centos man page for schedule_timeout

SCHEDULE_TIMEOUT(9)						   Driver Basics					       SCHEDULE_TIMEOUT(9)

NAME
       schedule_timeout - sleep until timeout

SYNOPSIS
       signed long __sched schedule_timeout(signed long timeout);

ARGUMENTS
       timeout
	   timeout value in jiffies

DESCRIPTION
       Make the current task sleep until timeout jiffies have elapsed. The routine will return immediately unless the current task state has been
       set (see set_current_state).

       You can set the task state as follows -

       TASK_UNINTERRUPTIBLE - at least timeout jiffies are guaranteed to pass before the routine returns. The routine will return 0

       TASK_INTERRUPTIBLE - the routine may return early if a signal is delivered to the current task. In this case the remaining time in jiffies
       will be returned, or 0 if the timer expired in time

       The current task state is guaranteed to be TASK_RUNNING when this routine returns.

       Specifying a timeout value of MAX_SCHEDULE_TIMEOUT will schedule the CPU away without a bound on the timeout. In this case the return value
       will be MAX_SCHEDULE_TIMEOUT.

       In all cases the return value is guaranteed to be non-negative.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						       SCHEDULE_TIMEOUT(9)