:: [ 12:13:36 ] :: [  BEGIN   ] :: Running 'stap -c sync --suppress-handler-errors -e 'probe ioscheduler.elv_add_request{println(elevator_name) exit()}''
semantic error: unresolved struct elevator_queue: operator '->' at /usr/share/systemtap/tapset/linux/ioscheduler.stp:155:65
        source:                                                 $rq->q->elevator->elevator_name)), "")
                                                                                ^
in expansion of macro: operator '@alternate' at /usr/share/systemtap/tapset/choose_defined.stpm:3:57
        source: ( @defined(@value_if_defined) ? (@value_if_defined) : (@alternate) )

I guess this is caused by linux commit:

commit 2e9bc3465ac54d282b855b073409c2c3a7d1ae00
Author: Christoph Hellwig <hch@lst.de>
Date:   Mon Sep 20 14:33:23 2021 +0200

    block: move elevator.h to block/
    
    Except for the features passed to blk_queue_required_elevator_features,
    elevator.h is only needed internally to the block layer.  Move the
    ELEVATOR_F_* definitions to blkdev.h, and the move elevator.h to
    block/, dropping all the spurious includes outside of that.