linux-kernel - [tip:perf/core] perf probe: Warn when more than one line are given

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Date:	Sun, 14 Aug 2011 15:44:20 GMT
From:	tip-bot for Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, paulus@...ba.org,
	hpa@...or.com, mingo@...hat.com, peterz@...radead.org,
	penberg@...nel.org, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, dsahern@...il.com, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:perf/core] perf probe: Warn when more than one line are given

Commit-ID:  13e27d7686c457c625242fc2c20be30eef942408
Gitweb:     http://git.kernel.org/tip/13e27d7686c457c625242fc2c20be30eef942408
Author:     Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
AuthorDate: Thu, 11 Aug 2011 20:02:53 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 12 Aug 2011 09:27:11 -0300

perf probe: Warn when more than one line are given

Check multiple --lines option and print warning informing that only the
first specified --line option is valid.

Changes from the 1st post:

- Accept only the first option instead of the last.
- Fix warning message according to David's comment.
- Mark as a bugfix.

Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: yrl.pp-manager.tt@...achi.com
Link: http://lkml.kernel.org/r/20110811110253.19900.96192.stgit@fedora15
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-probe.c |   14 +++++++++++---
 1 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 5f2a5c7..710ae3d 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -134,10 +134,18 @@ 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 one --line options are"
+			   " detected. Only the first one is valid.\n");
+		return 0;
+	}
+
 	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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