linux-kernel - Re: [PATCH tip/core/urgent 2/4] RCU: Better explain the condition parameter of rcu_dereference

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Date:	Fri, 09 Apr 2010 10:11:31 +0100
From:	David Howells <dhowells@...hat.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	dhowells@...hat.com, 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, eric.dumazet@...il.com
Subject: Re: [PATCH tip/core/urgent 2/4] RCU: Better explain the condition parameter of rcu_dereference_check()

Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> + *	bar = rcu_dereference_check(foo->bar, rcu_read_lock_held() ||
> + *					      lockdep_is_held(&foo->lock),
> + *					      atomic_read(&foo->usage) == 0);

As pointed out by Yong Zhang, the comma after lockdep_is_held() should be a
||.

David
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