linux-kernel - Re: [PATCH tip/core/rcu 3/3] rcu, ftrace: fix RCU lockdep splat in ftrace_perf_buf

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Date:	Thu, 4 Mar 2010 04:55:36 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH tip/core/rcu 3/3] rcu, ftrace: fix RCU lockdep splat in
	ftrace_perf_buf_prepare()

On Wed, Mar 03, 2010 at 05:50:18PM -0800, Paul E. McKenney wrote:
> Change the pair of rcu_dereference() calls in ftrace_perf_buf_prepare()
> to rcu_dereference_sched().
> 
> Cc: Steven Rostedt <rostedt@...dmis.org>


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

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