linux-kernel - Re: [PATCH linux-next] perf stat: remove redundant variable in arch_get_topdown_pmu

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Date:   Wed, 23 Nov 2022 15:33:55 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     zhang.songyi@....com.cn
Cc:     peterz@...radead.org, zhengjun.xing@...ux.intel.com,
        mingo@...hat.com, acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, kan.liang@...ux.intel.com,
        adrian.hunter@...el.com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH linux-next] perf stat: remove redundant variable in arch_get_topdown_pmu_name

On Wed, Nov 23, 2022 at 1:01 AM <zhang.songyi@....com.cn> wrote:
>
> From: zhang songyi <zhang.songyi@....com.cn>
>
> Return value from arch_get_topdown_pmu_name directly instead of taking
> this in another redundant variable.
>
> Signed-off-by: zhang songyi <zhang.songyi@....com.cn>

Acked-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  tools/perf/arch/x86/util/topdown.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/tools/perf/arch/x86/util/topdown.c b/tools/perf/arch/x86/util/topdown.c
> index 54810f9acd6f..5a5cdd6efe4d 100644
> --- a/tools/perf/arch/x86/util/topdown.c
> +++ b/tools/perf/arch/x86/util/topdown.c
> @@ -84,8 +84,6 @@ bool arch_topdown_sample_read(struct evsel *leader)
>
>  const char *arch_get_topdown_pmu_name(struct evlist *evlist, bool warn)
>  {
> -       const char *pmu_name;
> -
>         if (!perf_pmu__has_hybrid())
>                 return "cpu";
>
> @@ -95,9 +93,7 @@ const char *arch_get_topdown_pmu_name(struct evlist *evlist, bool warn)
>                 evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu("core");
>         }
>
> -       pmu_name = evlist->hybrid_pmu_name;
> -
> -       return pmu_name;
> +       return evlist->hybrid_pmu_name;
>  }
>
>  int topdown_parse_events(struct evlist *evlist)
> --
> 2.15.2