Re: [PATCH v2 3/7] ACPI / processor: Introduce invalid_logical_cpuid()

[Rafael J. Wysocki]

On Tuesday, May 05, 2015 12:15:13 PM Sudeep Holla wrote:
> 
> On 05/05/15 03:46, Hanjun Guo wrote:
> > In ACPI processor drivers, we use direct comparisons of cpu logical
> > id with -1 which are error prone in case logical cpuid is accidentally
> > assinged an error code and prevents us from returning an error-encoding
> > cpuid directly in some cases.
> >
> > So introduce invalid_logical_cpuid() to identify cpu with invalid
> > logical cpu num, then it will be used to replace the direct comparisons
> > with -1.
> >
> 
> Ah, OK I see that this fixes the issue I raised in PATCH 1/7, so I think
> you need to reorder this and 1/7 patch IMO.

Well, comparing an unsigned int with -1 is not technically invalid (although it
involves an implicit type conversion), but yes, Hanjun, please reorder the
patches.


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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