>> Yes it should.
>>
>> I'll have to work out why Aneesh thought he needed to do it explicitly
>> and whether that is needed or not.
>
> IIRC, If CONFIG_PPC_RADIX_MMU=n MMU_FTR_RAIDX will not be present in the
> MMU_FTRS_POSSIBLE mask 

That's right.

The obvious thing to do would be to define MMU_FTR_RADIX to 0 when
RADIX=n, but that doesn't work because it breaks the ASM FTR macros
(because they check (mmu_features & mask) == mask).

So instead we just remove it from the possible mask.

cheers