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-rw-r--r--include/linux/workqueue.h31
1 files changed, 30 insertions, 1 deletions
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index deee212af8e0..738b30b39b68 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -424,6 +424,7 @@ struct workqueue_attrs *alloc_workqueue_attrs(gfp_t gfp_mask);
void free_workqueue_attrs(struct workqueue_attrs *attrs);
int apply_workqueue_attrs(struct workqueue_struct *wq,
const struct workqueue_attrs *attrs);
+int workqueue_set_unbound_cpumask(cpumask_var_t cpumask);
extern bool queue_work_on(int cpu, struct workqueue_struct *wq,
struct work_struct *work);
@@ -434,7 +435,6 @@ extern bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq,
extern void flush_workqueue(struct workqueue_struct *wq);
extern void drain_workqueue(struct workqueue_struct *wq);
-extern void flush_scheduled_work(void);
extern int schedule_on_each_cpu(work_func_t func);
@@ -531,6 +531,35 @@ static inline bool schedule_work(struct work_struct *work)
}
/**
+ * flush_scheduled_work - ensure that any scheduled work has run to completion.
+ *
+ * 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.
+ */
+static inline void flush_scheduled_work(void)
+{
+ flush_workqueue(system_wq);
+}
+
+/**
* schedule_delayed_work_on - queue work in global workqueue on CPU after delay
* @cpu: cpu to use
* @dwork: job to be done