[PATCH] lib/group_cpus.c: avoid to acquire cpu hotplug lock in group_cpus_evenly

[Ming Lei]

Hello Thomas and Guys,

On Fri, Aug 11, 2023 at 06:59:25PM +0800, Guangwu Zhang wrote:
> Hi Ming,
> I don't find any IO block after apply the patch.
> 
> Tested-by: Guangwu Zhang <guazhang at redhat.com>

Can you take a look at this fix? And this one solves a couple
of nvme io hang report in case of cpu hotplug & reset involved.

Thanks,
Ming