[PATCH 2/2] powerpc: Make context bits depend on virtual addr size.

[Aneesh Kumar K.V]

Benjamin Herrenschmidt <benh at kernel.crashing.org> writes:

> On Wed, 2013-02-13 at 00:01 +0530, Aneesh Kumar K.V wrote:
>> + * Be careful with this value. This determines the VSID_MODULUS_*  and that
>> + * need to be co-prime with VSID_MULTIPLIER*
>> + */
>> +#if defined(CONFIG_POWER6_CPU) || defined(CONFIG_POWER7_CPU)
>> +/*
>> + * Even if cpu support 68 bits, we limit this to 66 because
>> + * we support only 2^19 context.
>> + */
>> +#define MAX_VIRTUAL_ADDR_BITS 66
>> +#else
>> +/* power4,power 5 and cell is 65 */
>> +#define MAX_VIRTUAL_ADDR_BITS 65
>> +#endif
>> +
>
> A compile option ? Really ? Ugh...

I actually wanted that to be done in Kconfig.cputype, but haven't found
a nice way to do it. Considering we are switching between only two
values, I was thinking an #ifdef would work.

-aneesh