From: Zhang Le <robert@thizgroup.com>
To: liyu <liyu@ccoss.com.cn>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [Question] I doublt on spin_lock again.
Date: Wed, 23 Nov 2005 12:09:12 +0800 [thread overview]
Message-ID: <4383EB68.1040604@thizgroup.com> (raw)
In-Reply-To: <4383DA6B.400@ccoss.com.cn>
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liyu wrote:
| 1. I know local_irq_save() in task_rq_lock(), but it only save
| FLAGS register to one unsigned long variable, but not disable
| maskable interrupt.
#define local_irq_save(x) __asm__ __volatile__("pushfl ; popl %0 ;
cli":"=g" (x): /* no
~ input */ :"memory")
- --
Zhang Le, Robert
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ThizLinux Laboratory Limited
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prev parent reply other threads:[~2005-11-23 4:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-23 2:04 [Question] I doublt on spin_lock again liyu
2005-11-23 2:51 ` Zhang Le
2005-11-23 2:56 ` liyu
2005-11-23 4:09 ` Zhang Le [this message]
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