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Date: Wed, 19 Jun 2013 18:21:14 +0800
From: Chen Gang <gang.chen@asianux.com>
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To: Thomas Gleixner <tglx@linutronix.de>
CC: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] kernel/timer.c: using spin_lock_irqsave instead of spin_lock
 + local_irq_save, especially when CONFIG_LOCKDEP not defined
References: <51C11E83.8030902@asianux.com> <alpine.DEB.2.02.1306191029530.4013@ionos.tec.linutronix.de> <51C17D01.2060208@asianux.com> <alpine.DEB.2.02.1306191151390.4013@ionos.tec.linutronix.de>
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On 06/19/2013 05:59 PM, Thomas Gleixner wrote:
> I'm well aware how that works. And there is no difference whether you
> do:
> 
> 	local_irq_save(flags);
> 	spin_lock(&lock);
> or
> 	spin_lock_irqsave(&lock, flags);

if CONFIG_LOCKDEP is not defined, they are not semantically the same.


Thanks.
-- 
Chen Gang

Asianux Corporation