From owner-freebsd-hackers@FreeBSD.ORG  Mon Jan 12 13:47:59 2009
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E39E3106566B
	for <freebsd-hackers@freebsd.org>; Mon, 12 Jan 2009 13:47:59 +0000 (UTC)
	(envelope-from bsd.quest@googlemail.com)
Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.156])
	by mx1.freebsd.org (Postfix) with ESMTP id 6F38A8FC1F
	for <freebsd-hackers@freebsd.org>; Mon, 12 Jan 2009 13:47:59 +0000 (UTC)
	(envelope-from bsd.quest@googlemail.com)
Received: by fg-out-1718.google.com with SMTP id l26so3684919fgb.35
	for <freebsd-hackers@freebsd.org>; Mon, 12 Jan 2009 05:47:58 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=googlemail.com; s=gamma;
	h=domainkey-signature:received:received:date:from:to:subject
	:message-id:reply-to:mail-followup-to:mime-version:content-type
	:content-disposition:user-agent;
	bh=eng03phmK/tRqJcEddTTPRBtZjQN0yodh+4eAJ8sxK8=;
	b=q9hAv+JFztoW0RIdGHSxvmwRZDW80Rq5zeSDYuZETDSOPk2EO4jb1xV/yN4t/aqTkN
	xWJoRiyXVzt6PxZRzNDxrtlfjAGkVXwlG65ObjTZmtE6iO1+gCWjTUy4vnZDMjO4ifar
	RFdo0oz0lBqkjIX7rA8gQSchoVxoAqUSZ/LX4=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma;
	h=date:from:to:subject:message-id:reply-to:mail-followup-to
	:mime-version:content-type:content-disposition:user-agent;
	b=CFdIXZX0kxNllP2JGc/2AVz+r3aoAb0q5tYYh9MPuD0faaE8LJGpbzNNenSPxU0T35
	fFRLlQhLkwVkvVzy4apyv8pNzcjyC6PFLvOgaFcYzcnvYx1rGYrA0pULZLYmxGulUwnG
	2U5DD5Nq7h29aRpYGjRyx5OrNHM2Vjmb6lijg=
Received: by 10.86.59.2 with SMTP id h2mr12373503fga.73.1231768078513;
	Mon, 12 Jan 2009 05:47:58 -0800 (PST)
Received: from localhost (BAJ0a25.baj.pppool.de [77.137.10.37])
	by mx.google.com with ESMTPS id 4sm43170469fgg.24.2009.01.12.05.47.56
	(version=TLSv1/SSLv3 cipher=RC4-MD5);
	Mon, 12 Jan 2009 05:47:57 -0800 (PST)
Date: Mon, 12 Jan 2009 14:47:26 +0100
From: Alexej Sokolov <bsd.quest@googlemail.com>
To: freebsd-hackers@freebsd.org
Message-ID: <20090112134726.GA2988@debian.samsung.router>
Mail-Followup-To: freebsd-hackers@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
User-Agent: Mutt/1.5.18 (2008-05-17)
Subject: panic by unlocking of mutex in KLD
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Alexej Sokolov <bsd.quest@googlemail.com>
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: Mon, 12 Jan 2009 13:48:00 -0000

Hello, 

by unloading of folowing module  I have kernel panic.

I would like to get any explanation about my mistake.

#include <sys/param.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/malloc.h>
#include <sys/types.h>
#include <sys/lock.h>
#include <sys/mutex.h>


struct mtx my_mtx; 


/* Load handler */
static int
load(struct module *mod, int cmd, void *arg)
{
        int error = 0; 
        switch(cmd) {
                case MOD_LOAD:
                        printf("Start! Addres of mutex = 0x%X \n",
&my_mtx);
                        mtx_init(&my_mtx, "My mutex name", "My mutex
type", MTX_DEF);

                        mtx_lock(&my_mtx);
                        break;
                case MOD_UNLOAD:
                        printf("Stop! Addres of mutex = 0x%X \n",
&my_mtx);
                        mtx_unlock(&my_mtx);
                        break;
                default:
                        error = EOPNOTSUPP;
                        break;
        }

        return (error);
}

/* Module structure */
static moduledata_t mod_data = {
        "mymod",
        load,
        NULL
};
MODULE_VERSION (kld, 1);
DECLARE_MODULE (kld, mod_data, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); 


Thanx

-- 
Alexej Sokolov <bsd.quest@googlemail.com>