/* must be called with ids->mutex acquired.*/
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);
int ipc_get_maxid(struct ipc_ids *);
/* must be called with ids->mutex acquired.*/
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);
int ipc_get_maxid(struct ipc_ids *);