DragonFlyBSD

diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c

index 53cf1bf..eec6025 100644

--- a/sys/kern/vfs_syscalls.c

+++ b/sys/kern/vfs_syscalls.c

@@ -663,11 +663,12 @@ dounmount(struct mount *mp, int flags)

 	int lflags;

 	int freeok = 1;

+	lwkt_gettoken(&mntvnode_token);

 	/*

 	 * Exclusive access for unmounting purposes

 	 */

 	if ((error = mountlist_interlock(dounmount_interlock, mp)) != 0)

-		return (error);

+		goto out;

 	/*

 	 * Allow filesystems to detect that a forced unmount is in progress.

@@ -680,7 +681,7 @@ dounmount(struct mount *mp, int flags)

 		mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);

 		if (mp->mnt_kern_flag & MNTK_MWAIT)

 			wakeup(mp);

-		return (error);

+		goto out;

 	}

 	if (mp->mnt_flag & MNT_EXPUBLIC)

@@ -768,7 +769,7 @@ dounmount(struct mount *mp, int flags)

 		lockmgr(&mp->mnt_lock, LK_RELEASE);

 		if (mp->mnt_kern_flag & MNTK_MWAIT)

 			wakeup(mp);

-		return (error);

+		goto out;

 	}

 	/*

 	 * Clean up any journals still associated with the mount after

@@ -810,7 +811,10 @@ dounmount(struct mount *mp, int flags)

 		wakeup(mp);

 	if (freeok)

 		kfree(mp, M_MOUNT);

-	return (0);

+	error = 0;

+out:

+	lwkt_reltoken(&mntvnode_token);

+	return (error);

 }

 static