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

[Jeremy Fitzhardinge]

Eric W. Biederman wrote:
> How does gcc know to use %gs instead of the usual %fs for accessing
> the stack protector variable?  My older gcc-4.1.x on ubuntu always uses %fs.
>   

-mcmodel=kernel

> Or we could do something completely evil.  And use the other segment
> register for the stack canary.
>   

That would still require gcc changes, so it doesn't help much.

   J
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