Re: [PATCH v2 1/3] mm/mmu_notifier: use structure for invalidate_range_start/end callback

[Jan Kara]

On Wed 05-12-18 11:40:52, Jerome Glisse wrote:
> On Wed, Dec 05, 2018 at 05:35:20PM +0100, Jan Kara wrote:
> > On Wed 05-12-18 00:36:26, jglisse@xxxxxxxxxx wrote:
> > > diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
> > > index 5119ff846769..5f6665ae3ee2 100644
> > > --- a/mm/mmu_notifier.c
> > > +++ b/mm/mmu_notifier.c
> > > @@ -178,14 +178,20 @@ int __mmu_notifier_invalidate_range_start(struct mm_struct *mm,
> > >  				  unsigned long start, unsigned long end,
> > >  				  bool blockable)
> > >  {
> > > +	struct mmu_notifier_range _range, *range = &_range;
> > 
> > Why these games with two variables?
> 
> This is a temporary step i dediced to do the convertion in 2 steps,
> first i convert the callback to use the structure so that people
> having mmu notifier callback only have to review this patch and do
> not get distracted by the second step which update all the mm call
> site that trigger invalidation.
> 
> In the final result this code disappear. I did it that way to make
> the thing more reviewable. Sorry if that is a bit confusing.

Aha, right. Thanks for clarification. You can add:

Acked-by: Jan Kara <jack@xxxxxxx>

								Honza
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR