wait_event_interruptible_hrtimeout - sleep until a condition gets true or a timeout elapses
wait_event_interruptible_hrtimeout(wq, condition, timeout);
The process is put to sleep (TASK_INTERRUPTIBLE) 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, -ERESTARTSYS if it was interrupted by a signal, or -ETIME if the timeout elapsed.
|January 2017||Kernel Hackers Manual 4.8.|