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Mon, 18 May 2026 05:09:05 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 64I5921d46137600 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 18 May 2026 05:09:02 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 00B0F2004B; Mon, 18 May 2026 05:09:02 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DD19820049; Mon, 18 May 2026 05:08:56 +0000 (GMT) Received: from aboo.ibm.com.com (unknown [9.124.214.53]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 18 May 2026 05:08:56 +0000 (GMT) From: Aboorva Devarajan To: Madhavan Srinivasan , linuxppc-dev@lists.ozlabs.org Cc: Athira Rajeev , Aboorva Devarajan , Christophe Leroy , linux-kernel@vger.kernel.org, Sourabh Jain , Ritesh Harjani , Shrikanth Hegde Subject: [PATCH 0/3] powerpc: fix preempt_count imbalances in perf and kexec paths Date: Mon, 18 May 2026 10:38:52 +0530 Message-ID: <20260518050855.1147242-1-aboorvad@linux.ibm.com> X-Mailer: git-send-email 2.54.0 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-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: BKRp9xprexdhaYIaI9sIJV6w_gdlKsBr X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE4MDA0NiBTYWx0ZWRfX9DY1nPBL0CBr We5C0hjK71u9A1sU/E6AMYz6e0Izifk6EC2s6+527g+RQZPQ3ZnnfOinn9OyTkmVoYI/5PpkEPw FSFJEFRx4SRlKwWjh7MnvLizT2ztSlpeY9SPBG7EUJvve1fKElON3UNZ/WVtLkXTsDwmYEQwXK9 I0hT7ga3wKNjRklJF21/oDY6WO/G2e+eVe0NQREJuApcuqoKTzoswQDbiNCZaXHn1sKAk/JfIY/ j7GPgYQzvjYduAyE2WCCjvKfpMjByq0C3UGI87uPAyhJ0sEnJQ5cos89Nme1q2FoCACGUqMGXNj 3dBDxEHeZ9SRVkjUyEGVku+KhaDDRWzNXjuQm9QW64P0eKfxVhc9ZOEvPE5/pGO2B3FacR+GDEQ LmxCgny1argGUQVkOBBPOLDW/5eQiFHubPZEnZAgnlSxqqy85zRu4GCs4pVlZ1Qg4u48kYfwi+/ Os2+0bNUcructJeJn/w== X-Proofpoint-GUID: 39FXVvMyiDiZO3dnkaexYoHMuQ_w10ei X-Authority-Analysis: v=2.4 cv=apyCzyZV c=1 sm=1 tr=0 ts=6a0a9ef2 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=i9BbGgCnHC-T_McXfeMA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-18_01,2026-05-15_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 suspectscore=0 adultscore=0 spamscore=0 phishscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605180046 Hi all, This patch series fixes some minor preempt_count bookkeeping issues in arch/powerpc/ found during a preemption leak audit prompted by the lazy/full preemption model changes. These are get_cpu/put_cpu and get_cpu_var/put_cpu_var pairing errors that leave preempt_count incorrectly elevated or underflowed. Please let me know your comments. Thanks, Aboorva Aboorva Devarajan (3): powerpc/perf: fix preempt count underflow in fsl_emb_pmu_del powerpc/powernv: fix preempt count leak in pnv_kexec_wait_secondaries_down powerpc/kexec: fix double get_cpu() imbalance in kexec_prepare_cpus arch/powerpc/kexec/core_64.c | 15 ++++++++------- arch/powerpc/perf/core-fsl-emb.c | 3 ++- arch/powerpc/platforms/powernv/setup.c | 2 +- 3 files changed, 11 insertions(+), 9 deletions(-) -- 2.54.0