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nvme: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

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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>
This commit is contained in:
Andreea-Cristina Bernat 2014-08-18 17:41:01 +03:00 committed by Jens Axboe
parent 5905535610
commit 062261be4e
1 changed files with 1 additions and 1 deletions
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2
drivers/block/nvme-core.c
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@ -1230,7 +1230,7 @@ static void nvme_free_queues(struct nvme_dev *dev, int lowest)
for (i = dev->queue_count - 1; i >= lowest; i--) {
nvmeq = raw_nvmeq(dev, i);
rcu_assign_pointer(dev->queues[i], NULL);
RCU_INIT_POINTER(dev->queues[i], NULL);
llist_add(&nvmeq->node, &q_list);
dev->queue_count--;
}