From owner-svn-src-stable@FreeBSD.ORG  Wed Apr 18 19:16:00 2012
Return-Path: <owner-svn-src-stable@FreeBSD.ORG>
Delivered-To: svn-src-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 8A1E9106566C;
	Wed, 18 Apr 2012 19:16:00 +0000 (UTC)
	(envelope-from ambrisko@FreeBSD.org)
Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c])
	by mx1.freebsd.org (Postfix) with ESMTP id 74B058FC17;
	Wed, 18 Apr 2012 19:16:00 +0000 (UTC)
Received: from svn.freebsd.org (localhost [127.0.0.1])
	by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q3IJG08v046884;
	Wed, 18 Apr 2012 19:16:00 GMT
	(envelope-from ambrisko@svn.freebsd.org)
Received: (from ambrisko@localhost)
	by svn.freebsd.org (8.14.4/8.14.4/Submit) id q3IJG0lV046882;
	Wed, 18 Apr 2012 19:16:00 GMT
	(envelope-from ambrisko@svn.freebsd.org)
Message-Id: <201204181916.q3IJG0lV046882@svn.freebsd.org>
From: Doug Ambrisko <ambrisko@FreeBSD.org>
Date: Wed, 18 Apr 2012 19:16:00 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
	svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org
X-SVN-Group: stable-9
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: 
Subject: svn commit: r234438 - stable/9/sys/kern
X-BeenThere: svn-src-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: SVN commit messages for all the -stable branches of the src tree
	<svn-src-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable>, 
	<mailto:svn-src-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-stable>
List-Post: <mailto:svn-src-stable@freebsd.org>
List-Help: <mailto:svn-src-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/svn-src-stable>,
	<mailto:svn-src-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 18 Apr 2012 19:16:00 -0000

Author: ambrisko
Date: Wed Apr 18 19:15:59 2012
New Revision: 234438
URL: http://svn.freebsd.org/changeset/base/234438

Log:
  MFC r230778
  When detaching an AIO or LIO requests grab the lock and tell knlist_remove
  that we have the lock now.  This cleans up a locking panic ASSERT when
  knlist_empty is called without a lock when INVARIANTS etc. are turned.

Modified:
  stable/9/sys/kern/vfs_aio.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/vfs_aio.c
==============================================================================
--- stable/9/sys/kern/vfs_aio.c	Wed Apr 18 19:11:21 2012	(r234437)
+++ stable/9/sys/kern/vfs_aio.c	Wed Apr 18 19:15:59 2012	(r234438)
@@ -2535,10 +2535,13 @@ filt_aioattach(struct knote *kn)
 static void
 filt_aiodetach(struct knote *kn)
 {
-	struct aiocblist *aiocbe = kn->kn_ptr.p_aio;
+	struct knlist *knl;
 
-	if (!knlist_empty(&aiocbe->klist))
-		knlist_remove(&aiocbe->klist, kn, 0);
+	knl = &kn->kn_ptr.p_aio->klist;
+	knl->kl_lock(knl->kl_lockarg);
+	if (!knlist_empty(knl))
+		knlist_remove(knl, kn, 1);
+	knl->kl_unlock(knl->kl_lockarg);
 }
 
 /* kqueue filter function */
@@ -2580,10 +2583,13 @@ filt_lioattach(struct knote *kn)
 static void
 filt_liodetach(struct knote *kn)
 {
-	struct aioliojob * lj = kn->kn_ptr.p_lio;
+	struct knlist *knl;
 
-	if (!knlist_empty(&lj->klist))
-		knlist_remove(&lj->klist, kn, 0);
+	knl = &kn->kn_ptr.p_lio->klist;
+	knl->kl_lock(knl->kl_lockarg);
+	if (!knlist_empty(knl))
+		knlist_remove(knl, kn, 1);
+	knl->kl_unlock(knl->kl_lockarg);
 }
 
 /* kqueue filter function */