linux-kernel - Re: [PATCH 2/3] Makes all those related functions receive the FILE pointer

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Date:   Sat, 16 Sep 2017 09:23:32 -0600
From:   David Ahern <dsahern@...il.com>
To:     yuzhoujian <ufo19890607@...il.com>, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, namhyung@...nel.org, yuzhoujian@...ichuxing.com
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] Makes all those related functions receive the FILE
 pointer

On 9/13/17 9:10 AM, yuzhoujian wrote:
> @@ -1621,8 +1634,12 @@ static int process_comm_event(struct perf_tool *tool,
>  		sample->tid = event->comm.tid;
>  		sample->pid = event->comm.pid;
>  	}
> -	print_sample_start(sample, thread, evsel);
> -	perf_event__fprintf(event, stdout);
> +	if (tool->orientation_output == false)
> +		fp = stdout;
> +	else
> +		fp = orientation_file;
> +	fprint_sample_start(sample, thread, evsel, fp);
> +	perf_event__fprintf(event, fp);
>  	ret = 0;
>  out:
>  	thread__put(thread);

The subject of this patch is replacing printf and stdout with fprintf
and a given fp. Please keep it to that one change. Meaning the above
setting of fp something other than stdout should be a separate patch.

And it would be best to have the fp selection in a helper, versus the
same change in so many places.