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Message-ID: <1401780788-12297-1-git-send-email-laijs@cn.fujitsu.com> Date: Tue, 3 Jun 2014 15:33:08 +0800 From: Lai Jiangshan <laijs@...fujitsu.com> To: <linux-kernel@...r.kernel.org> CC: Tejun Heo <tj@...nel.org>, Lai Jiangshan <laijs@...fujitsu.com> Subject: [PATCH] workqueue: sanity check pool->cpu in wq_worker_sleeping() In theory, pool->cpu is equals to @cpu in wq_worker_sleeping() after worker->flags is checked. And "pool->cpu != cpu" sanity check will help us if something wrong. Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com> --- kernel/workqueue.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 9f53abd..61381a2 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -843,7 +843,7 @@ struct task_struct *wq_worker_sleeping(struct task_struct *task, int cpu) pool = worker->pool; /* this can only happen on the local cpu */ - if (WARN_ON_ONCE(cpu != raw_smp_processor_id())) + if (WARN_ON_ONCE(cpu != raw_smp_processor_id() || pool->cpu != cpu)) return NULL; /* -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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