centos man page for flush_work

FLUSH_WORK(9)							   Driver Basics						     FLUSH_WORK(9)

NAME
       flush_work - wait for a work to finish executing the last queueing instance

SYNOPSIS
       bool flush_work(struct work_struct * work);

ARGUMENTS
       work
	   the work to flush

DESCRIPTION
       Wait until work has finished execution.	work is guaranteed to be idle on return if it hasn't been requeued since flush started.

RETURNS
       true if flush_work waited for the work to finish execution, false if it was already idle.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							     FLUSH_WORK(9)