Re: [PATCH v5 0/1] MR824: ntoskrnl: Implement KeGetCurrentProcessorNumberEx

[Jinoh Kang (＠iamahuman)]

> You should only call `NtGetCurrentProcessorNumber()` once. Otherwise, the processor number can change if the thread is preempted and then re-scheduled to another processor. This leads to inconsistent values between the return value and the `process_number->Number` output.

It's not that `KeGetCurrentProcessorNumberEx()` will be highly useful, since the driver can't block scheduling by raising IRQL to DISPATCH_LEVEL.  Still, it's better to at least return consistent values even if they are stale.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/824#note_8782