--- linux-2.6.21-rc3/include/linux/dcache.h	2007-03-07 17:23:55.000000000 +0100
+++ linux-2.6.21-rc3-ed/include/linux/dcache.h	2007-03-07 17:27:39.000000000 +0100
@@ -133,6 +133,7 @@ struct dentry_operations {
 	int (*d_delete)(struct dentry *);
 	void (*d_release)(struct dentry *);
 	void (*d_iput)(struct dentry *, struct inode *);
+	char * (*d_dname)(struct dentry *, char *, int);
 };
 
 /* the dentry parameter passed to d_hash and d_compare is the parent
--- linux-2.6.21-rc3/fs/dcache.c	2007-03-07 17:23:55.000000000 +0100
+++ linux-2.6.21-rc3-ed/fs/dcache.c	2007-03-07 17:28:46.000000000 +0100
@@ -1823,6 +1823,9 @@ char * d_path(struct dentry *dentry, str
 	struct vfsmount *rootmnt;
 	struct dentry *root;
 
+	if (dentry->d_op && dentry->d_op->d_dname)
+		return (dentry->d_op->d_dname)(dentry, buf, buflen);
+
 	read_lock(&current->fs->lock);
 	rootmnt = mntget(current->fs->rootmnt);
 	root = dget(current->fs->root);
--- linux-2.6.21-rc3/fs/pipe.c	2007-03-07 17:42:36.000000000 +0100
+++ linux-2.6.21-rc3-ed/fs/pipe.c	2007-03-07 18:54:33.000000000 +0100
@@ -841,8 +841,15 @@ static int pipefs_delete_dentry(struct d
 	return 0;
 }
 
+static char * pipefs_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+	snprintf(buffer, buflen, "pipe:[%lu]", dentry->d_inode->i_ino);
+	return buffer;
+}
+
 static struct dentry_operations pipefs_dentry_operations = {
 	.d_delete	= pipefs_delete_dentry,
+	.d_dname	= pipefs_dname,
 };
 
 static struct inode * get_pipe_inode(void)
@@ -888,7 +895,6 @@ struct file *create_write_pipe(void)
 	struct inode *inode;
 	struct file *f;
 	struct dentry *dentry;
-	char name[32];
 	struct qstr this;
 
 	f = get_empty_filp();
@@ -899,8 +905,8 @@ struct file *create_write_pipe(void)
 	if (!inode)
 		goto err_file;
 
-	this.len = sprintf(name, "[%lu]", inode->i_ino);
-	this.name = name;
+	this.len = 0;
+	this.name = NULL;
 	this.hash = 0;
 	err = -ENOMEM;
 	dentry = d_alloc(pipe_mnt->mnt_sb->s_root, &this);
--- linux-2.6.21-rc3/net/socket.c	2007-03-07 17:37:56.000000000 +0100
+++ linux-2.6.21-rc3-ed/net/socket.c	2007-03-07 18:54:33.000000000 +0100
@@ -314,8 +314,16 @@ static int sockfs_delete_dentry(struct d
 	dentry->d_flags |= DCACHE_UNHASHED;
 	return 0;
 }
+
+static char * sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+	snprintf(buffer, buflen, "socket:[%lu]", dentry->d_inode->i_ino);
+	return buffer;
+}
+
 static struct dentry_operations sockfs_dentry_operations = {
 	.d_delete = sockfs_delete_dentry,
+	.d_dname  = sockfs_dname,
 };
 
 /*
@@ -356,10 +364,9 @@ static int sock_alloc_fd(struct file **f
 static int sock_attach_fd(struct socket *sock, struct file *file)
 {
 	struct qstr this;
-	char name[32];
 
-	this.len = sprintf(name, "[%lu]", SOCK_INODE(sock)->i_ino);
-	this.name = name;
+	this.len = 0;
+	this.name = NULL;
 	this.hash = 0;
 
 	file->f_path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &this);