From owner-freebsd-hackers@FreeBSD.ORG  Thu Jun  1 14:30:08 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 7507316BCCC
	for <freebsd-hackers@freebsd.org>; Thu,  1 Jun 2006 14:30:08 +0000 (UTC)
	(envelope-from fierykylin@gmail.com)
Received: from wx-out-0102.google.com (wx-out-0102.google.com [66.249.82.206])
	by mx1.FreeBSD.org (Postfix) with ESMTP id D0AAB43DA1
	for <freebsd-hackers@freebsd.org>; Thu,  1 Jun 2006 14:29:40 +0000 (GMT)
	(envelope-from fierykylin@gmail.com)
Received: by wx-out-0102.google.com with SMTP id i31so206328wxd
	for <freebsd-hackers@freebsd.org>; Thu, 01 Jun 2006 07:29:39 -0700 (PDT)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth;
	b=SqO9Z8ClhFw+GFJ83vEbld2ml9FTcVUtv5tffGuAtxT3Abgl6SD9AMQHztq6fnMJBaIrlJ3xxEEt9yVu+PkqnYS6hFlmi5eNttSj8C+QRBYNIHndCi/MR6Up0P/qZHMtJfwBm2In4F9z7uatn3SBMk7aBkJZfUbeQXCmL2/iWdg=
Received: by 10.70.19.5 with SMTP id 5mr803538wxs;
	Thu, 01 Jun 2006 07:29:39 -0700 (PDT)
Received: by 10.70.43.11 with HTTP; Thu, 1 Jun 2006 07:29:39 -0700 (PDT)
Message-ID: <87ab37ab0606010729o6435988cw6196345902a7e151@mail.gmail.com>
Date: Thu, 1 Jun 2006 22:29:39 +0800
From: "william wallace" <avalonwallace@gmail.com>
Sender: fierykylin@gmail.com
To: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <20060530.193050.-957834284.imp@bsdimp.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <87ab37ab0605300815k55358542y3110d4ee30cf8ba2@mail.gmail.com>
	<20060530094407.S93846@pooker.samsco.org>
	<87ab37ab0605301826j92e3f6gaed3ba75c039fe33@mail.gmail.com>
	<20060530.193050.-957834284.imp@bsdimp.com>
X-Google-Sender-Auth: 2fb9b5d89c941f51
Cc: freebsd-hackers@freebsd.org, scottl@samsco.org
Subject: Re: misc questions about the device&driver arch
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Jun 2006 14:30:08 -0000

Sir :
question one :
     I see lots' of use of pcib_get_bus  but i cannot see the
defination ,where is it ?

question two:
what is the relationship among  1device_delete_child
2devclass_delete_device and  3devclass_delete_driver
there seems some overlap among them :)
1devclass_delete_driver   ->device_detach->devclass_delete_device

2device_delete_child   -> device_detach

                             thank u!!

we who r about to die,salute u!