Message-ID: <20021007124121.37417.qmail@web12407.mail.yahoo.com>
Date: Mon, 7 Oct 2002 05:41:21 -0700 (PDT)
From: Amol Lad <dal_loma@yahoo.com>
Subject: wake_up from interrupt handler
To: linux-kernel@vger.kernel.org
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,
 I have a kernel thread which did add_to_wait_queue()
to wait for an event. 
The event for which above thread is waiting occurs in
an interrupt handler that calls wake_up() to wake the
above thread. 
Now I am faced with a 'lost wakeup' problem, in which
the    
kernel thread checks whether event occured, he finds
it to be 'not-occured' but before calling
add_to_wait_queue(), interrupt handler detects that
the event has occured and calls wake_up().
My thread sleeps forever.

I know some new APIs are provided in recent 2.5
kernel, but how to avoid this in 2.4.18

please CC me 

Thanks
Amol


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