Re: [PATCH v2 0/2] x86/topology: add bitmap_weight_from() and use it in topo_unit_count()

[Yury Norov]

Ping?

On Mon, Dec 22, 2025 at 02:11:36PM -0500, Yury Norov (NVIDIA) wrote:
> Currently the function open-codes the missing bitmap_weight_from() with
> a for-loop, which is known to be less effective. Add the helper and
> switch topo_unit_count() to using it.
> 
> v1: https://lore.kernel.org/all/20251214235437.244125-1-yury.norov@xxxxxxxxx/
> v2:
>  - rename 'nbits' to 'end' (Ingo);
>  - leverage bitmap_weight() in inline implementation;
>  - drop outline implementation;
>  - don't handle 'start >= end' case explititly, leave it to user.
> 
> Yury Norov (NVIDIA) (2):
>   bitmap: add bitmap_weight_from()
>   x86/topology: use bitmap_weight_from()
> 
>  arch/x86/kernel/cpu/topology.c |  8 ++------
>  include/linux/bitmap.h         | 30 ++++++++++++++++++++++++++++++
>  lib/test_bitmap.c              | 26 ++++++++++++++++++++++++++
>  3 files changed, 58 insertions(+), 6 deletions(-)
> 
> -- 
> 2.43.0