suse man page for flush_workqueue

FLUSH_WORKQUEUE(9)						   Driver Basics						FLUSH_WORKQUEUE(9)

NAME
       flush_workqueue - ensure that any scheduled work has run to completion.

SYNOPSIS
       void flush_workqueue(struct workqueue_struct * wq);

ARGUMENTS
       wq
	   workqueue to flush

DESCRIPTION
       Forces execution of the workqueue and blocks until its completion. This is typically used in driver shutdown handlers.

       We sleep until all works which were queued on entry have been handled, but we are not livelocked by new incoming ones.

       This function used to run the workqueues itself. Now we just wait for the helper threads to do it.

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