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/fs/mount.h b/fs/mount.h
index f82c628..0ad6f76 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -1,10 +1,11 @@
 #include <linux/mount.h>
 #include <linux/seq_file.h>
 #include <linux/poll.h>
+#include <linux/ns_common.h>
 
 struct mnt_namespace {
 	atomic_t		count;
-	unsigned int		proc_inum;
+	struct ns_common	ns;
 	struct mount *	root;
 	struct list_head	list;
 	struct user_namespace	*user_ns;
diff --git a/fs/namespace.c b/fs/namespace.c
index 5b66b2b..adc2ea2 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2640,7 +2640,7 @@
 
 static void free_mnt_ns(struct mnt_namespace *ns)
 {
-	proc_free_inum(ns->proc_inum);
+	proc_free_inum(ns->ns.inum);
 	put_user_ns(ns->user_ns);
 	kfree(ns);
 }
@@ -2662,7 +2662,7 @@
 	new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
 	if (!new_ns)
 		return ERR_PTR(-ENOMEM);
-	ret = proc_alloc_inum(&new_ns->proc_inum);
+	ret = proc_alloc_inum(&new_ns->ns.inum);
 	if (ret) {
 		kfree(new_ns);
 		return ERR_PTR(ret);
@@ -3201,7 +3201,7 @@
 static unsigned int mntns_inum(void *ns)
 {
 	struct mnt_namespace *mnt_ns = ns;
-	return mnt_ns->proc_inum;
+	return mnt_ns->ns.inum;
 }
 
 const struct proc_ns_operations mntns_operations = {