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Subject: Re: [PATCH v2] dynamic_debug: add wildcard support to filter
 files/functions/modules
From: Joe Perches <joe@perches.com>
To: Changbin Du <changbin.du@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Jason Baron <jbaron@akamai.com>,
        "linux-kernel@vger.kernel.org list" <linux-kernel@vger.kernel.org>
Date: Wed, 06 Nov 2013 22:12:43 -0800
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On Thu, 2013-11-07 at 11:11 +0800, Changbin Du wrote:
> 2013/11/1 Joe Perches <joe@perches.com>:
> > On Thu, 2013-10-31 at 15:52 -0700, Andrew Morton wrote:
> >> On Mon, 28 Oct 2013 23:29:10 +0800 "Du, Changbin" <changbin.du@gmail.com> wrote:
> > []
> >> > +/* check if the string matches given pattern which includes wildcards */
> >> > +static int match_pattern(const char *pattern, const char *string)
> > []
> >> No, something like this should be in lib/ so that other callers can use
> >> it.  We already have at least one copy handy in
> >> drivers/ata/libata-core.c:glob_match().  A better approach would be to
> >> move that glob_match() into lib/glob_match.c then teach dynamic_debug
> >> to use it.
> >>
> >> There are probably other private globbing functions lying around the
> >> kernel, but it's rather a hard thing to grep for...
> >
> > Maybe use lib/parser.c where the other match_<foo> functions
> > are already.
> 
> match_<foo> functions in lib/parser.c just do simple match, they
> doesn't support wildcards.
> So it's not useful for us.

It's not meant to be useful so much as be a possible
generic location for your match_regex function.