linux-kernel - Re: [PATCH 06/13] function-graph: Allow writing the same val to set_graph

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Date:	Mon, 7 Dec 2009 15:43:15 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/13] function-graph: Allow writing the same val to 
	set_graph_function

2009/12/7 Li Zefan <lizf@...fujitsu.com>:
>  # echo 'do_open' > set_graph_function
>  # echo 'do_open' >> set_graph_function
>  bash: echo: write error: Invalid argument
>
> Make it valid to write the same value to set_graph_function,
> which is consistent with set_ftrace_filter interface.
>
> Signed-off-by: Li Zefan <lizf@...fujitsu.com>


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


> ---
>  kernel/trace/ftrace.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index ff8aecd..7968762 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -2552,10 +2552,9 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
>                                        exists = true;
>                                        break;
>                                }
> -                       if (!exists) {
> +                       if (!exists)
>                                array[(*idx)++] = rec->ip;
> -                               found = 1;
> -                       }
> +                       found = 1;
>                }
>        } while_for_each_ftrace_rec();
>
> --
> 1.6.3
>
>
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