Xenomai: process memory not locked (missing mlockall?)

#include <sys/mman.h>

mlockall(MCL_CURRENT | MCL_FUTURE);

• rt_timer_start() and rt_timer_stop() are deprecated. The timer is started now automatically.
• real-time tasks always start in primary mode
• rt_dev_ioctl() is now switching to primary (RT) mode if we're in secondary mode, so we don't need "ret = rt_task_set_mode(0, T_PRIMARY, NULL);" anymore. The only still existing exceptions are (very rare!) services that are provided for both contexts. E.g. in the 16550A driver: RTSER_RTIOC_SET_CONFIG with RTSER_SET_TIMESTAMP_HISTORY set in the config mask must run in non-RT context if the open call did so as well - consistent buffer allocation from the same type of memory pool.
• rt_task_wait_period(&overrun); : this call requires primary mode anyway and will take care for a switch back

• // CONFIG_XENO_OPT_NATIVE_INTR=y otherwise it fails with ENOSYS (38)
  err = rt_intr_create(&intr_desc, "parint", PARPORTINT, I_PROPAGATE);

 error: too few arguments to function `rt_task_wait_period'

unsigned long overr;
int ret = rt_task_wait_period(&overr);
// check overr for pending overruns