linux-kernel - Re: [PATCH 02/11] [BUGFIX] ftrace, kprobes: Fix a deadlock on ftrace_regex

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Date:	Thu, 09 May 2013 12:34:37 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	linux-kernel@...r.kernel.org,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	yrl.pp-manager.tt@...achi.com, Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Tom Zanussi <tom.zanussi@...el.com>
Subject: Re: [PATCH 02/11] [BUGFIX] ftrace, kprobes: Fix a deadlock on
 ftrace_regex_lock

On Thu, 2013-05-09 at 12:27 -0400, Steven Rostedt wrote:

> We probably should have a better way to initialize this. As there are 26
> ftrace_ops currently in the kernel (and this patch doesn't cover all of
> them). Maybe have the first time its registered to initialize it.

Crap, but it can be used before that. Hmm, I guess all ftrace functions
will need to check that flag first. We do something similar for rt_mutex
in -rt.

-- Steve



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