linux-kernel - Re: [PATCH 04/12] perf tools: Convert to LIBUNWIND

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Message-ID: <20121001084506.GA3168@krava.brq.redhat.com>
Date:	Mon, 1 Oct 2012 10:45:06 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 04/12] perf tools: Convert to LIBUNWIND_SUPPORT

On Fri, Sep 28, 2012 at 06:32:00PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim <namhyung.kim@....com>
> 
> For building perf without libunwind, we can set NO_LIBUNWIND=1 as a
> argument of make.  It then defines NO_LIBUNWIND_SUPPORT macro for C
> code to do the proper handling.  However it usually used in a negative
> semantics - e.g. #ifndef - so we saw double negations which can be
> misleading.  Convert it to a positive form to make it more readable.
> 
> Also change NO_PERF_REGS macro to HAVE_PERF_REGS for the same reason.
> 
> Cc: Jiri Olsa <jolsa@...hat.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Acked-by: Jiri Olsa <jolsa@...hat.com>
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