linux-kernel - Re: [PATCH] perf_counter: Fix a race on perf_counter

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Date:	Mon, 10 Aug 2009 15:46:08 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	"Metzger, Markus T" <markus.t.metzger@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"hpa@...or.com" <hpa@...or.com>,
	"markus.t.metzger@...il.com" <markus.t.metzger@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH] perf_counter: Fix a race on perf_counter_ctx


* Metzger, Markus T <markus.t.metzger@...el.com> wrote:

> I've been using some old version of perf. When I try to build the 
> version for the latest -tip, I get the following build error:
> 
> builtin-annotate.o: In function `print_summary':
> /home/markus/linux/git-tip/tools/perf/builtin-annotate.c:1211: undefined reference to `rb_first'
> /home/markus/linux/git-tip/tools/perf/builtin-annotate.c:1223: undefined reference to `rb_next'
> builtin-annotate.o: In function `insert_source_line':

Weird. How do you build perf? Do you do:

  cd tools/perf/
  make

? does your build directory have the ../../lib/rbtree.c file?

	Ingo

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