Re: One question about API cpumask_setall()

[Yury Norov]

On Tue, Jul 28, 2026 at 04:16:27PM +0800, Bibo Mao wrote:
> Hi,
> 
> I am preparing to use API cpumask_setall() for TLB flush on LoongArch KVM
> side. There are cpumask_test_and_clear_cpu/cpumask_setall() APIs, it seems
> that API cpumask_setall() does not support atomic operation.
> 
> Do you think it is reasonable to add new API similar with cpumask_setall()
> which supports atomic operation?

Maybe reasonable, but it's impossible. cpumask is a bitmap, which in
turn is an array of unsigned longs. There's no atomic operations on
arrays.

Thanks,
Yury