linux-kernel - Re: [RFC PATCH] perf_core: provide a kernel-internal interface to get to performance counters

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Date:	Sat, 6 Feb 2010 12:46:39 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, peterz@...radead.org
Subject: Re: [RFC PATCH] perf_core: provide a kernel-internal interface to
	get to performance counters

On Fri, Feb 05, 2010 at 10:24:30PM -0800, Arjan van de Ven wrote:
> On Fri, 5 Feb 2010 10:47:48 -0500
> Christoph Hellwig <hch@...radead.org> wrote:
> 
> > On Fri, Sep 25, 2009 at 12:25:56PM +0200, Arjan van de Ven wrote:
> > > >From 5db5cd76f3c16c9f6093f54d1ccfb97d04b9a1ca Mon Sep 17 00:00:00
> > > >2001
> > > From: Arjan van de Ven <arjan@...ux.intel.com>
> > > Date: Fri, 25 Sep 2009 12:20:57 +0200
> > > Subject: [PATCH] perf_core: provide a kernel-internal interface to
> > > get to performance counters
> > 
> > So this patch got accepted into mainline a while ago, without a user
> > ever beeing presented, nevermind actually included in mainline.  Time
> > to revert providing these useless exports and dead code?
> > 
> 
> 
> Frederic had a user near mainline.
> 
> I have one but it's .35 material at this point...
> 
> if you want to insist to bounce the patch out now and back in
> for .35... I don't care but Frederic might.


We can't.
It has a user merged upstream: the hw-breakpoint subsystem.

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