From: Andrey Borzenkov <arvidjaar@mail.ru>
To: Arjan van de Ven <arjan@infradead.org>,
Oliver Neukum <oliver@neukum.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: when spin_lock_irq (as opposed to spin_lock_irqsave) is appropriate?
Date: Sun, 12 Oct 2008 15:48:00 +0400 [thread overview]
Message-ID: <200810121548.05644.arvidjaar@mail.ru> (raw)
In-Reply-To: <20081011091806.2c8eb2d4@infradead.org>
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On Saturday 11 October 2008, Arjan van de Ven wrote:
[... very useful explanation omitted ...]
> Does this answer your question?
>
As Oliver pointed out, part of confusion wa my asumption that _irqsave
verion saves actual interrupt mask. It actually does not.
This leaves me with a question - how can I know whether interrupts may
(not) be disabled at particular point? In particular, is it safe to
assume that any place marked at "code may sleep" has interrupts enabled?
Thank you both!
-andrey
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next prev parent reply other threads:[~2008-10-12 11:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-11 15:29 when spin_lock_irq (as opposed to spin_lock_irqsave) is appropriate? Andrey Borzenkov
2008-10-11 15:41 ` Oliver Neukum
2008-10-11 15:55 ` Andrey Borzenkov
2008-10-12 8:08 ` Oliver Neukum
2008-10-11 16:18 ` Arjan van de Ven
2008-10-12 11:48 ` Andrey Borzenkov [this message]
2008-10-12 22:21 ` Arnd Bergmann
2008-10-12 23:12 ` Arjan van de Ven
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