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

[Christoph Hellwig]

> +#define __part_stat_add(part, field, addnd)				\
> +	(part_stat_get(part, field) += (addnd))

Just open coding part_stat_get for the UP side would seems a little
easier to read.

Otherwise this looks good:

Reviewed-by: Christoph Hellwig <hch@xxxxxx>