Re: [PATCH 0/5] cpumask: Use cpumask_intersects* APIs where applicable

[Yury Norov]

On Wed, Nov 11, 2026 at 01:29:40PM +0530, Shrikanth Hegde wrote:
> 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
 
Reviewed-by: Yury Norov <ynorov@xxxxxxxxxx>

>  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
>