1FLUSH_SCHEDULED_WORK(9)          Driver Basics         FLUSH_SCHEDULED_WORK(9)
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NAME

6       flush_scheduled_work - ensure that any scheduled work has run to
7       completion.
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SYNOPSIS

10       void flush_scheduled_work(void);
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ARGUMENTS

13       void
14           no arguments
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DESCRIPTION

17       Forces execution of the kernel-global workqueue and blocks until its
18       completion.
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20       Think twice before calling this function! It's very easy to get into
21       trouble if you don't take great care. Either of the following
22       situations
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WILL LEAD TO DEADLOCK

25       One of the work items currently on the workqueue needs to acquire a
26       lock held by your code or its caller.
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28       Your code is running in the context of a work routine.
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30       They will be detected by lockdep when they occur, but the first might
31       not occur very often. It depends on what work items are on the
32       workqueue and what locks they need, which you have no control over.
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34       In most situations flushing the entire workqueue is overkill; you
35       merely need to know that a particular work item isn't queued and isn't
36       running. In such cases you should use cancel_delayed_work_sync or
37       cancel_work_sync instead.
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40Kernel Hackers Manual 3.10         June 2019           FLUSH_SCHEDULED_WORK(9)
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