--- 1614d78c60ed2c4b616b530b89f8247addbcc17f
+++ 861045fbf936854889f07cad7f8c703a771bb02f
@@ -10,6 +10,7 @@ extern void unix_inflight(struct file *f
 extern void unix_notinflight(struct file *fp);
 extern void unix_gc(void);
 extern void wait_for_unix_gc(void);
+extern struct sock *unix_get_socket(struct file *filp);
 
 #define UNIX_HASH_SIZE	256
 
@@ -56,6 +57,7 @@ struct unix_sock {
         spinlock_t		lock;
 	unsigned int		gc_candidate : 1;
 	unsigned int		gc_maybe_cycle : 1;
+	unsigned char		recursion_level;
         wait_queue_head_t       peer_wait;
 };
 #define unix_sk(__sk) ((struct unix_sock *)__sk)