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Date: Tue, 14 Feb 2017 10:39:46 +0100
From: Peter Zijlstra <peterz@infradead.org>
To: Waiman Long <longman@redhat.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
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Subject: Re: [PATCH v2] x86/paravirt: Don't make vcpu_is_preempted() a
 callee-save function
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On Mon, Feb 13, 2017 at 05:34:01PM -0500, Waiman Long wrote:
> It is the address of &steal_time that will exceed the 32-bit limit.

That seems extremely unlikely. That would mean we have more than 4G
worth of per-cpu variables declared in the kernel.