NVMe: within nvme_free_queues(), delete RCU sychro/deferred free

Converting from to blk-queue got rid of the driver's RCU
locking-on-queue, so removing unnecessary RCU locking-on-queue
artefacts.

Reviewed-by: Keith Busch <keith.busch@intel.com>

Signed-off-by: Kelly Nicole Kaoudis <kaoudis@colorado.edu>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index f7d083bb3bd5..f4aa64160838 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -1108,21 +1108,14 @@ static void nvme_free_queue(struct nvme_queue *nvmeq)
 
 static void nvme_free_queues(struct nvme_dev *dev, int lowest)
 {
-        LLIST_HEAD(q_list);
-        struct nvme_queue *nvmeq, *next;
-        struct llist_node *entry;
         int i;
 
         for (i = dev->queue_count - 1; i >= lowest; i--) {
                 struct nvme_queue *nvmeq = dev->queues[i];
-                llist_add(&nvmeq->node, &q_list);
                 dev->queue_count--;
                 dev->queues[i] = NULL;
-        }
-        synchronize_rcu();
-        entry = llist_del_all(&q_list);
-        llist_for_each_entry_safe(nvmeq, next, entry, node)
                 nvme_free_queue(nvmeq);
+        }
 }
 
 /**