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Date: Wed, 4 Dec 2002 17:08:55 +0100 (CET)
From: "davide.rossetti" <Davide.Rossetti@roma1.infn.it>
Reply-To: davide.rossetti@roma1.infn.it
To: Madhavi <madhavis@sasken.com>
cc: linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: in_irq()
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On Tue, 3 Dec 2002, Madhavi wrote:

> 
> Hi
> 
> I am using a UP system with CONFIG_SMP=y in .config with linux 2.4.19
> kernel.
> 
> I have this piece of code:
> 
> 	spin_lock_irqsave(&some_lock, flags);
> 	in_irq();
> 	spin_unlock_irqrestore(&some_lock, flags);
> 
> I have read somewhere (I think its given in the Unreliable Guide to
> kernel locking) that in_irq() returns true when the interrupts
> are blocked. So, I was expecting in_irq() to return true here. But, it is
> returning 0 here.

I think it is intended to return true only if you are in an interrupt 
context.... that is in the context of a iterrupt handler...

ciao


-- 
______/ Rossetti Davide   INFN - Roma I - APE group \______________
 pho +390649914507/412   web: http://apegate.roma1.infn.it/~rossetti
 fax +390649914423     email: davide.rossetti@roma1.infn.it        


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