linux-kernel - Re: [PATCH tip/core/rcu 2/4] rcu: suppress RCU lockdep warnings during early boot

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Date:	Thu, 4 Mar 2010 12:12:45 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, 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
Subject: Re: [PATCH tip/core/rcu 2/4] rcu: suppress RCU lockdep warnings
 during early boot


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

> @@ -154,6 +167,10 @@ static inline int rcu_read_lock_sched_held(void)
>  # define rcu_read_acquire_sched()	do { } while (0)
>  # define rcu_read_release_sched()	do { } while (0)
>  
> +static inline void debug_lockdep_rcu_update(void)
> +{
> +}
> +

Note, this method was only included for the !CONFIG_DEBUG_LOCK_ALLOC case, so 
i left it out for the time being.

Which may result in a somewhat incomplete debug state, but it would at least 
build with lockdep enabled ;-)

	Ingo
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