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Fri, 09 Jan 2026 06:49:25 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 6096nLdO52035958 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 9 Jan 2026 06:49:21 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C403420043; Fri, 9 Jan 2026 06:49:21 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D46B920040; Fri, 9 Jan 2026 06:49:19 +0000 (GMT) Received: from li-7bb28a4c-2dab-11b2-a85c-887b5c60d769.ibm.com.com (unknown [9.39.17.37]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 9 Jan 2026 06:49:19 +0000 (GMT) From: Shrikanth Hegde To: maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, rostedt@goodmis.org, mhiramat@kernel.org Cc: sshegde@linux.ibm.com, chleroy@kernel.org, riteshh@linux.ibm.com, linux-kernel@vger.kernel.org, hbathini@linux.ibm.com Subject: [PATCH 0/1] powerpc: Fix kuap warnings Date: Fri, 9 Jan 2026 12:19:16 +0530 Message-ID: <20260109064917.777587-1-sshegde@linux.ibm.com> X-Mailer: git-send-email 2.51.0 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTA5MDA0MiBTYWx0ZWRfXzuQxuhDDO5PA z28aAM/MDqcxPTCV34DRw1bj3pGXcff4UthkypslHavZNE94eObUulertBYgEa1kJlJChALaQT+ J8RsnbFtL97Q75nVZAbL47q/e5b/sben85MRhSjdkFWNQoKhX1t2UvCL2vWSdq5FUPtPxUVaG21 WWAgsyZ3BrHjme18WMa+SCqclkP44vL7iDAFcfzFTtxG00FuHb1v+EnM54QGCmAdgGMouBriHBl 4u5EO9QP2a+8Ap2Fvqt5zVUCVW+qpYQEmLKDI27QKF2+JlWbU4q9qvo/ioUu/ol4ISD/TU8Iipz BdBPf/1+nuJBiaFCuq5IjJaO8nnYzUg73f5cLtrzAw9a2lCt06YtmZEjhSRVF3VCmKTiYS9rITB fir3I4Z5txkZ+XhzwHre3G5vtL4mn4XGPOiNe23BFBdEwxzi4Y5jSa6r0XNnYUpXZnf5hseu2G/ hv2x/pqLfW/WSsbklLQ== X-Proofpoint-GUID: DFUX0v5V_-JluZu-0HxgScJT_cTnz0_M X-Proofpoint-ORIG-GUID: DFUX0v5V_-JluZu-0HxgScJT_cTnz0_M X-Authority-Analysis: v=2.4 cv=AOkvhdoa c=1 sm=1 tr=0 ts=6960a4f6 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=ihlndRiG9AZkRag6FYgA:9 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=2026-01-09_02,2026-01-08_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 adultscore=0 malwarescore=0 impostorscore=0 clxscore=1015 suspectscore=0 bulkscore=0 phishscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2512120000 definitions=main-2601090042 Recently stumbled upon these kuap warnings. This happens with preempt=full/lazy kernel with function tracing enabled. What irked me was kernel compilation was getting failed when i had tracing enabled. It doesn't fail everytime. While running stress-ng memory class it threw same warnings. So that helped to narrow it down. So one possible way is to disable tracing for these enter/exit vmx_usercopy. That seems to fix the bug/warnings. But that will make them as non trace-able. If there is a better way to fix these warning while keeping them as trace-able, please let me know. Anyone with insights on amr, vmx and tracing, please advise. Shrikanth Hegde (1): powerpc: Fix kuap warnings on lazy/full preemption with tracing arch/powerpc/kernel/process.c | 10 +++++----- arch/powerpc/lib/vmx-helper.c | 4 ++-- 2 files changed, 7 insertions(+), 7 deletions(-) -- 2.47.3