kobject: convert main fs kobject to use kobject_create

This also renames fs_subsys to fs_kobj to catch all current users with a
build error instead of a build warning which can easily be missed.


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

diff --git a/fs/namespace.c b/fs/namespace.c
index a4a3f70..61bf376 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -41,8 +41,8 @@
 static struct rw_semaphore namespace_sem;
 
 /* /sys/fs */
-decl_subsys(fs, NULL);
-EXPORT_SYMBOL_GPL(fs_subsys);
+struct kobject *fs_kobj;
+EXPORT_SYMBOL_GPL(fs_kobj);
 
 static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
 {
@@ -1861,10 +1861,9 @@
 	if (err)
 		printk(KERN_WARNING "%s: sysfs_init error: %d\n",
 			__FUNCTION__, err);
-	err = subsystem_register(&fs_subsys);
-	if (err)
-		printk(KERN_WARNING "%s: subsystem_register error: %d\n",
-			__FUNCTION__, err);
+	fs_kobj = kobject_create_and_add("fs", NULL);
+	if (!fs_kobj)
+		printk(KERN_WARNING "%s: kobj create error\n", __FUNCTION__);
 	init_rootfs();
 	init_mount_tree();
 }