common object embedded into various struct ....ns

for now - just move corresponding ->proc_inum instances over there

Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index aa312b0..fde5840 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -86,7 +86,7 @@
 	if (!ns)
 		return -ENOMEM;
 
-	ret = proc_alloc_inum(&ns->proc_inum);
+	ret = proc_alloc_inum(&ns->ns.inum);
 	if (ret) {
 		kmem_cache_free(user_ns_cachep, ns);
 		return ret;
@@ -136,7 +136,7 @@
 #ifdef CONFIG_PERSISTENT_KEYRINGS
 		key_put(ns->persistent_keyring_register);
 #endif
-		proc_free_inum(ns->proc_inum);
+		proc_free_inum(ns->ns.inum);
 		kmem_cache_free(user_ns_cachep, ns);
 		ns = parent;
 	} while (atomic_dec_and_test(&parent->count));
@@ -891,7 +891,7 @@
 static unsigned int userns_inum(void *ns)
 {
 	struct user_namespace *user_ns = ns;
-	return user_ns->proc_inum;
+	return user_ns->ns.inum;
 }
 
 const struct proc_ns_operations userns_operations = {