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From: "mcermak at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug tapsets/28634] New: ioscheduler.stp broken with new kernel
 5.16.0-0.rc2
Date: Mon, 29 Nov 2021 12:32:12 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D28634

            Bug ID: 28634
           Summary: ioscheduler.stp broken with new kernel 5.16.0-0.rc2
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tapsets
          Assignee: systemtap at sourceware dot org
          Reporter: mcermak at redhat dot com
  Target Milestone: ---

:: [ 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:=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20
$rq->q->elevator->elevator_name)), "")
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=
=20=20=20=20
^
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.

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