centos man page for wait_event_interruptible_lock_irq_timeout

WAIT_EVENT_INTERRUPT(9) 					   Driver Basics					   WAIT_EVENT_INTERRUPT(9)

NAME
       wait_event_interruptible_lock_irq_timeout - sleep until a condition gets true or a timeout elapses. The condition is checked under the
       lock. This is expected to be called with the lock taken.

SYNOPSIS
       wait_event_interruptible_lock_irq_timeout(wq, condition, lock, timeout);

ARGUMENTS
       wq
	   the waitqueue to wait on

       condition
	   a C expression for the event to wait for

       lock
	   a locked spinlock_t, which will be released before schedule and reacquired afterwards.

       timeout
	   timeout, in jiffies

DESCRIPTION
       The process is put to sleep (TASK_INTERRUPTIBLE) until the condition evaluates to true or 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.

       This is supposed to be called while holding the lock. The lock is dropped before going to sleep and is reacquired afterwards.

       The function returns 0 if the timeout elapsed, -ERESTARTSYS if it was interrupted by a signal, and the remaining jiffies otherwise if the
       condition evaluated to true before the timeout elapsed.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   WAIT_EVENT_INTERRUPT(9)