[PATCH] ARM: implement optimized percpu variable access

[Russell King - ARM Linux]

On Thu, Nov 22, 2012 at 11:34:01AM +0000, Will Deacon wrote:
> (3) Just make the thing depend on __LINUX_ARM_ARCH__ >= 7. Yes, we lose on
>     11MPCore, but we win on A8 and the code is much, much simpler.

We also lose it in kernels built for mutli-platform, such as OMAP which
needs to cover both ARMv7 and ARMv6.