linux-kernel - [PATCH 4.2 102/134] workqueue: Make flush_workqueue() available again to non GPL modules

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Date:	Sat, 26 Sep 2015 13:55:54 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Tim Gardner <tim.gardner@...onical.com>,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 4.2 102/134] workqueue: Make flush_workqueue() available again to non GPL modules

4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tim Gardner <tim.gardner@...onical.com>

commit 1dadafa86a779884f14a6e7a3ddde1a57b0a0a65 upstream.

Commit 37b1ef31a568fc02e53587620226e5f3c66454c8 ("workqueue: move
flush_scheduled_work() to workqueue.h") moved the exported non GPL
flush_scheduled_work() from a function to an inline wrapper.
Unfortunately, it directly calls flush_workqueue() which is a GPL function.
This has the effect of changing the licensing requirement for this function
and makes it unavailable to non GPL modules.

See commit ad7b1f841f8a54c6d61ff181451f55b68175e15a ("workqueue: Make
schedule_work() available again to non GPL modules") for precedent.

Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
Signed-off-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 kernel/workqueue.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2614,7 +2614,7 @@ void flush_workqueue(struct workqueue_st
 out_unlock:
 	mutex_unlock(&wq->mutex);
 }
-EXPORT_SYMBOL_GPL(flush_workqueue);
+EXPORT_SYMBOL(flush_workqueue);

 /**
  * drain_workqueue - drain a workqueue

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