linux-kernel - Re: [PATCH v5 1/4] perf config: Introduce perf_config

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Date:	Mon, 4 Apr 2016 17:41:16 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Masami Hiramatsu <mhiramat@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v5 1/4] perf config: Introduce perf_config_set class

Hi, Masami Hiramatsu

On 04/04/2016 05:13 PM, Masami Hiramatsu wrote:
> Hi,
>
> 2016-04-03 2:08 GMT+09:00 Taeung Song <treeze.taeung@...il.com>:
> [...]
>> +static struct perf_config_section *add_section(struct list_head *sections,
>> +                                              const char *section_name)
>> +{
>> +       struct perf_config_section *section = zalloc(sizeof(*section));
>> +
>> +       if (!section)
>> +               return NULL;
>> +
>> +       INIT_LIST_HEAD(&section->items);
>> +       section->name = strdup(section_name);
>> +       if (!section->name) {
>> +               pr_debug("%s: strdup failed\n", __func__);
>> +               free(section);
>> +               return NULL;
>> +       }
>> +
>> +       list_add_tail(&section->node, sections);
>> +       return section;
>> +}
>> +
>> +static struct perf_config_item *add_config_item(struct perf_config_section *section,
>> +                                               const char *name)
>> +{
>> +       struct perf_config_item *item = zalloc(sizeof(*item));
>> +
>> +       if (!item)
>> +               return NULL;
>> +
>> +       item->name = strdup(name);
>> +       if (!item->name) {
>> +               pr_debug("%s: strdup failed\n", __func__);
>> +               goto out_err;
>
> As you did in above add_section(), you can do free(item)
> and return NULL here instead of using goto.
>
> Other parts looks OK for me.
>

I got it.
What you mean is like below ?

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index e636d09..53e756e 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -580,15 +580,12 @@ static struct perf_config_item 
*add_config_item(struct perf_config_section *sect
          item->name = strdup(name);
          if (!item->name) {
                  pr_debug("%s: strdup failed\n", __func__);
-                goto out_err;
+                free(item);
+                return NULL;
          }

          list_add_tail(&item->node, &section->items);
          return item;
-
-out_err:
-        free(item);
-        return NULL;
  }

  static int set_value(struct perf_config_item *item, const char *value)


I'll resend v6 with this.
Thank you for your review. :-)

Taeung