In 51697d393922 ("workqueue: use generic attach/detach routine for rescuers"),
The rescuer detaches itself from the pool before put_pwq() so that
the put_unbound_pool() will not destroy the rescuer-attached pool.
It is unnecessary, worker_detach_from_pool() can be used as the last
statement to access to the pool as the same as the regular workers,
put_unbound_pool() will wait for it to detach and then free the pool.
So we move the worker_detach_from_pool() down, make it coincide with
the regular workers.
Signed-off-by: Lai Jiangshan <la...@cn.fujitsu.com>
---
kernel/workqueue.c | 14 ++++++--------
1 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index bf837b0..347ac5b 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2252,15 +2252,10 @@ repeat:
move_linked_works(work, scheduled, &n);
process_scheduled_works(rescuer);
- spin_unlock_irq(&pool->lock);
-
- worker_detach_from_pool(rescuer, pool);
-
- spin_lock_irq(&pool->lock);
/*
* Put the reference grabbed by send_mayday(). @pool won't
- * go away while we're holding its lock.
+ * go away while we're still attached to it.
*/
put_pwq(pwq);
@@ -2273,8 +2268,11 @@ repeat:
wake_up_worker(pool);
rescuer->pool = NULL;
- spin_unlock(&pool->lock);
- spin_lock(&wq_mayday_lock);
+ spin_unlock_irq(&pool->lock);
+
+ worker_detach_from_pool(rescuer, pool);
+
+ spin_lock_irq(&wq_mayday_lock);
}
spin_unlock_irq(&wq_mayday_lock);
--
1.7.4.4
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