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Date: Wed, 10 Sep 2003 00:49:07 -0700
From: Andrew Morton <akpm@osdl.org>
To: Matt Mackall <mpm@selenic.com>
Cc: linux-kernel@vger.kernel.org, rjwalsh@durables.org
Subject: Re: [PATCH 1/3] netpoll api
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Matt Mackall <mpm@selenic.com> wrote:
>
> +	spin_lock_irq(&irq_desc[ndev->irq].lock);
>  +	for(a=irq_desc[ndev->irq].action; a; a=a->next) {

Lots of architectures do not use irq_desc[].   You'll need abstracted
per-arch primitives for functions such as this.