RULE = always ((RT and SLEEP and USER_THREAD) imply (RT_FRIENDLY_SLEEP or ALLOWLIST))

RT_FRIENDLY_SLEEP = RT_VALID_SLEEP_REASON
                and ((not SCHEDULE_IN) until RT_FRIENDLY_WAKE)

RT_VALID_SLEEP_REASON = FUTEX_WAIT
                     or RT_FRIENDLY_NANOSLEEP
                     or EPOLL_WAIT

RT_FRIENDLY_NANOSLEEP = CLOCK_NANOSLEEP
                    and NANOSLEEP_TIMER_ABSTIME
                    and not NANOSLEEP_CLOCK_REALTIME

RT_FRIENDLY_WAKE = WOKEN_BY_EQUAL_OR_HIGHER_PRIO
                or WOKEN_BY_HARDIRQ
                or WOKEN_BY_NMI
                or ABORT_SLEEP

ALLOWLIST = BLOCK_ON_RT_MUTEX
         or FUTEX_LOCK_PI