linux-kernel - [RFC PATCH v1 18/37] perf evsel: add evsel__prepare

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Date:   Sat, 21 Aug 2021 11:19:24 +0200
From:   Riccardo Mancini <rickyman7@...il.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org,
        Riccardo Mancini <rickyman7@...il.com>
Subject: [RFC PATCH v1 18/37] perf evsel: add evsel__prepare_open function

This function will prepare the evsel and disable the missing features.
It will be used in one of the following patches.

Signed-off-by: Riccardo Mancini <rickyman7@...il.com>
---
 tools/perf/util/evsel.c | 14 ++++++++++++++
 tools/perf/util/evsel.h |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f0bc89f743915800..4e9a3e62075305f1 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1827,6 +1827,20 @@ static void evsel__disable_missing_features(struct evsel *evsel)
 		evsel->core.attr.sample_id_all = 0;
 }
 
+int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
+		struct perf_thread_map *threads)
+{
+	int err;
+
+	err = __evsel__prepare_open(evsel, cpus, threads);
+	if (err)
+		return err;
+
+	evsel__disable_missing_features(evsel);
+
+	return err;
+}
+
 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
 		struct perf_thread_map *threads,
 		int start_cpu, int end_cpu)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 1c0057e80d080f2f..58aa998e1814ac9e 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -286,6 +286,8 @@ int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
 		struct perf_thread_map *threads);
 void evsel__close(struct evsel *evsel);
+int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
+		struct perf_thread_map *threads);
 
 struct perf_sample;
 
-- 
2.31.1