linux-kernel - Re: [PATCH v7 3/6] perf/tools: Refactoring metricgroup__add

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Date:   Mon, 30 Mar 2020 21:36:20 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     acme@...nel.org, linuxppc-dev@...ts.ozlabs.org, mpe@...erman.id.au,
        sukadev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, anju@...ux.vnet.ibm.com,
        maddy@...ux.vnet.ibm.com, ravi.bangoria@...ux.ibm.com,
        peterz@...radead.org, yao.jin@...ux.intel.com, ak@...ux.intel.com,
        jolsa@...nel.org, kan.liang@...ux.intel.com, jmario@...hat.com,
        alexander.shishkin@...ux.intel.com, mingo@...nel.org,
        paulus@...abs.org, namhyung@...nel.org, mpetlan@...hat.com,
        gregkh@...uxfoundation.org, benh@...nel.crashing.org,
        mamatha4@...ux.vnet.ibm.com, mark.rutland@....com,
        tglx@...utronix.de
Subject: Re: [PATCH v7 3/6] perf/tools: Refactoring metricgroup__add_metric
 function

On Fri, Mar 27, 2020 at 03:55:25PM +0530, Kajol Jain wrote:
> This patch refactor metricgroup__add_metric function where
> some part of it move to function metricgroup__add_metric_param.
> No logic change.
> 
> Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>
> ---
>  tools/perf/util/metricgroup.c | 61 +++++++++++++++++++++--------------
>  1 file changed, 36 insertions(+), 25 deletions(-)
> 
> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> index 926449a7cdbf..b905eaa907a7 100644
> --- a/tools/perf/util/metricgroup.c
> +++ b/tools/perf/util/metricgroup.c
> @@ -485,6 +485,40 @@ static bool metricgroup__has_constraint(struct pmu_event *pe)
>  	return false;
>  }
>  
> +static int __metricgroup__add_metric(struct strbuf *events,
> +			struct list_head *group_list, struct pmu_event *pe)
> +{
> +
> +	const char **ids;
> +	int idnum;
> +	struct egroup *eg;
> +	int ret = -EINVAL;
> +
> +	if (expr__find_other(pe->metric_expr, NULL, &ids, &idnum) < 0)
> +		return ret;

no need for ret variable, return -EINVAL directly

jirka