perf cgroup: Rename close_cgroup() to cgroup__put()

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@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-sccxpnd7bgwc1llgokt6fcey@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index 4dd52fe..b078d54 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -135,9 +135,8 @@
 			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 @@
 	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);