- wait_event_hrtimeout(wq, condition, timeout);
- the waitqueue to wait on
- a C expression for the event to wait for
- timeout, as a ktime_t
The process is put to sleep (TASK_UNINTERRUPTIBLE) until the condition evaluates to true or a signal is received. 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.
The function returns 0 if condition became true, or -ETIME if the timeout elapsed.