linux-kernel - Re: [PATCH 1/7] perf script: Do not call perf_event__preprocess

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Date:	Wed, 04 Dec 2013 16:09:52 +0200
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/7] perf script: Do not call perf_event__preprocess_sample()
 twice)

On 03/12/13 20:23, Arnaldo Carvalho de Melo wrote:
> Em Tue, Dec 03, 2013 at 09:23:04AM +0200, Adrian Hunter escreveu:
>> perf_event__preprocess_sample() is called in
>> process_sample_event().  Instead of calling it
>> again in perf_evsel__print_ip(), pass though
>> the resultant addr_location.
> 
> <SNIP>
>> +++ b/tools/perf/util/session.c
>> @@ -1487,11 +1487,12 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
>>  	return NULL;
>>  }
>>  
>> -void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
>> +void perf_evsel__print_ip(struct perf_evsel *evsel,
>> +			  union perf_event *event __maybe_unused,
> 
> Why do we have to keep this parameter?

You are right - it is not needed.

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