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Thu, 1 Jan 2026 05:20:03 +0000 (GMT) Message-ID: <193bd91f-d6d7-43e4-8d9b-308908717b68@linux.ibm.com> Date: Thu, 1 Jan 2026 10:50:02 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-GB To: Linux Next Mailing List , LKML , Peter Zijlstra , Ingo Molnar , Madhavan Srinivasan , Stephen Rothwell From: Venkat Rao Bagalkote Subject: [next-20251219]Build Failure on IBM Power system Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: kuoOx2TSRiIz5u9zg3bU6jdyOJ0QgNqh X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTAxMDA0NiBTYWx0ZWRfX/Ede+1yZ4rmi 3se2Vp+7zlyBLZF0gIgHKDse6yABCrsYM1iPB57VuBnMu/e+afY2zUZbrkLCmGw7TJDQ8otnB1j c7II7sMbQVkyESMMbXCyewBszHirtUPcqSZ3XGkCw6PuLqdVUaaq+Cb0wuEKOkO7TB76rCYaiRK Q0uGON5BHnb5ZpuFaYwbyuRcPAvqMzNPVHY1Gn7j11p89MQOoJeipvRPtZO6Kv4iC3te4jsLX0s s5IH2SnbYuVQHs38W7itjEiFfe6axi1P8oIAvSrfI2JEjHe0+gIiqG8l0EaS4q7yosQWV1E23+3 ZVO7Mu6OGPmJNBtZhPrdrwvs0H+dcWFXIdkves1vsKhbQexqTr8aYA2hSCHiMW9PJut9/GpgH3c likxDs6FS4CPjRLLAeZ4MhpSSHNWYc3+R0CsixkaqRHXe8dIHVoScezIIhPt/xWeq7W1OWcr9oQ KyS33N7iBe6m6sV+WHg== X-Authority-Analysis: v=2.4 cv=AN8t5o3d c=1 sm=1 tr=0 ts=69560407 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=e5mUnYsNAAAA:8 a=JfrnYn6hAAAA:8 a=VnNF1IyMAAAA:8 a=CI-9MVhQOQwJVvpQJMkA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=Vxmtnl_E_bksehYqCbjh:22 a=1CNFftbPRP8L7MoqJWF3:22 X-Proofpoint-GUID: kuoOx2TSRiIz5u9zg3bU6jdyOJ0QgNqh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-01_02,2025-12-31_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 impostorscore=0 adultscore=0 suspectscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2512120000 definitions=main-2601010046 Greetings!!! IBM CI has reported a build failure on next-20251219 build. Build Failure: cc1: some warnings being treated as errors make[4]: *** [scripts/Makefile.build:287: kernel/sched/build_policy.o] Error 1 make[4]: *** Waiting for unfinished jobs.... make[3]: *** [scripts/Makefile.build:556: kernel/sched] Error 2 make[3]: *** Waiting for unfinished jobs.... make[2]: *** [scripts/Makefile.build:556: kernel] Error 2 make[2]: *** Waiting for unfinished jobs.... IBM CI has bisected this issue to below commit. 5d1f0b2f278eb55aebe29210fbc8f352c53497d6 is the first bad commit commit 5d1f0b2f278eb55aebe29210fbc8f352c53497d6 Author: Peter Zijlstra Date:   Wed Dec 10 09:06:50 2025 +0100 Bisection Logs: #git bisect log git bisect log git bisect start # status: waiting for both good and bad commits # good: [8f0b4cce4481fb22653697cced8d0d04027cb1e8] Linux 6.19-rc1 git bisect good 8f0b4cce4481fb22653697cced8d0d04027cb1e8 # status: waiting for bad commit, 1 good commit known # bad: [cc3aa43b44bdb43dfbac0fcb51c56594a11338a8] Add linux-next specific files for 20251219 git bisect bad cc3aa43b44bdb43dfbac0fcb51c56594a11338a8 # good: [600a692707acda49434d6c2c03dda20f46e09749] Merge branch 'libcrypto-next' of https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git git bisect good 600a692707acda49434d6c2c03dda20f46e09749 # good: [816a7181ac38fd22243edb557537b2aecb9eeb76] Merge branch 'drm-xe-next' of https://gitlab.freedesktop.org/drm/xe/kernel.git git bisect good 816a7181ac38fd22243edb557537b2aecb9eeb76 # good: [7157d55093613cf905cfd665772eae35d5c388f0] Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git git bisect good 7157d55093613cf905cfd665772eae35d5c388f0 # bad: [52af2cfd69d264f1a370693966acf5d96943add8] Merge branch 'extcon-next' of https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon.git git bisect bad 52af2cfd69d264f1a370693966acf5d96943add8 # bad: [502068d3b65cc8695f8da83a7f19c90805c958ca] next-20251217/tip git bisect bad 502068d3b65cc8695f8da83a7f19c90805c958ca # bad: [c06f166058309936567065e737f6f5d9609a1a87] Merge branch into tip/master: 'sched/core' git bisect bad c06f166058309936567065e737f6f5d9609a1a87 # good: [e2292f5c21542354246687d8e3e48a58b046e27b] Merge branch into tip/master: 'irq/msi' git bisect good e2292f5c21542354246687d8e3e48a58b046e27b # good: [fb9a7458e508ef1beae8d80ee40c2cd1b5b45f3a] sched/fair: Clean up comments in 'struct cfs_rq' git bisect good fb9a7458e508ef1beae8d80ee40c2cd1b5b45f3a # good: [527a521029c3edd38fb9fc96cd58e3fd7393d28e] sched/fair: Sort out 'blocked_load*' namespace noise git bisect good 527a521029c3edd38fb9fc96cd58e3fd7393d28e # good: [7ac422cf7b16ec524bcd8e017459e328a4103f63] perf/x86/intel/cstate: Add Diamond Rapids support git bisect good 7ac422cf7b16ec524bcd8e017459e328a4103f63 # bad: [5d1f0b2f278eb55aebe29210fbc8f352c53497d6] sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*() git bisect bad 5d1f0b2f278eb55aebe29210fbc8f352c53497d6 # first bad commit: [5d1f0b2f278eb55aebe29210fbc8f352c53497d6] sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*() If you happen to fix this issue, please add below tag. Reported-by: Venkat Rao Bagalkote Regards, Venkat.