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workqueue: Remove unnecessary kfree() call in rcu_free_wq()

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The data structure member "wq->rescuer" was reset to a null pointer
in one if branch. It was passed to a call of the function "kfree"
in the callback function "rcu_free_wq" (which was eventually executed).
The function "kfree" does not perform more meaningful data processing
for a passed null pointer (besides immediately returning from such a call).
Thus delete this function call which became unnecessary with the referenced
software update.

Fixes: def98c84b6cd ("workqueue: Fix spurious sanity check failures in destroy_workqueue()")

Suggested-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Zhang Qiang <qiang.zhang@windriver.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Zhang Qiang 2020-05-27 15:57:15 +08:00 committed by Tejun Heo
parent b92b36eadf
commit 342ed2400b
1 changed files with 0 additions and 1 deletions
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kernel/workqueue.c
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@ -3491,7 +3491,6 @@ static void rcu_free_wq(struct rcu_head *rcu)
else
free_workqueue_attrs(wq->unbound_attrs);
kfree(wq->rescuer);
kfree(wq);
}