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Date: Sat, 21 Apr 2001 11:08:31 +0200 (CEST)
From: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
cc: Dennis <dennis@etinc.com>, Matti Aarnio <matti.aarnio@zmailer.org>,
        linux-kernel@vger.kernel.org
Subject: Re: SMP in 2.4
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> > 	testb %al, intr_pending
> > 	jnz somewhere_away_to_handle_defered_interrupt
> > 
> > And - of course - interrupt checks intr_lock in its entry and if it is
> > zero, sets intr_pending and exits immediatelly.
> 
> And immediately gets called again. You have to mask the irq which is non trivial
> especially if you want to do it right on the BX. But you can do this and rtlinux
> does

There is already desc->handler->ack(irq) in do_IRQ which does that. Is any
more special handling needed? 

Mikulas

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