netdev - [PATCH perf/core 3/5] perf tools: Move libbpf init in libbpf

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Message-Id: <20220422100025.1469207-4-jolsa@kernel.org>
Date:   Fri, 22 Apr 2022 12:00:23 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     linux-perf-users@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH perf/core 3/5] perf tools: Move libbpf init in libbpf_init function

Moving the libbpf init code into single function,
so we have single place doing that.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/bpf-loader.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index b72cef1ae959..f8ad581ea247 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -99,16 +99,26 @@ static int bpf_perf_object__add(struct bpf_object *obj)
 	return perf_obj ? 0 : -ENOMEM;
 }
 
+static int libbpf_init(void)
+{
+	if (libbpf_initialized)
+		return 0;
+
+	libbpf_set_print(libbpf_perf_print);
+	libbpf_initialized = true;
+	return 0;
+}
+
 struct bpf_object *
 bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz, const char *name)
 {
 	LIBBPF_OPTS(bpf_object_open_opts, opts, .object_name = name);
 	struct bpf_object *obj;
+	int err;
 
-	if (!libbpf_initialized) {
-		libbpf_set_print(libbpf_perf_print);
-		libbpf_initialized = true;
-	}
+	err = libbpf_init();
+	if (err)
+		return ERR_PTR(err);
 
 	obj = bpf_object__open_mem(obj_buf, obj_buf_sz, &opts);
 	if (IS_ERR_OR_NULL(obj)) {
@@ -135,14 +145,13 @@ struct bpf_object *bpf__prepare_load(const char *filename, bool source)
 {
 	LIBBPF_OPTS(bpf_object_open_opts, opts, .object_name = filename);
 	struct bpf_object *obj;
+	int err;
 
-	if (!libbpf_initialized) {
-		libbpf_set_print(libbpf_perf_print);
-		libbpf_initialized = true;
-	}
+	err = libbpf_init();
+	if (err)
+		return ERR_PTR(err);
 
 	if (source) {
-		int err;
 		void *obj_buf;
 		size_t obj_buf_sz;
 
-- 
2.35.1