[PATCH 3/5] perf trace: Explicitly enable system-wide mode if no option is given

[Namhyung Kim]

From: Namhyung Kim <namhyung.kim@xxxxxxx>

When no target cpu/user/task option is given, perf trace will do its
job system wide for all online cpus.  Make it explicit to reduce
possible confusion when reading code.

No functional changes intended.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
 tools/perf/builtin-trace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 7bb7e757c745..231b60690ce9 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -344,6 +344,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
 		return err;
 	}
 
+	if (perf_target__none(&trace.opts.target))
+		trace.opts.target.system_wide = true;
+
 	setup_pager();
 
 	return trace__run(&trace);
-- 
1.7.11.4

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