Re: [PATCH 2/4] block/part_stat: use __this_cpu_add() instead of access by smp_processor_id()

[Christoph Hellwig]

On Mon, May 04, 2020 at 06:02:28PM +0300, Konstantin Khlebnikov wrote:
> Then all per-cpu macro should work as is for UP case too.
> Surprisingly arrow operator (struct->filed) works for arrays too =)
> 
> 
> Inlining per-cpu structures should be good for tiny UP systems.
> Especially if this could be done by few macro only in three places:
> definition, allocating and freeing.

Or we could just use the percpu ops always, which is what most
users do.  I never really go the UP microoptmization here.