linux-kernel - Re: [PATCH 1/5] perf tools: Factor ui_browser ops out of ui

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Date:	Fri, 20 Jun 2014 08:33:52 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 1/5] perf tools: Factor ui_browser ops out of ui_browser struct

Hi Jiri,

On Thu, 19 Jun 2014 18:49:21 +0200, Jiri Olsa wrote:
> On Thu, Jun 19, 2014 at 12:38:51PM -0300, Arnaldo Carvalho de Melo wrote:
>> Em Thu, Jun 19, 2014 at 01:41:12PM +0200, Jiri Olsa escreveu:
>> > Separating ops out of 'struct ui_browser' into
>> > 'struct ui_browser_ops'.
>> 
>> You stated what you did, and that helps in understanding what this patch
>> is about, now we only need to have a paragraph on _why_ this is needed
>> :-)
>
> well.. it's not ;-) but we always separated ops from the
> structs IIRC
>
> I introduced another callback in the early stage of this change,
> but replaced it later.. this remained ;-)
>
> no need to take it.. as I wrote in patch 0:
>
> Patches 1 and 2 are not necessary for the functionality,
> they are just byproducts of another early way I tried,
> but I think they could go in.

Hmm.. I think it should make the ops const, otherwise it makes only a
little sense.


[SNIP]
>> > +static bool ui_browser__filter(struct ui_browser *browser, void *entry)
>> > +{
>> > +	return browser->ops.filter ? browser->ops.filter(browser, entry) :
>> > +				     false;
>> > +}
>> > +
>> >  static struct list_head *
>> >  ui_browser__list_head_filter_entries(struct ui_browser *browser,
>> >  				     struct list_head *pos)
>> >  {
>> >  	do {
>> > -		if (!browser->filter || !browser->filter(browser, pos))
>> > +		if (!ui_browser__filter(browser, pos))

Looks like this can be a separate cleanup.

Thanks,
Namhyung


>> >  			return pos;
>> >  		pos = pos->next;
>> >  	} while (pos != browser->entries);
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