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Wed, 11 Nov 2026 07:59:48 +0000 (GMT) Received: from li-7bb28a4c-2dab-11b2-a85c-887b5c60d769.ibm.com.com (unknown [9.124.213.92]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 11 Nov 2026 07:59:48 +0000 (GMT) From: Shrikanth Hegde To: linux-kernel@vger.kernel.org, yury.norov@gmail.com, linux-perf-users@vger.kernel.org Cc: sshegde@linux.ibm.com, mingo@kernel.org, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, tglx@kernel.org, sudeep.holla@kernel.org, linux@rasmusvillemoes.dk Subject: [PATCH 0/5] cpumask: Use cpumask_intersects* APIs where applicable Date: Wed, 11 Nov 2026 13:29:40 +0530 Message-ID: <20261111075945.3930230-1-sshegde@linux.ibm.com> X-Mailer: git-send-email 2.54.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: 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: _ILj8DNpx5AzId_t_Oc4DNupIN7b8Ztd X-Authority-Analysis: v=2.4 cv=PeVqFShd c=1 sm=1 tr=0 ts=6af4207b cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=N73upePAzneGQQU5UeIA:9 X-Proofpoint-GUID: azgE8Jl0FqBN9p062ATuk96YL8e-3OCJ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTExMDAzMCBTYWx0ZWRfX8NbA9j2GVon0 xjHQiJB7OQp2G+6UI4YSH8aUAcOcVGHYx2tTTDlTB7JHdMqbX1Ztp5HDGPx0U/BM6W4KWXr/khz 2bo3Z+n6oQRjN01txgSu2zkUQeFiQ1RbMF5XysiFCyRNffiEf6cHRp8yJQ1MQmWjsQHYKQYjgVf CWM9lrx1+vGmGZaKIiRKmrZUKXCfM15ad9kR9iOhQXtCg3d4VjaHUofZMaZv0odixymSS8UkOAe tHlXcdVNEYn9Vj2cFbkTHKB7cBuatHRRn9u8Xo0RvlKgRxPvmVabq5OT7AlevKMvYpg3N9r6zoN QBI8mMD9pc2vwxnSY0g4u3nTa43smQzEfzZcdJIX7CYkNVjLI8mvQLhWk08elbZInLwioLp7t4+ E0KU62IIemAzyz3KULn+VADQIepRS7BzyeFBBIK+gepfnV0wsL24vHFYzG/2KINDnjd6wdHB0xl kgr2MA/3vJgRifT+A4g== X-Proofpoint-Spam-Info: AW1haW4tMjYxMTExMDAzMCBTYWx0ZWRfXyAI4VYmVMIJU 8X4gUrCzC/SfDEAoQ5FbOGRniEybjq3S0xSw3cD8Es6cO0vm66iZ6XGUge996K4JtTWR6YX68E6 5Vudi/p8EKCgxKS5uHUU2e2cadqHIB4= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-11_02,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 suspectscore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 malwarescore=0 clxscore=1011 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611110030 It was observed while working on cpumask_intersects_and, check like below could use it instead. if (cpumask_first_and_and() < nr_cpu_ids) While there, did check the code for any such similar patterns of cpumask_any_and, cpumask_first_and and explicit loops where cpu found by these APIs are not being used. All those callsites instead can simply use cpumask_intersects. Note that few more places can use similar change. But, I have left them as is. drivers/net/ethernet/sfc/efx_channels.c+370 drivers/net/ethernet/sfc/siena/efx_channels.c+371 drivers/platform/x86/intel/uncore-frequency/uncore-frequency.c+153 Also, these patches can combined into three patches if that is easier for review/merge. I have kept it separate since they belong to different subsystems. Shrikanth Hegde (5): sched/rt: cpupri_find: Use cpumask_intersects where applicable cpu/hotplug: Use cpumask_intersects where applicable perf: Use cpumask_intersects where applicable cpuidle: Use cpumask_intersects_and where applicable arch_topology: Use cpumask_intersects where applicable drivers/base/arch_topology.c | 9 +-------- drivers/cpuidle/coupled.c | 4 ++-- kernel/cpu.c | 3 +-- kernel/events/core.c | 7 ++----- kernel/sched/cpupri.c | 2 +- 5 files changed, 7 insertions(+), 18 deletions(-) -- 2.52.0