centos man page for cancel_delayed_work

CANCEL_DELAYED_WORK(9)						   Driver Basics					    CANCEL_DELAYED_WORK(9)

NAME
       cancel_delayed_work - cancel a delayed work

SYNOPSIS
       bool cancel_delayed_work(struct delayed_work * dwork);

ARGUMENTS
       dwork
	   delayed_work to cancel

DESCRIPTION
       Kill off a pending delayed_work. Returns true if dwork was pending and canceled; false if wasn't pending. Note that the work callback
       function may still be running on return, unless it returns true and the work doesn't re-arm itself. Explicitly flush or use
       cancel_delayed_work_sync to wait on it.

       This function is safe to call from any context including IRQ handler.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						    CANCEL_DELAYED_WORK(9)