linux-kernel - Re: [PATCH 3/4] Add the fp_selection_helper function to set the file pointer for the related functions

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Date:   Fri, 22 Sep 2017 11:03:27 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     yuzhoujian <ufo19890607@...il.com>
Cc:     peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        dsahern@...il.com, namhyung@...nel.org, milian.wolff@...b.com,
        arnaldo.melo@...il.com, yuzhoujian@...ichuxing.com,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] Add the fp_selection_helper function to set the file
 pointer for the related functions

On Mon, Sep 18, 2017 at 01:55:21PM +0800, yuzhoujian wrote:
> Signed-off-by: yuzhoujian <yuzhoujian@...ichuxing.com>
> ---
>  tools/perf/builtin-script.c | 24 ++++++++++++++++--------
>  1 file changed, 16 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index f709f6f..89bab68 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -1527,6 +1527,13 @@ static int cleanup_scripting(void)
>  	return scripting_ops ? scripting_ops->stop_script() : 0;
>  }
>  
> +static FILE *fp_selection_helper(bool per_event_dump)
> +{
> +	if (per_event_dump == false)
> +		return stdout;
> +	else
> +		return per_event_dump_file;

when's the per_event_dump_file ever set? 

jirka