linux-kernel - Re: [PATCH] perf tools: report initial event parsing error

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Date:   Mon, 11 Nov 2019 13:02:20 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.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>,
        Namhyung Kim <namhyung@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Thomas Richter <tmricht@...ux.ibm.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        Allison Randal <allison@...utok.net>,
        Davidlohr Bueso <dave@...olabs.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] perf tools: report initial event parsing error

On Fri, Nov 08, 2019 at 10:15:33AM -0800, Ian Rogers wrote:

SNIP

> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 43c05eae1768..46a72ecac427 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -3016,11 +3016,18 @@ static bool evlist__add_vfs_getname(struct evlist *evlist)
>  {
>  	bool found = false;
>  	struct evsel *evsel, *tmp;
> -	struct parse_events_error err = { .idx = 0, };
> -	int ret = parse_events(evlist, "probe:vfs_getname*", &err);
> +	struct parse_events_error err;
> +	int ret;
>  
> -	if (ret)
> +	bzero(&err, sizeof(err));

hum, what's the problem with the zero init above?

jirka