From: Yicong Yang Date: Tue, 10 Dec 2024 14:15:17 +0000 (+0800) Subject: drivers/perf: hisi: Don't update the associated_cpus on CPU offline X-Git-Tag: v6.14-rc1~198^2^2~16 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f2368a209a713267b68f7a4906a5012a29925410;p=thirdparty%2Fkernel%2Flinux.git drivers/perf: hisi: Don't update the associated_cpus on CPU offline Event will be scheduled on CPU of hisi_pmu::on_cpu which is selected from the intersection of hisi_pmu::associated_cpus and online CPUs. So the associated_cpus don't need to be maintained with online CPUs. This will save one update operation if one associated CPU is offlined. Signed-off-by: Yicong Yang Link: https://lore.kernel.org/r/20241210141525.37788-3-yangyicong@huawei.com Signed-off-by: Will Deacon --- diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c index 749d336259808..8c404f8b3f39d 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c @@ -492,9 +492,6 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) node); unsigned int target; - if (!cpumask_test_and_clear_cpu(cpu, &hisi_pmu->associated_cpus)) - return 0; - /* Nothing to do if this CPU doesn't own the PMU */ if (hisi_pmu->on_cpu != cpu) return 0;