linux-kernel - Re: [PATCH v13 02/14] perf, tools, jevents: Program to convert JSON file to C style file

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Date:	Wed, 3 Jun 2015 12:32:53 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	mingo@...hat.com, ak@...ux.intel.com,
	Michael Ellerman <mpe@...erman.id.au>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	namhyung@...nel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 02/14] perf, tools, jevents: Program to convert JSON
 file to C style file

On Tue, Jun 02, 2015 at 10:12:02AM -0700, Sukadev Bhattiprolu wrote:

SNIP

> +
> +static int process_mapfile(FILE *outfp, char *fpath)
> +{
> +	int n = 16384;
> +	FILE *mapfp;
> +	char *save;
> +	char *line, *p;
> +	int line_num;
> +	char *tblname;
> +
> +	pr_info("%s: Processing mapfile %s\n", prog, fpath);

SNIP

> +
> +		cpuid = strtok_r(p, ",", &save);
> +		version = strtok_r(NULL, ",", &save);
> +		fname = strtok_r(NULL, ",", &save);
> +		type = strtok_r(NULL, ",", &save);
> +
> +		tblname = file_name_to_table_name(fname);
> +		fprintf(outfp, "{\n");
> +		fprintf(outfp, "\t.cpuid = \"%s\",\n", cpuid);
> +		fprintf(outfp, "\t.version = \"%s\",\n", version);
> +		fprintf(outfp, "\t.type = \"%s\",\n", type);

got build failure for make DEBUG=1:

  CC       pmu-events/jevents.o
pmu-events/jevents.c: In function ‘process_mapfile’:
pmu-events/jevents.c:498:10: error: ‘save’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
   fprintf(outfp, "\t.type = \"%s\",\n", type);
          ^

jirka
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