suse man page for __wake_up

__WAKE_UP(9)							   Driver Basics						      __WAKE_UP(9)

NAME
       __wake_up - wake up threads blocked on a waitqueue.

SYNOPSIS
       void __wake_up(wait_queue_head_t * q, unsigned int mode, int nr_exclusive, void * key);

ARGUMENTS
       q
	   the waitqueue

       mode
	   which threads

       nr_exclusive
	   how many wake-one or wake-many threads to wake up

       key
	   is directly passed to the wakeup function

DESCRIPTION
       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(9)