If the worker task is not idle, it may sleep on some conditions by the request
of the work.  Our unfriendly wakeup in the insert_kthread_work() may confuse
the worker.

Signed-off-by: Lai Jiangshan <la...@cn.fujitsu.com>
---
 kernel/kthread.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index c2390f4..ef48322 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -591,7 +591,7 @@ static void insert_kthread_work(struct kthread_worker 
*worker,
 
        list_add_tail(&work->node, pos);
        work->worker = worker;
-       if (likely(worker->task))
+       if (!worker->current_work && likely(worker->task))
                wake_up_process(worker->task);
 }
 
-- 
1.7.4.4

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