[PATCH RFC 15/21] perf intel-pt: Use evlist__add_system_wide_dummy() for switch tracking

[Adrian Hunter <adrian.hunter@intel.com>]

Use evlist__add_system_wide_dummy() for switch tracking in preparation for
allowing system-wide events on all CPUs while the user requested events are
on only user requested CPUs.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 tools/perf/arch/x86/util/intel-pt.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c
index 2eaac4638aab..e45d64dec57c 100644
--- a/tools/perf/arch/x86/util/intel-pt.c
+++ b/tools/perf/arch/x86/util/intel-pt.c
@@ -811,18 +811,11 @@ static int intel_pt_recording_options(struct auxtrace_record *itr,
 			if (!cpu_wide && perf_can_record_cpu_wide()) {
 				struct evsel *switch_evsel;
 
-				err = parse_events(evlist, "dummy:u", NULL);
-				if (err)
-					return err;
+				switch_evsel = evlist__add_system_wide_dummy(evlist);
+				if (!switch_evsel)
+					return -ENOMEM;
 
-				switch_evsel = evlist__last(evlist);
-
-				switch_evsel->core.attr.freq = 0;
-				switch_evsel->core.attr.sample_period = 1;
 				switch_evsel->core.attr.context_switch = 1;
-
-				switch_evsel->core.system_wide = true;
-				switch_evsel->no_aux_samples = true;
 				switch_evsel->immediate = true;
 
 				evsel__set_sample_bit(switch_evsel, TID);
-- 
2.25.1