From: Chen Gang <gang.chen@asianux.com>
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
Date: Wed, 19 Jun 2013 18:21:14 +0800 [thread overview]
Message-ID: <51C1861A.6030901@asianux.com> (raw)
In-Reply-To: <alpine.DEB.2.02.1306191151390.4013@ionos.tec.linutronix.de>
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
next prev parent reply other threads:[~2013-06-19 10:22 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-19 2:59 [PATCH] kernel/timer.c: using spin_lock_irqsave instead of spin_lock + local_irq_save, especially when CONFIG_LOCKDEP not defined Chen Gang
2013-06-19 8:41 ` Thomas Gleixner
2013-06-19 9:42 ` Chen Gang
2013-06-19 9:59 ` Thomas Gleixner
2013-06-19 10:07 ` Chen Gang
2013-06-19 10:49 ` Thomas Gleixner
2013-06-20 4:14 ` Chen Gang
2013-06-20 7:36 ` Thomas Gleixner
2013-06-20 8:42 ` Chen Gang
2013-06-20 9:02 ` Thomas Gleixner
2013-06-20 10:31 ` Chen Gang
2013-06-19 10:21 ` Chen Gang [this message]
2013-06-19 10:53 ` Thomas Gleixner
2013-06-20 8:37 ` Chen Gang
2013-06-20 9:07 ` Thomas Gleixner
2013-06-20 9:53 ` Chen Gang
2013-06-20 10:42 ` Thomas Gleixner
2013-06-20 10:59 ` Chen Gang
2013-06-20 9:12 ` Eric Dumazet
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