linux-kernel - Re: [PATCH 2/3] trace: provide correct return value after outputting the event.

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Date:	Tue, 10 Feb 2009 16:06:25 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Wenji Huang <wenji.huang@...cle.com>
Cc:	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 2/3] trace: provide correct return value after
	outputting the event.

On Tue, Feb 10, 2009 at 01:03:05AM -0500, Wenji Huang wrote:
> This patch is to make the function early return once failure and give
> correct return value in case of success.
> 
> Signed-off-by: Wenji Huang <wenji.huang@...cle.com>
> ---
>  kernel/trace/trace_functions_graph.c |   14 +++++++-------
>  1 files changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
> index 782ec0f..519a0ca 100644
> --- a/kernel/trace/trace_functions_graph.c
> +++ b/kernel/trace/trace_functions_graph.c
> @@ -186,30 +186,30 @@ verif_pid(struct trace_seq *s, pid_t pid, int cpu, pid_t *last_pids_cpu)
>  	ret = trace_seq_printf(s,
>  		" ------------------------------------------\n");
>  	if (!ret)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
>  	ret = print_graph_cpu(s, cpu);
>  	if (ret == TRACE_TYPE_PARTIAL_LINE)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
>  	ret = print_graph_proc(s, prev_pid);
>  	if (ret == TRACE_TYPE_PARTIAL_LINE)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
>  	ret = trace_seq_printf(s, " => ");
>  	if (!ret)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
>  	ret = print_graph_proc(s, pid);
>  	if (ret == TRACE_TYPE_PARTIAL_LINE)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
>  	ret = trace_seq_printf(s,
>  		"\n ------------------------------------------\n\n");
>  	if (!ret)
> -		TRACE_TYPE_PARTIAL_LINE;
> +		return TRACE_TYPE_PARTIAL_LINE;
>  
> -	return ret;
> +	return TRACE_TYPE_HANDLED;
>  }
>  
>  static struct ftrace_graph_ret_entry *
> -- 
> 1.5.6
> 

How could I have forgotten the return statements here...?

Anyway, the three patches look good.
Thanks!

Acked-by: Frederic Weisbecker <fweisbec@...il.com>

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