From:   Vladimir Isaev <Vladimir.Isaev@synopsys.com>
To:     Colin Ian King <colin.i.king@googlemail.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Vineet Gupta <vgupta@kernel.org>,
        "linux-perf-users@vger.kernel.org" <linux-perf-users@vger.kernel.org>,
        "linux-snps-arc@lists.infradead.org" 
        <linux-snps-arc@lists.infradead.org>
CC:     "kernel-janitors@vger.kernel.org" <kernel-janitors@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH] ARC: perf: Remove redundant initialization of variable
 idx
Thread-Topic: [PATCH] ARC: perf: Remove redundant initialization of variable
 idx
Thread-Index: AQHX4xQ6p9ujykx9JEuomtRQHb6dAawaSY2A
Date:   Mon, 29 Nov 2021 10:17:24 +0000
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References: <20211126222312.1125594-1-colin.i.king@gmail.com>
In-Reply-To: <20211126222312.1125594-1-colin.i.king@gmail.com>
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On 11/27/21 1:23 AM, Colin Ian King wrote:
>
> The variable idx is being initialized with a value that is never
> read, it is being updated later on. The assignment is redundant and
> can be removed.
>=20
> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
> ---
>  arch/arc/kernel/perf_event.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>=20
> diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
> index 145722f80c9b..f5dd799ddb9e 100644
> --- a/arch/arc/kernel/perf_event.c
> +++ b/arch/arc/kernel/perf_event.c
> @@ -361,7 +361,7 @@ static int arc_pmu_add(struct perf_event *event, int
> flags)
>  {
>  	struct arc_pmu_cpu *pmu_cpu =3D this_cpu_ptr(&arc_pmu_cpu);
>  	struct hw_perf_event *hwc =3D &event->hw;
> -	int idx =3D hwc->idx;
> +	int idx;
>=20
>  	idx =3D ffz(pmu_cpu->used_mask[0]);
>  	if (idx =3D=3D arc_pmu->n_counters)
> --
> 2.33.1
>=20

Acked-by: Vladimir Isaev <isaev@synopsys.com>

Thank you,
Vladimir Isaev