block: remove dead struc request->completion_data field
authorJens Axboe <axboe@kernel.dk>
Mon, 10 Jul 2023 16:23:05 +0000 (10:23 -0600)
committerJens Axboe <axboe@kernel.dk>
Mon, 10 Jul 2023 16:23:05 +0000 (10:23 -0600)
commitdc8cbb65dc17b0daebca84375d35ce54ff730762
tree45c8b4dce3a369faaded27b88697f3c23e48df86
parent2fb48d88e77f29bf9d278f25bcfe82cf59a0e09b
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