mirror of https://gitee.com/openkylin/linux.git
nvme: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
The use of "rcu_assign_pointer()" is NULLing out the pointer. According to RCU_INIT_POINTER()'s block comment: "1. This use of RCU_INIT_POINTER() is NULLing out the pointer" it is better to use it instead of rcu_assign_pointer() because it has a smaller overhead. The following Coccinelle semantic patch was used: @@ @@ - rcu_assign_pointer + RCU_INIT_POINTER (..., NULL) Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -1230,7 +1230,7 @@ static void nvme_free_queues(struct nvme_dev *dev, int lowest)
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for (i = dev->queue_count - 1; i >= lowest; i--) {
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nvmeq = raw_nvmeq(dev, i);
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rcu_assign_pointer(dev->queues[i], NULL);
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RCU_INIT_POINTER(dev->queues[i], NULL);
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llist_add(&nvmeq->node, &q_list);
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dev->queue_count--;
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}
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