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@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170217081742.17417-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index c1838b6..03eb81f 100644 (file)
--- 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 (file)
--- 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 */