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From: Scott Long <scottl@samsco.org>
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Date: Sat, 3 Oct 2009 09:05:35 -0600
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To: Hans Petter Selasky <hselasky@c2i.net>
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Cc: freebsd-current@freebsd.org
Subject: Re: [PATCH] Fix for USB media not found at boot
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On Oct 3, 2009, at 4:30 AM, Hans Petter Selasky wrote:
> On Saturday 03 October 2009 10:19:57 Scott Long wrote:
>> config_intrhook system will sleep after all
>
> Then why do you need the intr hook callback?
>

The config_intrhook lets you know that interrupts are enabled, the  
scheduler is running, and mountroot hasn't run yet.  It provides a  
very convenient and standard way to do exactly what we want with USB  
enumeration.

Scott