[PATCH 4/4] blk-mq: delete unused completion_data in struct request

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From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>

After global search, I found "completion_data" in struct request
is not used anywhere, so just clean it up by the way.

Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
---
 include/linux/blk-mq.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 96644d6f8d18..ab790eba5fcf 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -158,13 +158,11 @@ struct request {
 
 	/*
 	 * The rb_node is only used inside the io scheduler, requests
-	 * are pruned when moved to the dispatch queue. So let the
-	 * completion_data share space with the rb_node.
+	 * are pruned when moved to the dispatch queue.
 	 */
 	union {
 		struct rb_node rb_node;	/* sort/lookup */
 		struct bio_vec special_vec;
-		void *completion_data;
 	};
 
 	/*
-- 
2.39.2




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