From: Shrikanth Hegde <sshegde@linux.ibm.com>
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 [thread overview]
Message-ID: <20261111075945.3930230-1-sshegde@linux.ibm.com> (raw)
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
next reply other threads:[~2026-11-11 8:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-11 7:59 Shrikanth Hegde [this message]
2026-11-11 7:59 ` [PATCH 1/5] sched/rt: cpupri_find: Use cpumask_intersects " Shrikanth Hegde
2026-11-11 7:59 ` [PATCH 2/5] cpu/hotplug: " Shrikanth Hegde
2026-11-11 7:59 ` [PATCH 3/5] perf: " Shrikanth Hegde
2026-11-11 7:59 ` [PATCH 4/5] cpuidle: Use cpumask_intersects_and " Shrikanth Hegde
2026-11-11 7:59 ` [PATCH 5/5] arch_topology: Use cpumask_intersects " Shrikanth Hegde
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