111 					struct unix_sock *u = unix_sk(sk);  in scan_inflight()  local
117 					if (test_bit(UNIX_GC_CANDIDATE, &u->gc_flags)) {  in scan_inflight()
120 						func(u);  in scan_inflight()
141 		struct unix_sock *u;  in scan_children()  local
149 			u = unix_sk(skb->sk);  in scan_children()
154 			BUG_ON(!list_empty(&u->link));  in scan_children()
155 			list_add_tail(&u->link, &embryos);  in scan_children()
160 			u = list_entry(embryos.next, struct unix_sock, link);  in scan_children()
161 			scan_inflight(&u->sk, func, hitlist);  in scan_children()
162 			list_del_init(&u->link);  in scan_children()
177 static void inc_inflight_move_tail(struct unix_sock *u)  in inc_inflight_move_tail()  argument
179 	atomic_long_inc(&u->inflight);  in inc_inflight_move_tail()
184 	if (test_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags))  in inc_inflight_move_tail()
185 		list_move_tail(&u->link, &gc_candidates);  in inc_inflight_move_tail()
208 	struct unix_sock *u;  in unix_gc()  local
238 	list_for_each_entry_safe(u, next, &gc_inflight_list, link) {  in unix_gc()
242 		total_refs = file_count(u->sk.sk_socket->file);  in unix_gc()
243 		inflight_refs = atomic_long_read(&u->inflight);  in unix_gc()
248 			list_move_tail(&u->link, &gc_candidates);  in unix_gc()
249 			__set_bit(UNIX_GC_CANDIDATE, &u->gc_flags);  in unix_gc()
250 			__set_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags);  in unix_gc()
257 	list_for_each_entry(u, &gc_candidates, link)  in unix_gc()
258 		scan_children(&u->sk, dec_inflight, NULL);  in unix_gc()
269 		u = list_entry(cursor.next, struct unix_sock, link);  in unix_gc()
272 		list_move(&cursor, &u->link);  in unix_gc()
274 		if (atomic_long_read(&u->inflight) > 0) {  in unix_gc()
275 			list_move_tail(&u->link, &not_cycle_list);  in unix_gc()
276 			__clear_bit(UNIX_GC_MAYBE_CYCLE, &u->gc_flags);  in unix_gc()
277 			scan_children(&u->sk, inc_inflight_move_tail, NULL);  in unix_gc()
287 	list_for_each_entry(u, &gc_candidates, link)  in unix_gc()
288 		scan_children(&u->sk, inc_inflight, &hitlist);  in unix_gc()
294 		u = list_entry(not_cycle_list.next, struct unix_sock, link);  in unix_gc()
295 		__clear_bit(UNIX_GC_CANDIDATE, &u->gc_flags);  in unix_gc()
296 		list_move_tail(&u->link, &gc_inflight_list);  in unix_gc()
322 	list_for_each_entry_safe(u, next, &gc_candidates, link)  in unix_gc()
323 		list_move_tail(&u->link, &gc_inflight_list);  in unix_gc()