Re: [PATCH 12/17] x86-64: Use absolute displacements for per-cpuaccesses.

[Tejun Heo]

Hello, Brian.

Brian Gerst wrote:
> Accessing memory through %gs should not use rip-relative addressing.
> Adding a P prefix for the argument tells gcc to not add (%rip) to
> the memory references.

Nice catch.  I dind't know about the P prefix thing.  It also is used
in other places too.  Hmmm... I can't find anything about the P
argument prefix in the gcc info page (4.3).  Any ideas where I can
find some information about it?  It's a bit weird that it's not a
constraint prefix but an argument one.

Thanks.

-- 
tejun
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