extern atomic_t nr_ipc_ns;
extern spinlock_t mq_lock;
-#if defined(CONFIG_POSIX_MQUEUE) || defined(CONFIG_SYSVIPC)
-#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
-#else
-#define INIT_IPC_NS(ns)
-#endif
#ifdef CONFIG_SYSVIPC
extern int register_ipcns_notifier(struct ipc_namespace *);