linux-kernel - Re: [PATCH] ftrace: perform an initialization for ftrace to enable it

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Message-ID: <20081028181614.GB11275@elte.hu>
Date:	Tue, 28 Oct 2008 19:16:14 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ftrace: perform an initialization for ftrace to enable
	it


* Frederic Weisbecker <fweisbec@...il.com> wrote:

> Impact: Corrects a bug which made the function tracer not functionnal
> 
> With latest git, the function tracer didn't get any trace. The 
> problem was the fact that ftrace_enabled wasn't initialized to 1 
> because ftrace hasn't any init function when DYNAMIC_FTRACE is 
> disabled. So when a tracer tries to register an ftrace_ops struct, 
> __register_ftrace_function failed to set the hook.
> 
> This patch corrects it by setting an init function to initialize 
> ftrace during the boot.
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>

applied to tip/tracing/urgent, thanks Frederic!

	Ingo
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