On Mon, Jun 29, 2020 at 09:22:27AM -0700, Ira Weiny wrote:
> On Mon, Jun 29, 2020 at 04:19:53PM +0100, Matthew Wilcox wrote:
> > static inline void set_compound_order(struct page *page, unsigned int order)
> > {
> > page[1].compound_order = order;
> > + page[1].compound_nr = 1U << order;
> ^^^
> 1UL?
>
> Ira
>
> > +++ b/include/linux/mm_types.h
> > @@ -134,6 +134,7 @@ struct page {
> > unsigned char compound_dtor;
> > unsigned char compound_order;
> > atomic_t compound_mapcount;
> > + unsigned int compound_nr; /* 1 << compound_order */
^^^^^^^^^^^^
No
