diff -urN FS-namespace_sem_removal/fs/Makefile FS-private_mount/fs/Makefile
--- FS-namespace_sem_removal/fs/Makefile	2005-10-21 19:06:41.000000000 -0400
+++ FS-private_mount/fs/Makefile	2005-11-03 06:59:21.000000000 -0500
@@ -10,7 +10,7 @@
 		ioctl.o readdir.o select.o fifo.o locks.o dcache.o inode.o \
 		attr.o bad_inode.o file.o filesystems.o namespace.o aio.o \
 		seq_file.o xattr.o libfs.o fs-writeback.o mpage.o direct-io.o \
-		ioprio.o
+		ioprio.o pnode.o
 
 obj-$(CONFIG_INOTIFY)		+= inotify.o
 obj-$(CONFIG_EPOLL)		+= eventpoll.o
diff -urN FS-namespace_sem_removal/fs/namespace.c FS-private_mount/fs/namespace.c
--- FS-namespace_sem_removal/fs/namespace.c	2005-11-03 06:59:20.000000000 -0500
+++ FS-private_mount/fs/namespace.c	2005-11-03 07:19:12.000000000 -0500
@@ -24,6 +24,7 @@
 #include <linux/mount.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
+#include "pnode.h"
 
 extern int __init init_rootfs(void);
 
@@ -663,6 +664,27 @@
 }
 
 /*
+ * recursively change the type of the mountpoint.
+ */
+static int do_change_type(struct nameidata *nd, int flag)
+{
+	struct vfsmount *m, *mnt = nd->mnt;
+	int recurse = flag & MS_REC;
+	int type = flag & ~MS_REC;
+
+	if (nd->dentry != nd->mnt->mnt_root)
+		return -EINVAL;
+
+	down_write(&namespace_sem);
+	spin_lock(&vfsmount_lock);
+	for (m = mnt; m; m = (recurse ? next_mnt(m, mnt) : NULL))
+		change_mnt_propagation(m, type);
+	spin_unlock(&vfsmount_lock);
+	up_write(&namespace_sem);
+	return 0;
+}
+
+/*
  * do loopback mount.
  */
 static int do_loopback(struct nameidata *nd, char *old_name, int recurse)
@@ -1091,6 +1113,8 @@
 				    data_page);
 	else if (flags & MS_BIND)
 		retval = do_loopback(&nd, dev_name, flags & MS_REC);
+	else if (flags & MS_PRIVATE)
+		retval = do_change_type(&nd, flags);
 	else if (flags & MS_MOVE)
 		retval = do_move_mount(&nd, dev_name);
 	else
diff -urN FS-namespace_sem_removal/fs/pnode.c FS-private_mount/fs/pnode.c
--- FS-namespace_sem_removal/fs/pnode.c	1969-12-31 19:00:00.000000000 -0500
+++ FS-private_mount/fs/pnode.c	2005-11-03 06:59:21.000000000 -0500
@@ -0,0 +1,17 @@
+/*
+ *  linux/fs/pnode.c
+ *
+ * (C) Copyright IBM Corporation 2005.
+ *	Released under GPL v2.
+ *	Author : Ram Pai (linuxram@us.ibm.com)
+ *
+ */
+#include <linux/namespace.h>
+#include <linux/mount.h>
+#include <linux/fs.h>
+#include "pnode.h"
+
+void change_mnt_propagation(struct vfsmount *mnt, int type)
+{
+	mnt->mnt_flags &= ~MNT_PNODE_MASK;
+}
diff -urN FS-namespace_sem_removal/fs/pnode.h FS-private_mount/fs/pnode.h
--- FS-namespace_sem_removal/fs/pnode.h	1969-12-31 19:00:00.000000000 -0500
+++ FS-private_mount/fs/pnode.h	2005-11-03 06:59:21.000000000 -0500
@@ -0,0 +1,14 @@
+/*
+ *  linux/fs/pnode.h
+ *
+ * (C) Copyright IBM Corporation 2005.
+ *	Released under GPL v2.
+ *
+ */
+#ifndef _LINUX_PNODE_H
+#define _LINUX_PNODE_H
+
+#include <linux/list.h>
+#include <linux/mount.h>
+void change_mnt_propagation(struct vfsmount *, int);
+#endif /* _LINUX_PNODE_H */
diff -urN FS-namespace_sem_removal/include/linux/fs.h FS-private_mount/include/linux/fs.h
--- FS-namespace_sem_removal/include/linux/fs.h	2005-10-30 23:05:47.000000000 -0500
+++ FS-private_mount/include/linux/fs.h	2005-11-03 06:59:21.000000000 -0500
@@ -104,6 +104,7 @@
 #define MS_MOVE		8192
 #define MS_REC		16384
 #define MS_VERBOSE	32768
+#define MS_PRIVATE	(1<<18)	/* change to private */
 #define MS_POSIXACL	(1<<16)	/* VFS does not apply the umask */
 #define MS_ACTIVE	(1<<30)
 #define MS_NOUSER	(1<<31)
diff -urN FS-namespace_sem_removal/include/linux/mount.h FS-private_mount/include/linux/mount.h
--- FS-namespace_sem_removal/include/linux/mount.h	2005-11-03 06:59:12.000000000 -0500
+++ FS-private_mount/include/linux/mount.h	2005-11-03 06:59:21.000000000 -0500
@@ -17,12 +17,12 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
-#define MNT_NOSUID	1
-#define MNT_NODEV	2
-#define MNT_NOEXEC	4
+#define MNT_NOSUID	0x01
+#define MNT_NODEV	0x02
+#define MNT_NOEXEC	0x04
+#define MNT_PNODE_MASK	0x30	/* propogation flag mask */
 
-struct vfsmount
-{
+struct vfsmount {
 	struct list_head mnt_hash;
 	struct vfsmount *mnt_parent;	/* fs we are mounted on */
 	struct dentry *mnt_mountpoint;	/* dentry of mountpoint */