linux-kernel - Re: [PATCH RT 7/9][RFC] [PATCH 7/9] cpu/rt: Rework cpu down for PREEMPT

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Date:	Fri, 2 Mar 2012 16:51:05 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	linux-kernel@...r.kernel.org,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Carsten Emde <C.Emde@...dl.org>,
	John Kacur <jkacur@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Clark Williams <clark.williams@...il.com>
Subject: Re: [PATCH RT 7/9][RFC] [PATCH 7/9] cpu/rt: Rework cpu down for
 PREEMPT_RT

On Fri, 2 Mar 2012, Steven Rostedt wrote:

> On Fri, 2012-03-02 at 16:20 +0100, Thomas Gleixner wrote:
> 
> > Already queued. I'd say #4 is a bug fix as well, though I
> > fundamentally hate the ass backwards semantics of that new function.
> 
> It is a bug fix, but I don't like it either. Note, that the patch didn't
> update the pin_current_cpu() code, which would have to be done too (to
> be a full fix).

I know.
 
> But I was also thinking that as a work around, as we plan on changing
> this code anyway. Instead of adding a new API which is ass backwards,
> just encompass the cpu_hotplug.lock instead. Something like this:

Thought about that already. It's way less fugly.
 
Thanks,

	tglx
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