linux-kernel - Re: [PATCH] kernel/timer.c: using spin_lock_irqsave instead of spin_lock + local_irq_save, especially when CONFIG

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Message-ID: <51C1861A.6030901@asianux.com>
Date:	Wed, 19 Jun 2013 18:21:14 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.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

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
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