Re: [PATCH 41/54] arch/x86: replace cpumask_weight with cpumask_weight_eq where appropriate

[Peter Zijlstra]

On Sun, Jan 23, 2022 at 10:39:12AM -0800, Yury Norov wrote:
> smpboot code in somw places calls cpumask_weight() to compare the weight
> of cpumask with a given number. We can do it more efficiently with
> cpumask_weight_eq() because conditional cpumask_weight may stop traversing
> the cpumask earlier, as soon as condition is met.

Why use a more complicated API for code that has no performance
requirements?

>From where I'm sitting this is a net negative for making the code harder
to read.