From owner-freebsd-hackers@FreeBSD.ORG  Sat May 20 07:37:08 2006
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Date: Sat, 20 May 2006 01:36:10 -0600 (MDT)
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To: avalonwallace@gmail.com
From: Warner Losh <imp@bsdimp.com>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: misc questions about the device&driver arch
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> does that mean that  whenever a new device or a new driver is add to
> the system ,a corresponding deviceclass will equally be created,
> am i right ,sir?

Yes.  That's right.

Warner