Subject: Re: [RFC PATCH 09/10] POWERPC: smp: remove call to ipi_call_lock()/ipi_call_unlock()

From: Peter Zijlstra <[email-masked]>
Date: Sat, 16 Jun 2012 19:30:58 +0200

On Sat, 2012-06-16 at 09:32 -0700, Paul E. McKenney wrote:
> However, there is an effort to get rid of stop_machine() from the
> CPU-down path...  So something else will be needed.=20

Elsewhere in this thread I mentioned we could do a synchronize_sched().
I think that covers most of what stop-machine is doing these days.