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Date:   Mon, 4 May 2020 07:03:17 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc:     linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
        Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 2/4] block/part_stat: use __this_cpu_add() instead of
 access by smp_processor_id()
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> +#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@lst.de>