linux-kernel - Re: [PATCH -tip 10/13] [RESEND]perf probe: Warn when more than two lines are given

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Date:	Tue, 28 Jun 2011 08:15:54 -0600
From:	David Ahern <dsahern@...il.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
CC:	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, yrl.pp-manager.tt@...achi.com,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: Re: [PATCH -tip 10/13] [RESEND]perf probe: Warn when more than two
 lines are given



On 06/27/2011 01:27 AM, Masami Hiramatsu wrote:
> Print warning which warns only the last specified --line option is valid.
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
> ---
> 
>  tools/perf/builtin-probe.c |   11 ++++++++---
>  1 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
> index 2c0e64d..4f3460a 100644
> --- a/tools/perf/builtin-probe.c
> +++ b/tools/perf/builtin-probe.c
> @@ -134,10 +134,15 @@ static int opt_show_lines(const struct option *opt __used,
>  {
>  	int ret = 0;
>  
> -	if (str)
> -		ret = parse_line_range_desc(str, &params.line_range);
> -	INIT_LIST_HEAD(&params.line_range.line_list);
> +	if (!str)
> +		return 0;
> +
> +	if (params.show_lines)
> +		pr_warning("Warning: more than two --line option are"
> +			   " detected. Only last option is valid.\n");

This detects a second --line option, but your warning suggests two
--line options are ok. Should that warning be "more than one --line
option is"

David

>  	params.show_lines = true;
> +	ret = parse_line_range_desc(str, &params.line_range);
> +	INIT_LIST_HEAD(&params.line_range.line_list);
>  
>  	return ret;
>  }
> 
> --
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