centos man page for wait_event_killable

WAIT_EVENT_KILLABLE(9)						   Driver Basics					    WAIT_EVENT_KILLABLE(9)

NAME
       wait_event_killable - sleep until a condition gets true

SYNOPSIS
       wait_event_killable(wq, condition);

ARGUMENTS
       wq
	   the waitqueue to wait on

       condition
	   a C expression for the event to wait for

DESCRIPTION
       The process is put to sleep (TASK_KILLABLE) 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 will return -ERESTARTSYS if it was interrupted by a signal and 0 if condition evaluated to true.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    WAIT_EVENT_KILLABLE(9)