kobject: add kobject_create_and_add function

This lets users create dynamic kobjects much easier.

Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index f91aeb7..33e7a61 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -91,6 +91,9 @@
 
 extern void kobject_del(struct kobject *);
 
+extern struct kobject * __must_check kobject_create_and_add(const char *name,
+						struct kobject *parent);
+
 extern int __must_check kobject_rename(struct kobject *, const char *new_name);
 extern int __must_check kobject_move(struct kobject *, struct kobject *);