Re: [PATCH 06/13] locking/qspinlock: merge qspinlock_paravirt.h into qspinlock.c

[Peter Zijlstra]

On Tue, Jul 05, 2022 at 07:20:37PM +0200, Peter Zijlstra wrote:
> On Tue, Jul 05, 2022 at 12:38:13AM +1000, Nicholas Piggin wrote:
> > There isn't much reason to keep these separate.
> 
> The reason was so that other paravirt implementations could be added.
> 
> The CNA thing was also implemented this way...

Also, (TIL) s390 seems to have a copy of all this:

  b96f7d881ad9 ("s390/spinlock: introduce spinlock wait queueing")

it might be nice if it were possible to fold that back into this with a
different paravirt implementation; but I've not looked at it in any
great detail yet.