wait_event_freezable — sleep (or freeze) until a condition gets true
wait_event_freezable ( | wq, |
condition); |
The process is put to sleep (TASK_INTERRUPTIBLE -- so as not to contribute
to system load) until the condition evaluates to true. The
condition is checked each time the waitqueue wq is woken up.
wake_up has to be called after changing any variable that could
change the result of the wait condition.