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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>
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1 changed files with 3 additions and 3 deletions
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@ -158,13 +158,13 @@ struct request {
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/*
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* The rb_node is only used inside the io scheduler, requests
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* are pruned when moved to the dispatch queue. So let the
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* completion_data share space with the rb_node.
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* are pruned when moved to the dispatch queue. special_vec must
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* only be used if RQF_SPECIAL_PAYLOAD is set, and those cannot be
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* insert into an IO scheduler.
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*/
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union {
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struct rb_node rb_node; /* sort/lookup */
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struct bio_vec special_vec;
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void *completion_data;
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};
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/*
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