stp_work_mutex    503 arch/s390/kernel/time.c static DEFINE_MUTEX(stp_work_mutex);
stp_work_mutex    649 arch/s390/kernel/time.c 	mutex_lock(&stp_work_mutex);
stp_work_mutex    683 arch/s390/kernel/time.c 	mutex_unlock(&stp_work_mutex);