linux-kernel - [PATCH 09/23] perf ftrace: Add -q/--quiet option

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Date:   Wed,  8 Mar 2017 00:08:37 +0900
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com
Subject: [PATCH 09/23] perf ftrace: Add -q/--quiet option

The -q/--quiet option is to suppress any message.  Sometimes users just
want to run the command and it can be used for that case.

Suggested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/Documentation/perf-ftrace.txt | 4 ++++
 tools/perf/builtin-ftrace.c              | 7 +++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index 6e6a8b22c859..361836114268 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -30,6 +30,10 @@ OPTIONS
 --verbose=::
         Verbosity level.
 
+-q::
+--quiet::
+	Do not show any message.
+
 -p::
 --pid=::
 	Trace on existing process id (comma separated list).
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 6087295f8827..2d8e8924cfe6 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -321,8 +321,8 @@ int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
 		   "tracer to use: function_graph(default) or function"),
 	OPT_STRING('p', "pid", &ftrace.target.pid, "pid",
 		   "trace on existing process id"),
-	OPT_INCR('v', "verbose", &verbose,
-		 "be more verbose"),
+	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
+	OPT_BOOLEAN('q', "quiet", &quiet, "do not show any message"),
 	OPT_BOOLEAN('a', "all-cpus", &ftrace.target.system_wide,
 		    "system-wide collection from all CPUs"),
 	OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu",
@@ -339,6 +339,9 @@ int cmd_ftrace(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (!argc && target__none(&ftrace.target))
 		usage_with_options(ftrace_usage, ftrace_options);
 
+	if (quiet)
+		perf_quiet_option();
+
 	ret = target__validate(&ftrace.target);
 	if (ret) {
 		char errbuf[512];
-- 
2.11.0