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

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Message-ID: <20200330193644.GF2490231@krava>
Date:   Mon, 30 Mar 2020 21:36:44 +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:

SNIP

> +	eg->ids = ids;
> +	eg->idnum = idnum;
> +	eg->metric_name = pe->metric_name;
> +	eg->metric_expr = pe->metric_expr;
> +	eg->metric_unit = pe->unit;
> +	list_add_tail(&eg->nd, group_list);
> +
> +	return 0;
> +}
> +
>  static int metricgroup__add_metric(const char *metric, struct strbuf *events,
>  				   struct list_head *group_list)
>  {
> @@ -504,35 +538,12 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
>  			continue;
>  		if (match_metric(pe->metric_group, metric) ||
>  		    match_metric(pe->metric_name, metric)) {
> -			const char **ids;
> -			int idnum;
> -			struct egroup *eg;
>  
>  			pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
>  
> -			if (expr__find_other(pe->metric_expr,
> -					     NULL, &ids, &idnum) < 0)
> +			ret = __metricgroup__add_metric(events,	group_list, pe);
> +			if (ret == -EINVAL || !ret)
>  				continue;

what's the point of continue in here? it's end of the loop..

jirka