netdev - Re: [PATCH] netpoll: use non-BH variant of RCU

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Date:	Fri, 03 Sep 2010 08:34:09 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	paulmck@...ux.vnet.ibm.com
Cc:	herbert@...dor.apana.org.au, linville@...driver.com,
	netdev@...r.kernel.org, mingo@...e.hu,
	linux-kernel@...r.kernel.org, peterz@...radead.org
Subject: Re: [PATCH] netpoll: use non-BH variant of RCU

From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Date: Thu, 2 Sep 2010 10:26:25 -0700

>     softirq: adjust error check
>     
>     The error check for _local_bh_enable_ip() warns on both in_irq() and
>     irqs_disabled().  The check for in_irq() is necessary, because a hardirq
>     might well have interrupted bh execution, in which case it is simply
>     not possible for the hardirq to exclude the bh that got interrupted.
>     
>     However, it is perfectly reasonable to disable bh while hardirqs are
>     disabled, and this in fact promotes common code.  This commit therefore
>     removes the irqs_disabled() check.
>     
>     Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Acked-by: David S. Miller <davem@...emloft.net>
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