linux-kernel - Re: [PATCH tip/core/rcu 10/28] rcu: Fix RCU's NMI documentation

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Date:	Wed, 8 Jun 2011 19:19:01 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
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,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com, eric.dumazet@...il.com, darren@...art.com,
	patches@...aro.org
Subject: Re: [PATCH tip/core/rcu 10/28] rcu: Fix RCU's NMI documentation

* Paul E. McKenney (paulmck@...ux.vnet.ibm.com) wrote:
> It has long been the case that the architecture must call nmi_enter()
> and nmi_exit() rather than irq_enter() and irq_exit() in order to
> permit RCU read-side critical sections in NMIs.  Catch the documentation
> up with reality.
> 
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>

> ---
>  Documentation/RCU/NMI-RCU.txt |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/Documentation/RCU/NMI-RCU.txt b/Documentation/RCU/NMI-RCU.txt
> index a8536cb..84e4f9c 100644
> --- a/Documentation/RCU/NMI-RCU.txt
> +++ b/Documentation/RCU/NMI-RCU.txt
> @@ -95,7 +95,7 @@ not to return until all ongoing NMI handlers exit.  It is therefore safe
>  to free up the handler's data as soon as synchronize_sched() returns.
>  
>  Important note: for this to work, the architecture in question must
> -invoke irq_enter() and irq_exit() on NMI entry and exit, respectively.
> +invoke nmi_enter() and nmi_exit() on NMI entry and exit, respectively.
>  
>  
>  Answer to Quick Quiz
> -- 
> 1.7.3.2
> 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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