[mainline]Warning while building tools/perf

[Venkat Rao Bagalkote <venkat88@linux.ibm.com>]

Hello,


I am seeing a new build warning while building tools/perf on the 
mainline kernel, with base:

commit 02ddfb981de88a2c15621115dd7be2431252c568 (HEAD -> master, 
origin/master, origin/HEAD)
Merge: 30e268185e59 b0b7ee3b574a
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Thu Apr 24 13:01:31 2025 -0700

     Merge tag 'scsi-fixes' of 
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

     Pull SCSI fixes from James Bottomley:
      "The single core change is an obvious bug fix (and falls within the LF
       guidelines for patches from sanctioned entities). The other driver
       changes are a bit larger but likewise pretty obvious"

     * tag 'scsi-fixes' of 
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
       scsi: mpi3mr: Add level check to control event logging
       scsi: ufs: core: Add NULL check in 
ufshcd_mcq_compl_pending_transfer()
       scsi: core: Clear flags for scsi_cmnd that did not complete
       scsi: ufs: Introduce quirk to extend PA_HIBERN8TIME for UFS devices
       scsi: ufs: qcom: Add quirks for Samsung UFS devices
       scsi: target: iscsi: Fix timeout on deleted connection
       scsi: mpi3mr: Reset the pending interrupt flag
       scsi: mpi3mr: Fix pending I/O counter
       scsi: ufs: mcq: Add NULL check in ufshcd_mcq_abort()


Git Bisect is pointing to below commit as first bad commit.


a940e0a685575424d33324ec7f0089045249de0a is the first bad commit
commit a940e0a685575424d33324ec7f0089045249de0a
Author: Stefano Garzarella <sgarzare@redhat.com>
Date:   Mon Mar 3 09:52:37 2025 +0100

     vhost: fix VHOST_*_OWNER documentation

     VHOST_OWNER_SET and VHOST_OWNER_RESET are used in the documentation
     instead of VHOST_SET_OWNER and VHOST_RESET_OWNER respectively.

     To avoid confusion, let's use the right names in the documentation.
     No change to the API, only the documentation is involved.

     Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
     Message-Id: <20250303085237.19990-1-sgarzare@redhat.com>
     Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

  include/uapi/linux/vhost.h | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)


Upon reverting the above commit, warning is not seen.


Bisect log:


git bisect start
# status: waiting for both good and bad commits
# good: [9c32cda43eb78f78c73aee4aa344b777714e259b] Linux 6.15-rc3
git bisect good 9c32cda43eb78f78c73aee4aa344b777714e259b
# status: waiting for bad commit, 1 good commit known
# bad: [02ddfb981de88a2c15621115dd7be2431252c568] Merge tag 'scsi-fixes' 
of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect bad 02ddfb981de88a2c15621115dd7be2431252c568
# good: [cc0dec3f659d19805fcaf8822204137c9f27a912] Merge branch 
'net-stmmac-fix-timestamp-snapshots-on-dwmac1000'
git bisect good cc0dec3f659d19805fcaf8822204137c9f27a912
# bad: [0251ddbffbeb213f0f74ef94b2cacce580eb8d76] Merge tag 'for_linus' 
of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
git bisect bad 0251ddbffbeb213f0f74ef94b2cacce580eb8d76
# good: [bc3372351d0c8b2726b7d4229b878342e3e6b0e8] Merge tag 
'for-6.15-rc3-tag' of 
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
git bisect good bc3372351d0c8b2726b7d4229b878342e3e6b0e8
# bad: [fbd3039a64b01b769040677c4fc68badeca8e3b2] virtio_console: fix 
missing byte order handling for cols and rows
git bisect bad fbd3039a64b01b769040677c4fc68badeca8e3b2
# bad: [a940e0a685575424d33324ec7f0089045249de0a] vhost: fix 
VHOST_*_OWNER documentation
git bisect bad a940e0a685575424d33324ec7f0089045249de0a
# good: [16c22c56d4282584742022a37d4f79a46ca6094a] virtio_pci: Use self 
group type for cap commands
git bisect good 16c22c56d4282584742022a37d4f79a46ca6094a
# first bad commit: [a940e0a685575424d33324ec7f0089045249de0a] vhost: 
fix VHOST_*_OWNER documentation


If you happen to fix this, please add below tag.


Reported-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>


Regards,

Venkat.