Re: [RFC 00/15] x86_64: Optimize percpu accesses

[Jeremy Fitzhardinge]

Ingo Molnar wrote:
> Note that the zero-based percpu problems are completely unrelated to 
> stackprotector. I was able to hit them with a stackprotector-disabled 
> gcc-4.2.3 environment.

The only reason we need to keep a zero-based pda is to support 
stack-protector.  If we drop drop it, we can drop the pda - and its 
special zero-based properties - entirely.

   J
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