On 05/04/2015 10:46 PM, 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.
Which is exactly what Xen code does (xen_pcpu_id() and xen_hotadd_cpu()). And patch 4/7 fixes this.
-boris
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.
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