linux-kernel - [PATCH 04/54] perf cgroup: Rename close_cgroup() to cgroup_

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Date:   Thu,  8 Mar 2018 16:49:39 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Wang Nan <wangnan0@...wei.com>
Subject: [PATCH 04/54] perf cgroup: Rename close_cgroup() to cgroup__put()

From: Arnaldo Carvalho de Melo <acme@...hat.com>

It is not really closing the cgroup, but instead dropping a reference
count and if it hits zero, then calling delete, which will, among other
cleanup shores, close the cgroup fd.

So it is really dropping a reference to that cgroup, and the method name
for that is "put", so rename close_cgroup() to cgroup__put() to follow
this naming convention.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-sccxpnd7bgwc1llgokt6fcey@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/cgroup.c | 5 ++---
 tools/perf/util/cgroup.h | 3 ++-
 tools/perf/util/evsel.c  | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 4dd52feb1ae6..b078d54d4245 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -135,9 +135,8 @@ static int add_cgroup(struct perf_evlist *evlist, char *str)
 			goto found;
 		n++;
 	}
-	if (refcount_dec_and_test(&cgrp->refcnt))
-		free(cgrp);
 
+	cgroup__put(cgrp);
 	return -1;
 found:
 	counter->cgrp = cgrp;
@@ -151,7 +150,7 @@ static void cgroup__delete(struct cgroup *cgroup)
 	free(cgroup);
 }
 
-void close_cgroup(struct cgroup *cgrp)
+void cgroup__put(struct cgroup *cgrp)
 {
 	if (cgrp && refcount_dec_and_test(&cgrp->refcnt)) {
 		cgroup__delete(cgrp);
diff --git a/tools/perf/util/cgroup.h b/tools/perf/util/cgroup.h
index 934daa8e4c19..69169fbf8d13 100644
--- a/tools/perf/util/cgroup.h
+++ b/tools/perf/util/cgroup.h
@@ -14,7 +14,8 @@ struct cgroup {
 
 
 extern int nr_cgroups; /* number of explicit cgroups defined */
-void close_cgroup(struct cgroup *cgrp);
+
+void cgroup__put(struct cgroup *cgroup);
 
 int parse_cgroups(const struct option *opt, const char *str, int unset);
 
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index b56e1c2ddaee..f1f883bb41a8 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1233,7 +1233,7 @@ void perf_evsel__exit(struct perf_evsel *evsel)
 	perf_evsel__free_fd(evsel);
 	perf_evsel__free_id(evsel);
 	perf_evsel__free_config_terms(evsel);
-	close_cgroup(evsel->cgrp);
+	cgroup__put(evsel->cgrp);
 	cpu_map__put(evsel->cpus);
 	cpu_map__put(evsel->own_cpus);
 	thread_map__put(evsel->threads);
-- 
2.14.3