centos 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
       This function sleeps until all work items which were queued on entry have finished execution, but it is not livelocked by new incoming
       ones.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							FLUSH_WORKQUEUE(9)