Re: [PATCH] x86/platform/uv: Dont use smp_processor_id while preemptable

[Dave Hansen]

On 5/20/22 13:37, Mike Travis wrote:
> To avoid a "BUG: using smp_processor_id() in preemptible" debug
> warning message, disable preemption around use of the processor id.

I'm sure this gets rid of the warning.  But, could you please take a
quick look at the callers and ensure that they can handle if this read
comes from another CPU?

In other words, what would actually go wrong if uv_read_rtc() got
preempted in this region?  What would this actually fix?