linux-kernel - [PATCH -tip 10/12] perf probe: Warn when more than two lines are given

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Message-ID: <20110330092634.2132.45774.stgit@ltc236.sdl.hitachi.co.jp>
Date:	Wed, 30 Mar 2011 18:26:34 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Lin Ming <ming.m.lin@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, 2nddept-manager@....hitachi.co.jp,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Subject: [PATCH -tip 10/12] perf probe: Warn when more than two lines are given

Print warning which warns only the last specified --line option is valid.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
---

 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");
 	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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