linux-kernel - [PATCH v1 22/26] perf auxevent: Add explicit dummy tool initialization

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Date: Tue, 25 Jun 2024 10:25:59 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>, 
	Will Deacon <will@...nel.org>, James Clark <james.clark@....com>, 
	Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, 
	Suzuki K Poulose <suzuki.poulose@....com>, Yicong Yang <yangyicong@...ilicon.com>, 
	Jonathan Cameron <jonathan.cameron@...wei.com>, Nick Terrell <terrelln@...com>, 
	Nick Desaulniers <ndesaulniers@...gle.com>, Oliver Upton <oliver.upton@...ux.dev>, 
	Anshuman Khandual <anshuman.khandual@....com>, Song Liu <song@...nel.org>, 
	Ilkka Koskinen <ilkka@...amperecomputing.com>, Huacai Chen <chenhuacai@...nel.org>, 
	Yanteng Si <siyanteng@...ngson.cn>, Sun Haiyong <sunhaiyong@...ngson.cn>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v1 22/26] perf auxevent: Add explicit dummy tool initialization

Ensure tool is initialized to avoid lazy initialization pattern so
that more uses of struct perf_tool can be made const.

Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/arm-spe.c     | 1 +
 tools/perf/util/cs-etm.c      | 1 +
 tools/perf/util/intel-bts.c   | 1 +
 tools/perf/util/intel-pt.c    | 2 +-
 tools/perf/util/s390-cpumsf.c | 1 -
 5 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/arm-spe.c b/tools/perf/util/arm-spe.c
index 70bad18c4a0d..06a198b2f483 100644
--- a/tools/perf/util/arm-spe.c
+++ b/tools/perf/util/arm-spe.c
@@ -1097,6 +1097,7 @@ static int arm_spe_synth_event(struct perf_session *session,
 
 	memset(&arm_spe_synth, 0, sizeof(struct arm_spe_synth));
 	arm_spe_synth.session = session;
+	perf_tool__init(&arm_spe_synth.dummy_tool, /*ordered_events=*/false);
 
 	return perf_event__synthesize_attr(&arm_spe_synth.dummy_tool, attr, 1,
 					   &id, arm_spe_event_synth);
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 231cd833c012..02eb5b3eed14 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -1619,6 +1619,7 @@ static int cs_etm__synth_event(struct perf_session *session,
 
 	memset(&cs_etm_synth, 0, sizeof(struct cs_etm_synth));
 	cs_etm_synth.session = session;
+	perf_tool__init(&cs_etm_synth.dummy_tool, /*ordered_events=*/false);
 
 	return perf_event__synthesize_attr(&cs_etm_synth.dummy_tool, attr, 1,
 					   &id, cs_etm__event_synth);
diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c
index 779982c478e0..ae97109542be 100644
--- a/tools/perf/util/intel-bts.c
+++ b/tools/perf/util/intel-bts.c
@@ -761,6 +761,7 @@ static int intel_bts_synth_event(struct perf_session *session,
 
 	memset(&intel_bts_synth, 0, sizeof(struct intel_bts_synth));
 	intel_bts_synth.session = session;
+	perf_tool__init(&intel_bts_synth.dummy_tool, /*ordered_events=*/false);
 
 	return perf_event__synthesize_attr(&intel_bts_synth.dummy_tool, attr, 1,
 					   &id, intel_bts_event_synth);
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index bed35029e1f6..48ed60e521ed 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -3687,7 +3687,7 @@ static int intel_pt_synth_event(struct perf_session *session, const char *name,
 
 	memset(&intel_pt_synth, 0, sizeof(struct intel_pt_synth));
 	intel_pt_synth.session = session;
-
+	perf_tool__init(&intel_pt_synth.dummy_tool, /*ordered_events=*/false);
 	err = perf_event__synthesize_attr(&intel_pt_synth.dummy_tool, attr, 1,
 					  &id, intel_pt_event_synth);
 	if (err)
diff --git a/tools/perf/util/s390-cpumsf.c b/tools/perf/util/s390-cpumsf.c
index 5834bad6ac0f..eb835e531cd6 100644
--- a/tools/perf/util/s390-cpumsf.c
+++ b/tools/perf/util/s390-cpumsf.c
@@ -953,7 +953,6 @@ s390_cpumsf_process_event(struct perf_session *session,
 }
 
 struct s390_cpumsf_synth {
-	struct perf_tool cpumsf_tool;
 	struct perf_session *session;
 };
 
-- 
2.45.2.741.gdbec12cfda-goog