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20bdedafd2
Based on commit c4f135d643823a86 ("workqueue: Wrap flush_workqueue() using a macro"), all in-tree users stopped flushing system-wide workqueues. Therefore, start emitting runtime message so that all out-of-tree users will understand that they need to update their code. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Tejun Heo <tj@kernel.org>