Re: [PATCH v4 1/3] RISC-V: Do not invoke SBI call if cpumask is empty

[Christoph Hellwig]

On Thu, Aug 22, 2019 at 12:51:49AM -0700, Atish Patra wrote:
> SBI calls are expensive. If cpumask is empty, there is no need to
> trap via SBI as no remote tlb flushing is required.
> 
> Signed-off-by: Atish Patra <atish.patra@xxxxxxx>

Looks good,

Reviewed-by: Christoph Hellwig <hch@xxxxxx>