linux-kernel - [tip:perf/urgent] perf utils: Add perf_quiet

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Message-ID: <tip-80df1988201ac6648609eba13d48aef9f7974c10@git.kernel.org>
Date:   Tue, 21 Feb 2017 00:15:49 -0800
From:   tip-bot for Namhyung Kim <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jolsa@...nel.org, linux-kernel@...r.kernel.org,
        a.p.zijlstra@...llo.nl, tglx@...utronix.de, hpa@...or.com,
        namhyung@...nel.org, acme@...hat.com, mingo@...nel.org
Subject: [tip:perf/urgent] perf utils: Add perf_quiet_option()

Commit-ID:  80df1988201ac6648609eba13d48aef9f7974c10
Gitweb:     http://git.kernel.org/tip/80df1988201ac6648609eba13d48aef9f7974c10
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Fri, 17 Feb 2017 17:17:37 +0900
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 20 Feb 2017 11:16:32 -0300

perf utils: Add perf_quiet_option()

The perf_quiet_option() is to suppress all messages.  It's intended to
be called just after parsing options.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: kernel-team@....com
Link: http://lkml.kernel.org/r/20170217081742.17417-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/debug.c | 17 +++++++++++++++++
 tools/perf/util/debug.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index c1838b6..03eb81f 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -203,11 +203,28 @@ int perf_debug_option(const char *str)
 		v = (v < 0) || (v > 10) ? 0 : v;
 	}
 
+	if (quiet)
+		v = -1;
+
 	*var->ptr = v;
 	free(s);
 	return 0;
 }
 
+int perf_quiet_option(void)
+{
+	struct debug_variable *var = &debug_variables[0];
+
+	/* disable all debug messages */
+	while (var->name) {
+		*var->ptr = -1;
+		var++;
+	}
+
+	quiet = true;
+	return 0;
+}
+
 #define DEBUG_WRAPPER(__n, __l)				\
 static int pr_ ## __n ## _wrapper(const char *fmt, ...)	\
 {							\
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index d242adc..98832f5 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -54,5 +54,6 @@ int veprintf(int level, int var, const char *fmt, va_list args);
 
 int perf_debug_option(const char *str);
 void perf_debug_setup(void);
+int perf_quiet_option(void);
 
 #endif	/* __PERF_DEBUG_H */