Merge remote-tracking branch 'linux-stable/linux-4.15.y' into bcachefs-buffered-io-2

1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index f699122dab32..34f1e1a2ec12 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -4169,6 +4169,22 @@ void workqueue_set_max_active(struct workqueue_struct *wq, int max_active)
 EXPORT_SYMBOL_GPL(workqueue_set_max_active);
 
 /**
+ * current_work - retrieve %current task's work struct
+ *
+ * Determine if %current task is a workqueue worker and what it's working on.
+ * Useful to find out the context that the %current task is running in.
+ *
+ * Return: work struct if %current task is a workqueue worker, %NULL otherwise.
+ */
+struct work_struct *current_work(void)
+{
+	struct worker *worker = current_wq_worker();
+
+	return worker ? worker->current_work : NULL;
+}
+EXPORT_SYMBOL(current_work);
+
+/**
  * current_is_workqueue_rescuer - is %current workqueue rescuer?
  *
  * Determine whether %current is a workqueue rescuer.  Can be used from