suse man page for wake_up_process

WAKE_UP_PROCESS(9)						   Driver Basics						WAKE_UP_PROCESS(9)

NAME
       wake_up_process - Wake up a specific process

SYNOPSIS
       int wake_up_process(struct task_struct * p);

ARGUMENTS
       p
	   The process to be woken up.

DESCRIPTION
       Attempt to wake up the nominated process and move it to the set of runnable processes. Returns 1 if the process was woken up, 0 if it was
       already running.

       It may be assumed that this function implies a write memory barrier before changing the task state if and only if any tasks are woken up.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							WAKE_UP_PROCESS(9)