linux-kernel - Re: [PATCH 4/5 v2] tracing/filters: Provide basic regex support

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Date:	Fri, 25 Sep 2009 10:16:17 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Tom Zanussi <tzanussi@...il.com>,
	Li Zefan <lizf@...fujitsu.com>
Subject: Re: [PATCH 4/5 v2] tracing/filters: Provide basic regex support

On Fri, Sep 25, 2009 at 12:13:45PM +0400, Andrey Panin wrote:
> On 267, 09 24, 2009 at 09:49:34PM +0200, Frederic Weisbecker wrote:
> > This patch provides basic support for regular expressions in filters.
> 
> > +/* Basic regex callbacks */
> > +static int regex_match_full(char *str, struct regex *r, int len)
> > +{
> > +	if (strncmp(str, r->pattern, len) == 0)
> > +		return 1;
> > +	return 0;
> > +}
> > +
> > +static int regex_match_front(char *str, struct regex *r, int len)
> > +{
> > +	if (strncmp(str, r->pattern, len) == 0)
> > +		return 1;
> > +	return 0;
> > +}
> 
> These two functions are identical, what's the reason to keep them separate ?
> And why not simply return strncmp(str, r->pattern, len) == 0 ?


Good catch! I'll fix that, thanks.

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