diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
new file mode 100644
index 0000000..67423c6
--- /dev/null
+++ b/fs/proc/proc_devtree.c
@@ -0,0 +1,165 @@
+/*
+ * proc_devtree.c - handles /proc/device-tree
+ *
+ * Copyright 1997 Paul Mackerras
+ */
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <asm/prom.h>
+#include <asm/uaccess.h>
+
+#ifndef HAVE_ARCH_DEVTREE_FIXUPS
+static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_name_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_addr_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+#endif
+
+static struct proc_dir_entry *proc_device_tree;
+
+/*
+ * Supply data on a read from /proc/device-tree/node/property.
+ */
+static int property_read_proc(char *page, char **start, off_t off,
+			      int count, int *eof, void *data)
+{
+	struct property *pp = data;
+	int n;
+
+	if (off >= pp->length) {
+		*eof = 1;
+		return 0;
+	}
+	n = pp->length - off;
+	if (n > count)
+		n = count;
+	else
+		*eof = 1;
+	memcpy(page, pp->value + off, n);
+	*start = page;
+	return n;
+}
+
+/*
+ * For a node with a name like "gc@10", we make symlinks called "gc"
+ * and "@10" to it.
+ */
+
+/*
+ * Process a node, adding entries for its children and its properties.
+ */
+void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *de)
+{
+	struct property *pp;
+	struct proc_dir_entry *ent;
+	struct device_node *child, *sib;
+	const char *p, *at;
+	int l;
+	struct proc_dir_entry *list, **lastp, *al;
+
+	set_node_proc_entry(np, de);
+	lastp = &list;
+	for (pp = np->properties; pp != 0; pp = pp->next) {
+		/*
+		 * Unfortunately proc_register puts each new entry
+		 * at the beginning of the list.  So we rearrange them.
+		 */
+		ent = create_proc_read_entry(pp->name, strncmp(pp->name, "security-", 9) ?
+					     S_IRUGO : S_IRUSR, de, property_read_proc, pp);
+		if (ent == 0)
+			break;
+		if (!strncmp(pp->name, "security-", 9))
+		     ent->size = 0; /* don't leak number of password chars */
+		else
+		     ent->size = pp->length;
+		*lastp = ent;
+		lastp = &ent->next;
+	}
+	child = NULL;
+	while ((child = of_get_next_child(np, child))) {
+		p = strrchr(child->full_name, '/');
+		if (!p)
+			p = child->full_name;
+		else
+			++p;
+		/* chop off '@0' if the name ends with that */
+		l = strlen(p);
+		if (l > 2 && p[l-2] == '@' && p[l-1] == '0')
+			l -= 2;
+		ent = proc_mkdir(p, de);
+		if (ent == 0)
+			break;
+		*lastp = ent;
+		lastp = &ent->next;
+		proc_device_tree_add_node(child, ent);
+
+		/*
+		 * If we left the address part on the name, consider
+		 * adding symlinks from the name and address parts.
+		 */
+		if (p[l] != 0 || (at = strchr(p, '@')) == 0)
+			continue;
+
+		/*
+		 * If this is the first node with a given name property,
+		 * add a symlink with the name property as its name.
+		 */
+		sib = NULL;
+		while ((sib = of_get_next_child(np, sib)) && sib != child)
+			if (sib->name && strcmp(sib->name, child->name) == 0)
+				break;
+		if (sib == child && strncmp(p, child->name, l) != 0) {
+			al = proc_symlink(child->name, de, ent->name);
+			if (al == 0) {
+				of_node_put(sib);
+				break;
+			}
+			set_node_name_link(child, al);
+			*lastp = al;
+			lastp = &al->next;
+		}
+		of_node_put(sib);
+		/*
+		 * Add another directory with the @address part as its name.
+		 */
+		al = proc_symlink(at, de, ent->name);
+		if (al == 0)
+			break;
+		set_node_addr_link(child, al);
+		*lastp = al;
+		lastp = &al->next;
+	}
+	of_node_put(child);
+	*lastp = NULL;
+	de->subdir = list;
+}
+
+/*
+ * Called on initialization to set up the /proc/device-tree subtree
+ */
+void proc_device_tree_init(void)
+{
+	struct device_node *root;
+	if ( !have_of )
+		return;
+	proc_device_tree = proc_mkdir("device-tree", NULL);
+	if (proc_device_tree == 0)
+		return;
+	root = of_find_node_by_path("/");
+	if (root == 0) {
+		printk(KERN_ERR "/proc/device-tree: can't find root\n");
+		return;
+	}
+	proc_device_tree_add_node(root, proc_device_tree);
+	of_node_put(root);
+}