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authorArnaldo Carvalho de Melo <acme@redhat.com>2018-03-06 16:18:40 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-03-07 16:22:25 +0300
commitfc9ffb9cf085c78f49d4d1a602d723504c0d9c75 (patch)
treed123a1a52891cb9a9d44323e50e6168a508ef073 /tools/perf/util/cgroup.c
parenta53b646030ee6f65accdc49e772823b8134a37f6 (diff)
downloadlinux-fc9ffb9cf085c78f49d4d1a602d723504c0d9c75.tar.xz
perf cgroup: Introduce cgroup__get()
The refcount operation counterpart to cgroup__put(), use it when reusing a cgroup. 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-14ynvrl7y2cz8gyuy5q5v41g@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/cgroup.c')
-rw-r--r--tools/perf/util/cgroup.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index b078d54d4245..8ea964461eb7 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -99,15 +99,12 @@ static int add_cgroup(struct perf_evlist *evlist, char *str)
* check if cgrp is already defined, if so we reuse it
*/
evlist__for_each_entry(evlist, counter) {
- cgrp = counter->cgrp;
- if (!cgrp)
+ if (!counter->cgrp)
continue;
- if (!strcmp(cgrp->name, str)) {
- refcount_inc(&cgrp->refcnt);
+ if (!strcmp(counter->cgrp->name, str)) {
+ cgrp = cgroup__get(counter->cgrp);
break;
}
-
- cgrp = NULL;
}
if (!cgrp) {
@@ -157,6 +154,13 @@ void cgroup__put(struct cgroup *cgrp)
}
}
+struct cgroup *cgroup__get(struct cgroup *cgroup)
+{
+ if (cgroup)
+ refcount_inc(&cgroup->refcnt);
+ return cgroup;
+}
+
int parse_cgroups(const struct option *opt, const char *str,
int unset __maybe_unused)
{