namespace.c: get rid of mnt_ghosts

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/mount.h b/fs/mount.h
index 64a8581..3168dc4 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -55,7 +55,7 @@
 	int mnt_group_id;		/* peer group identifier */
 	int mnt_expiry_mark;		/* true if marked for expiry */
 	int mnt_pinned;
-	int mnt_ghosts;
+	struct path mnt_ex_mountpoint;
 };
 
 #define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */