1WAIT_EVENT_INTERRUPT(9)          Driver Basics         WAIT_EVENT_INTERRUPT(9)
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NAME

6       wait_event_interruptible_exclusive_locked - sleep exclusively until a
7       condition gets true
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SYNOPSIS

10       wait_event_interruptible_exclusive_locked(wq, condition);
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ARGUMENTS

13       wq
14           the waitqueue to wait on
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16       condition
17           a C expression for the event to wait for
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DESCRIPTION

20       The process is put to sleep (TASK_INTERRUPTIBLE) until the condition
21       evaluates to true or a signal is received. The condition is checked
22       each time the waitqueue wq is woken up.
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24       It must be called with wq.lock being held. This spinlock is unlocked
25       while sleeping but condition testing is done while lock is held and
26       when this macro exits the lock is held.
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28       The lock is locked/unlocked using spin_lock/spin_unlock functions which
29       must match the way they are locked/unlocked outside of this macro.
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31       The process is put on the wait queue with an WQ_FLAG_EXCLUSIVE flag set
32       thus when other process waits process on the list if this process is
33       awaken further processes are not considered.
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35       wake_up_locked has to be called after changing any variable that could
36       change the result of the wait condition.
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38       The function will return -ERESTARTSYS if it was interrupted by a signal
39       and 0 if condition evaluated to true.
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42Kernel Hackers Manual 3.10         June 2019           WAIT_EVENT_INTERRUPT(9)
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