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block: remove dead struc request->completion_data field

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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>
This commit is contained in:
Jens Axboe 2023-07-10 10:23:05 -06:00
parent 2fb48d88e7
commit dc8cbb65dc
1 changed files with 3 additions and 3 deletions
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6
include/linux/blk-mq.h
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@ -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;
};
/*