Re: [patch 04/15] Generic Mutex Subsystem, add-atomic-call-func-x86_64.patch

[Ingo Molnar]

* David Woodhouse <dwmw2@xxxxxxxxxxxxx> wrote:

> On Mon, 2005-12-19 at 09:49 -0800, Zwane Mwaikambo wrote:
> > Hi Ingo,
> >         Doesn't this corrupt caller saved registers?
> 
> Looks like it. I _really_ don't like calling functions from inline 
> asm. It's not nice. Can't we use atomic_dec_return() for this?

we can use atomic_dec_return(), but that will add one more instruction 
to the fastpath. OTOH, atomic_dec_return() is available on every 
architecture, so it's a really tempting thing. I'll experiment with it.

	Ingo
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