Re: [PATCH] Remove unnecessary irq disabling

On Wed, May 02, 2007 at 11:58:17AM +0200, Andi Kleen wrote:

What does that break, or was it already broken and this fixes it?
I think neither. This function is only called at early bootup,
(start_secondary() ), and most of its callees have interrupts off anyway.
But maybe we do lose something. Andi, do you have a word on this?

We need to enable them somewhere, but cpu_idle will do it in the end.
So it should be safe to drop it. I guess keeping them disabled the whole
time will be a little safer against potential races.
yeah, that's exactly what I've thought. We enable interrupts (to disable
them afterwards) in smp_callin(), to avoid waking up Mr. Watchdog. I
guess it won't be a problem after that, will it?

--
Glauber de Oliveira Costa
Red Hat Inc.
"Free as in Freedom"
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