Re: [PATCH 1/4] rmap: introduce rmap_walk_locked()

["Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>]

On Wed, Feb 03, 2016 at 02:40:19PM -0800, Andrew Morton wrote:
> On Wed,  3 Feb 2016 18:14:16 +0300 "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> wrote:
> 
> > rmap_walk_locked() is the same as rmap_walk(), but caller takes care
> > about relevant rmap lock. It only supports anonymous pages for now.
> > 
> > It's preparation to switch THP splitting from custom rmap walk in
> > freeze_page()/unfreeze_page() to generic one.
> > 
> > ...
> >
> > +/* Like rmap_walk, but caller holds relevant rmap lock */
> > +int rmap_walk_locked(struct page *page, struct rmap_walk_control *rwc)
> > +{
> > +	/* only for anon pages for now */
> > +	VM_BUG_ON_PAGE(!PageAnon(page) || PageKsm(page), page);
> > +	return rmap_walk_anon(page, rwc, true);
> > +}
> 
> Should be rmap_walk_anon_locked()?

I leave interface open for further extension for file mappings, once it
will be needed. Interface is mirroring plain rmap_walk()

If you prefer to rename the function, I can do it too.

-- 
 Kirill A. Shutemov

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