[PATCH 1/2] powerpc/85xx: fix problem that prevents PHYS_64BIT from configurable

[Tabi Timur-B04825]

On Thu, Feb 16, 2012 at 6:10 AM, Li Yang <leoli at freescale.com> wrote:
>
> The reason why we need to keep PHYS_64BIT option configurable is
> that enabling it cause negative performance impact on various
> aspects like TLB miss and physical address manipulating.  We should
> not enable it unless really needed, e.g. use large memory of 4GB
> or bigger.

I think we should make 36-bit the only option for the upstream
defconfigs, and if we want a 32-bit "optimized" kernel for the SDK,
then we provide that on the SDK only.

-- 
Timur Tabi
Linux kernel developer at Freescale