[tip:sched/core] sched/core: Add debugging code to catch missing update_rq_clock() calls

[Mike Galbraith]

On Thu, 2017-02-02 at 16:55 +0100, Peter Zijlstra wrote:
> On Tue, Jan 31, 2017 at 10:22:47AM -0700, Ross Zwisler wrote:
> > On Tue, Jan 31, 2017 at 4:48 AM, Mike Galbraith <efault at gmx.de>
> > wrote:
> > > On Tue, 2017-01-31 at 16:30 +0530, Sachin Sant wrote:
> 
> 
> Could some of you test this? It seems to cure things in my (very)
> limited testing.

Hotplug stress gripe is gone here.

	-Mike