From j-nomura@ce.jp.nec.com Mon Mar 13 14:12:55 2006
Message-ID: <4415EEC1.5080201@ce.jp.nec.com>
Date: Mon, 13 Mar 2006 17:14:25 -0500
From: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
To: Andrew Morton <akpm@osdl.org>, Alasdair Kergon <agk@redhat.com>,
	Greg KH <gregkh@suse.de>, Neil Brown <neilb@suse.de>
Cc: Lars Marowsky-Bree <lmb@suse.de>,
	device-mapper development <dm-devel@redhat.com>,
	linux-kernel@vger.kernel.org
Subject: kobject_add_dir

Adding kobject_add_dir() function which creates a subdirectory
for a given kobject.

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 include/linux/kobject.h |    2 ++
 lib/kobject.c           |   38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

--- gregkh-2.6.orig/include/linux/kobject.h
+++ gregkh-2.6/include/linux/kobject.h
@@ -82,6 +82,8 @@ extern void kobject_unregister(struct ko
 extern struct kobject * kobject_get(struct kobject *);
 extern void kobject_put(struct kobject *);
 
+extern struct kobject *kobject_add_dir(struct kobject *, const char *);
+
 extern char * kobject_get_path(struct kobject *, gfp_t);
 
 struct kobj_type {
--- gregkh-2.6.orig/lib/kobject.c
+++ gregkh-2.6/lib/kobject.c
@@ -393,6 +393,44 @@ void kobject_put(struct kobject * kobj)
 }
 
 
+static void dir_release(struct kobject *kobj)
+{
+	kfree(kobj);
+}
+
+static struct kobj_type dir_ktype = {
+	.release	= dir_release,
+	.sysfs_ops	= NULL,
+	.default_attrs	= NULL,
+};
+
+/**
+ *	kobject_add_dir - add sub directory of object.
+ *	@parent:	object in which a directory is created.
+ *	@name:	directory name.
+ *
+ *	Add a plain directory object as child of given object.
+ */
+struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
+{
+	struct kobject *k;
+
+	if (!parent)
+		return NULL;
+
+	k = kzalloc(sizeof(*k), GFP_KERNEL);
+	if (!k)
+		return NULL;
+
+	k->parent = parent;
+	k->ktype = &dir_ktype;
+	kobject_set_name(k, name);
+	kobject_register(k);
+
+	return k;
+}
+EXPORT_SYMBOL_GPL(kobject_add_dir);
+
 /**
  *	kset_init - initialize a kset for use
  *	@k:	kset