perf tools: Use zfree() instead of ad hoc equivalent

We have zfree(&ptr) for this very common pattern:

   free(ptr);
   ptr = NULL;

So use it in a few more places.

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1485952447-7013-4-git-send-email-treeze.taeung@gmail.com
[ rewrote commit log ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 1f1f77d8d3ab..ab1ba22d879a 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -254,8 +254,7 @@ struct tracepoint_path *tracepoint_name_to_path(const char *name)
         if (path->system == NULL || path->name == NULL) {
                 zfree(&path->system);
                 zfree(&path->name);
-                free(path);
-                path = NULL;
+                zfree(&path);
         }
 
         return path;
@@ -1482,8 +1481,7 @@ static void perf_pmu__parse_cleanup(void)
                         p = perf_pmu_events_list + i;
                         free(p->symbol);
                 }
-                free(perf_pmu_events_list);
-                perf_pmu_events_list = NULL;
+                zfree(&perf_pmu_events_list);
                 perf_pmu_events_list_num = 0;
         }
 }