linux-kernel - Re: [PATCH] riscv: perf_event: Remove redundant initialization of variable ret

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Date:   Sat, 27 Nov 2021 11:21:28 -0800
From:   Atish Patra <atishp@...shpatra.org>
To:     colin.i.king@...glemail.com
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-perf-users@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        kernel-janitors@...r.kernel.org,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] riscv: perf_event: Remove redundant initialization of
 variable ret

On Fri, Nov 26, 2021 at 2:31 PM Colin Ian King
<colin.i.king@...glemail.com> wrote:
>
> The variable ret is being initialized with a value that is never
> read, it is being updated later on. The assignment is redundant and
> can be removed. Clean up the incorrectly indented following
> declaration of variable code and move to the same line as the
> declaration of variable ret.
>
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>
> ---
>  arch/riscv/kernel/perf_event.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>

This file will be removed in favor of a platform driver that has more
rich support for perf.
https://lkml.org/lkml/2021/10/25/1427

> diff --git a/arch/riscv/kernel/perf_event.c b/arch/riscv/kernel/perf_event.c
> index c835f0362d94..cf3e2ac9bbb2 100644
> --- a/arch/riscv/kernel/perf_event.c
> +++ b/arch/riscv/kernel/perf_event.c
> @@ -156,8 +156,7 @@ static int riscv_map_cache_decode(u64 config, unsigned int *type,
>  static int riscv_map_cache_event(u64 config)
>  {
>         unsigned int type, op, result;
> -       int err = -ENOENT;
> -               int code;
> +       int err, code;
>
>         err = riscv_map_cache_decode(config, &type, &op, &result);
>         if (!riscv_pmu->cache_events || err)
> --
> 2.33.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

-- 
Regards,
Atish

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