From dc8cbb65dc17b0daebca84375d35ce54ff730762 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 10 Jul 2023 10:23:05 -0600
Subject: [PATCH] block: remove dead struc request->completion_data field
It's no longer used. While in there, also update the comment as to why
it can coexist with the rb_node.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
include/linux/blk-mq.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 2b7fb8e87793c..b96e00499f9ee 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -158,13 +158,13 @@ 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. special_vec must
+ * only be used if RQF_SPECIAL_PAYLOAD is set, and those cannot be
+ * insert into an IO scheduler.
*/
union {
struct rb_node rb_node; /* sort/lookup */
struct bio_vec special_vec;
- void *completion_data;
};
/*
--
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