linux-kernel - Re: [PATCH RFC tip/core/rcu 18/18] rcu: add primitives to check for RCU read-side critical sections

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Date:	Wed, 16 Dec 2009 11:31:34 +0100
From:	Peter Zijlstra <peterz@...radead.org>
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,
	rostedt@...dmis.org, Valdis.Kletnieks@...edu, dhowells@...hat.com
Subject: Re: [PATCH RFC tip/core/rcu 18/18] rcu: add primitives to check
 for RCU read-side critical sections

On Tue, 2009-12-15 at 15:02 -0800, Paul E. McKenney wrote:
> 
> Also create rcu_dereference_check(), which takes a second boolean argument
> into which one puts rcu_read_lock_held() or similar.  For example:
> 
>         rcu_dereference_check(gp, rcu_read_lock_held() ||
>                                   lockdep_is_held(my_lock));

Ah, so you're going to tackle this the other way around, interesting :-)

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