linux-kernel - Re: [PATCH] tracing: prevent build warning: 'ftrace_graph

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Message-ID: <20091105063917.GA4896@nowhere>
Date:	Thu, 5 Nov 2009 07:39:19 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing: prevent build warning: 'ftrace_graph_buf'
	defined but not used

On Thu, Nov 05, 2009 at 11:16:17AM +0800, Lai Jiangshan wrote:
> 
> prevent build warning when !CONFIG_FUNCTION_GRAPH_TRACER
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>


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



> ---
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 7cb6f19..892e3ea 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -2274,7 +2274,6 @@ void ftrace_set_notrace(unsigned char *buf, int len, int reset)
>  #define FTRACE_FILTER_SIZE		COMMAND_LINE_SIZE
>  static char ftrace_notrace_buf[FTRACE_FILTER_SIZE] __initdata;
>  static char ftrace_filter_buf[FTRACE_FILTER_SIZE] __initdata;
> -static char ftrace_graph_buf[FTRACE_FILTER_SIZE] __initdata;
>  
>  static int __init set_ftrace_notrace(char *str)
>  {
> @@ -2291,6 +2290,7 @@ static int __init set_ftrace_filter(char *str)
>  __setup("ftrace_filter=", set_ftrace_filter);
>  
>  #ifdef CONFIG_FUNCTION_GRAPH_TRACER
> +static char ftrace_graph_buf[FTRACE_FILTER_SIZE] __initdata;
>  static int __init set_graph_function(char *str)
>  {
>  	strlcpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);
> 

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