linux-kernel - Re: [PATCH RFC 2/2] perf: convert: fix duplicate field names and avoid reserved keywords.

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Date:	Fri, 23 Jan 2015 09:44:17 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Wang Nan <wangnan0@...wei.com>
Cc:	jeremie.galarneau@...icios.com, rostedt@...dmis.org,
	bigeasy@...utronix.de, lizefan@...wei.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 2/2] perf: convert: fix duplicate field names and
 avoid reserved keywords.

On Fri, Jan 23, 2015 at 10:53:07AM +0800, Wang Nan wrote:

SNIP

> >> SNIP
> >>
> >>>  
> >>> +/* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
> >>> +static char *change_name(char *name, char *orig_name, int dup)
> >>> +{
> >>> +	char *new_name = NULL;
> >>> +	size_t len;
> >>> +
> >>> +	if (!name)
> >>> +		name = orig_name;
> >>> +
> >>> +	if (dup >= 10)
> >>> +		goto out;
> >>> +
> >>> +	if (dup < 0)
> >>> +		len = strlen(name) + sizeof("_");
> >>> +	else
> >>> +		len = strlen(orig_name) + sizeof("_dupl_X");
> >>
> >> if we allow for _dupl_10, should we use 'sizeof("_dupl_x")' ^^^ in here?
> >>
> 
> We don't allow _dupl_10. If dup is 10 or larger (see above two if clause), this function will
> return NULL.

ouch right.. ok ;-)

thanks,
jirka
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