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wait_event_interruptible_lock_irq_timeout(9) [centos man page]

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)

Check Out this Related Man Page

KPAUSE(9)						   BSD Kernel Developer's Manual						 KPAUSE(9)

NAME
kpause -- make the calling LWP sleep SYNOPSIS
#include <sys/proc.h> int kpause(const char *wmesg, bool intr, int timeo, kmutex_t *mtx); DESCRIPTION
kpause() makes the calling LWP sleep. It's similar to cv_timedwait_sig(9) without the corresponding cv_signal(9). kpause() can wake up spontaneously. Callers should prepare to handle it. wmesg Specifies a string of no more than 8 characters that describes the resource or condition associated with the call of kpause(). The kernel does not use this argument directly but makes it available for utilities such as ps(1) to display. intr If true, sleep interruptably. If the LWP receives a signal, or is interrupted by another condition such as its containing process exiting, the wait is ended early and an error code returned. timeo Specify a timeout. It is an architecture and system dependent value related to the number of clock interrupts per second. See hz(9) for details. The mstohz(9) macro can be used to convert a timeout expressed in milliseconds to one suitable for kpause(). Zero means no timeout. mtx Convenience and symmetry with other synchronization operations. If not NULL, mtx will be released once the LWP has prepared to sleep, and will be reacquired before kpause() returns. RETURN VALUES
kpause() returns 0 when waking up spontaneously. Otherwise, It returns an error number. ERRORS
[EINTR] kpause() returned due to other reasons. Typically as a result of a signal without SA_RESTART property. [ERESTART] kpause() returned as a result of a signal with SA_RESTART property. [EWOULDBLOCK] The timeout expired. SEE ALSO
sigaction(2), condvar(9), delay(9), errno(9), hz(9), mstohz(9) BSD
July 20, 2011 BSD

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