Re: [PATCH v2 4/8] RISC-V: Allow hartid-to-cpuid function to fail.

[Christoph Hellwig]

On Tue, Jan 08, 2019 at 01:38:34AM -0800, Atish Patra wrote:
> It is perfectly okay to call riscv_hartid_to_cpuid for a
> hartid that is not mapped with an CPU id. It can happen
> if the calling functions retrieves the hartid from DT.
> However, that hartid was never brought online by the firmware
> or kernel for any reasons.
> 
> No need to BUG() in the above case. A negative error return
> is sufficient and the calling function should check for the
> return value always.
> 
> Signed-off-by: Atish Patra <atish.patra@xxxxxxx>

Looks fine (modulo the line length issues):

Reviewed-by: Christoph Hellwig <hch@xxxxxx>