FLUSH_SCHEDULED_WORK(9) Driver Basics FLUSH_SCHEDULED_WORK(9)NAMEflush_scheduled_work - ensure that any scheduled work has run to
completion.
SYNOPSIS
void flush_scheduled_work(void);
ARGUMENTS
void
no arguments
DESCRIPTION
Forces execution of the kernel-global workqueue and blocks until its
completion.
Think twice before calling this function! It's very easy to get into
trouble if you don't take great care. Either of the following
situations
WILL LEAD TO DEADLOCK
One of the work items currently on the workqueue needs to acquire a
lock held by your code or its caller.
Your code is running in the context of a work routine.
They will be detected by lockdep when they occur, but the first might
not occur very often. It depends on what work items are on the
workqueue and what locks they need, which you have no control over.
In most situations flushing the entire workqueue is overkill; you
merely need to know that a particular work item isn't queued and isn't
running. In such cases you should use cancel_delayed_work_sync or
cancel_work_sync instead.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 FLUSH_SCHEDULED_WORK(9)
