linux-kernel - Re: [PATCH v7 1/6] perf annotate: Add cross arch annotate support

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Date:   Mon, 10 Oct 2016 18:56:06 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kim.phillips@....com,
        linuxppc-dev@...ts.ozlabs.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        treeze.taeung@...il.com, naveen.n.rao@...ux.vnet.ibm.com,
        markus@...ppelsdorf.de, namhyung@...nel.org, pawel.moll@....com,
        chris.ryder@....com, jolsa@...nel.org, mhiramat@...nel.org,
        Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Subject: Re: [PATCH v7 1/6] perf annotate: Add cross arch annotate support

Hi Arnaldo,

Sorry for little late replies, I was off last week.

Please find my comments.

On Wednesday 05 October 2016 04:49 PM, Arnaldo Carvalho de Melo wrote:
> Em Wed, Sep 21, 2016 at 09:17:51PM +0530, Ravi Bangoria escreveu:
>> Change current data structures and function to enable cross arch
>> annotate.
>>
>> Current perf implementation does not support cross arch annotate.
>> To make it truly cross arch, instruction table of all arch should
>> be present in perf binary. And use appropriate table based on arch
>> where perf.data was recorded.
...
>>  	tok = strchr(name, '>');
>>  	if (tok == NULL)
>> @@ -252,16 +253,12 @@ static int mov__parse(struct ins_operands *ops, struct map *map __maybe_unused)
>>  		return -1;
>>  
>>  	target = ++s;
>> -#ifdef __arm__
>> +
>>  	comment = strchr(s, ';');
>> -#else
>> -	comment = strchr(s, '#');
>> -#endif
>> +	if (comment == NULL)
>> +		comment = strchr(s, '#');
>>  
>> -	if (comment != NULL)
>> -		s = comment - 1;
>> -	else
>> -		s = strchr(s, '\0') - 1;
>> +	s = (comment != NULL) ? comment - 1 : strchr(s, '\0') - 1;
> Why have you touched the above 4 lines? The code you provided is
> equivalent, i.e. has no value for this patch you're working on, just a
> distraction for reviewers, please don't do that.

Sorry about that. I did this change to make code more compact but
yes, you are right, that should be done as separate patch.

-Ravi