linux-master/ipc/sem.c

480 	struct kern_ipc_perm *ipcp = ipc_obtain_object_idr(&sem_ids(ns), id);
482 	if (IS_ERR(ipcp))
483 		return ERR_CAST(ipcp);
485 	return container_of(ipcp, struct sem_array, sem_perm);
491 	struct kern_ipc_perm *ipcp = ipc_obtain_object_check(&sem_ids(ns), id);
493 	if (IS_ERR(ipcp))
494 		return ERR_CAST(ipcp);
496 	return container_of(ipcp, struct sem_array, sem_perm);
589  * Called with sem_ids.rwsem and ipcp locked.
591 static int sem_more_checks(struct kern_ipc_perm *ipcp, struct ipc_params *params)
595 	sma = container_of(ipcp, struct sem_array, sem_perm);
1143 static void freeary(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
1147 	struct sem_array *sma = container_of(ipcp, struct sem_array, sem_perm);
1606 	struct kern_ipc_perm *ipcp;
1611 	ipcp = ipcctl_obtain_check(ns, &sem_ids(ns), semid, cmd,
1613 	if (IS_ERR(ipcp)) {
1614 		err = PTR_ERR(ipcp);
1618 	sma = container_of(ipcp, struct sem_array, sem_perm);
1628 		freeary(ns, ipcp);
1632 		err = ipc_update_perm(&semid64->sem_perm, ipcp);
2452 	struct kern_ipc_perm *ipcp = it;
2453 	struct sem_array *sma = container_of(ipcp, struct sem_array, sem_perm);