diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 64815b7..ca9a4aa 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -52,8 +52,8 @@
 
 #define NFSDBG_FACILITY		NFSDBG_CLIENT
 
-static DEFINE_SPINLOCK(nfs_client_lock);
-static LIST_HEAD(nfs_client_list);
+DEFINE_SPINLOCK(nfs_client_lock);
+LIST_HEAD(nfs_client_list);
 static LIST_HEAD(nfs_volume_list);
 static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
 #ifdef CONFIG_NFS_V4
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 769274ed..ff084d2 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -377,6 +377,7 @@
 #include <linux/nfs_fs.h>
 
 #include "nfs4_fs.h"
+#include "internal.h"
 
 #define IDMAP_HASH_SZ          128
 
@@ -530,6 +531,80 @@
 	kfree(idmap);
 }
 
+static int __rpc_pipefs_event(struct nfs_client *clp, unsigned long event,
+			      struct super_block *sb)
+{
+	int err = 0;
+
+	switch (event) {
+	case RPC_PIPEFS_MOUNT:
+		BUG_ON(clp->cl_rpcclient->cl_dentry == NULL);
+		err = __nfs_idmap_register(clp->cl_rpcclient->cl_dentry,
+						clp->cl_idmap,
+						clp->cl_idmap->idmap_pipe);
+		break;
+	case RPC_PIPEFS_UMOUNT:
+		if (clp->cl_idmap->idmap_pipe) {
+			struct dentry *parent;
+
+			parent = clp->cl_idmap->idmap_pipe->dentry->d_parent;
+			__nfs_idmap_unregister(clp->cl_idmap->idmap_pipe);
+			/*
+			 * Note: This is a dirty hack. SUNRPC hook has been
+			 * called already but simple_rmdir() call for the
+			 * directory returned with error because of idmap pipe
+			 * inside. Thus now we have to remove this directory
+			 * here.
+			 */
+			if (rpc_rmdir(parent))
+				printk(KERN_ERR "%s: failed to remove clnt dir!\n", __func__);
+		}
+		break;
+	default:
+		printk(KERN_ERR "%s: unknown event: %ld\n", __func__, event);
+		return -ENOTSUPP;
+	}
+	return err;
+}
+
+static int rpc_pipefs_event(struct notifier_block *nb, unsigned long event,
+			    void *ptr)
+{
+	struct super_block *sb = ptr;
+	struct nfs_client *clp;
+	int error = 0;
+
+	spin_lock(&nfs_client_lock);
+	list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+		if (clp->net != sb->s_fs_info)
+			continue;
+		if (clp->rpc_ops != &nfs_v4_clientops)
+			continue;
+		error = __rpc_pipefs_event(clp, event, sb);
+		if (error)
+			break;
+	}
+	spin_unlock(&nfs_client_lock);
+	return error;
+}
+
+#define PIPEFS_NFS_PRIO		1
+
+static struct notifier_block nfs_idmap_block = {
+	.notifier_call	= rpc_pipefs_event,
+	.priority	= SUNRPC_PIPEFS_NFS_PRIO,
+};
+
+int nfs_idmap_init(void)
+{
+	return rpc_pipefs_notifier_register(&nfs_idmap_block);
+}
+
+void nfs_idmap_quit(void)
+{
+	rpc_pipefs_notifier_unregister(&nfs_idmap_block);
+}
+
 /*
  * Helper routines for manipulating the hashtable
  */
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index d602188..2b9836f 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -182,6 +182,10 @@
 {
 }
 #endif
+#ifdef CONFIG_NFS_V4
+extern spinlock_t nfs_client_lock;
+extern struct list_head nfs_client_list;
+#endif
 
 /* nfs4namespace.c */
 #ifdef CONFIG_NFS_V4
diff --git a/include/linux/nfs_idmap.h b/include/linux/nfs_idmap.h
index 308c188..3c9eeb7 100644
--- a/include/linux/nfs_idmap.h
+++ b/include/linux/nfs_idmap.h
@@ -69,10 +69,20 @@
 struct nfs_fattr;
 struct nfs4_string;
 
-#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
-
+#ifdef CONFIG_NFS_V4
 int nfs_idmap_init(void);
 void nfs_idmap_quit(void);
+#else
+static inline int nfs_idmap_init(void)
+{
+	return 0;
+}
+
+static inline void nfs_idmap_quit(void)
+{}
+#endif
+
+#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
 
 static inline int nfs_idmap_new(struct nfs_client *clp)
 {
@@ -85,15 +95,6 @@
 
 #else /* CONFIG_NFS_USE_NEW_IDMAPPER not set */
 
-static inline int nfs_idmap_init(void)
-{
-	return 0;
-}
-
-static inline void nfs_idmap_quit(void)
-{
-}
-
 int nfs_idmap_new(struct nfs_client *);
 void nfs_idmap_delete(struct nfs_client *);
 
diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index 0d1f748..ca32ebd 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -49,6 +49,11 @@
 	return container_of(inode, struct rpc_inode, vfs_inode);
 }
 
+enum {
+	SUNRPC_PIPEFS_NFS_PRIO,
+	SUNRPC_PIPEFS_RPC_PRIO,
+};
+
 extern int rpc_pipefs_notifier_register(struct notifier_block *);
 extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
 
@@ -78,6 +83,8 @@
 					   struct cache_detail *);
 extern void rpc_remove_cache_dir(struct dentry *);
 
+extern int rpc_rmdir(struct dentry *dentry);
+
 struct rpc_pipe *rpc_mkpipe_data(const struct rpc_pipe_ops *ops, int flags);
 void rpc_destroy_pipe_data(struct rpc_pipe *pipe);
 extern struct dentry *rpc_mkpipe_dentry(struct dentry *, const char *, void *,
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index ed7c22d..4c68480 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -222,6 +222,7 @@
 
 static struct notifier_block rpc_clients_block = {
 	.notifier_call	= rpc_pipefs_event,
+	.priority	= SUNRPC_PIPEFS_RPC_PRIO,
 };
 
 int rpc_clients_notifier_register(void)
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 6b417fc..bae4e71 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -616,6 +616,22 @@
 	return ret;
 }
 
+int rpc_rmdir(struct dentry *dentry)
+{
+	struct dentry *parent;
+	struct inode *dir;
+	int error;
+
+	parent = dget_parent(dentry);
+	dir = parent->d_inode;
+	mutex_lock_nested(&dir->i_mutex, I_MUTEX_PARENT);
+	error = __rpc_rmdir(dir, dentry);
+	mutex_unlock(&dir->i_mutex);
+	dput(parent);
+	return error;
+}
+EXPORT_SYMBOL_GPL(rpc_rmdir);
+
 static int __rpc_unlink(struct inode *dir, struct dentry *dentry)
 {
 	int ret;