Re: Re: [PATCH v18 01/14] mm/page_ext: Export lookup_page_ext() to GPL modules

SeongJae Park
2020-07-13T12:23:04Z

On Mon, 13 Jul 2020 15:08:42 +0300 Mike Rapoport <rppt@kernel.org> wrote:

> Hi,
>
> On Mon, Jul 13, 2020 at 10:41:31AM +0200, SeongJae Park wrote:
> > From: SeongJae Park <sjpark@amazon.de>
> >
> > This commit exports 'lookup_page_ext()' to GPL modules. It will be used
> > by DAMON in following commit for the implementation of the region based
> > sampling.
>
> Maybe I'm missing something, but why is DAMON a module?

I made it loadable just for easier adoption from downstream kernels. I could
drop the module build support if asked.

Thanks,
SeongJae Park

>
> > Signed-off-by: SeongJae Park <sjpark@amazon.de>
> > Reviewed-by: Leonard Foerster <foersleo@amazon.de>
> > Reviewed-by: Varad Gautam <vrd@amazon.de>
> > ---
> > mm/page_ext.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/mm/page_ext.c b/mm/page_ext.c
> > index a3616f7a0e9e..9d802d01fcb5 100644
> > --- a/mm/page_ext.c
> > +++ b/mm/page_ext.c
> > @@ -131,6 +131,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
> > MAX_ORDER_NR_PAGES);
> > return get_entry(base, index);
> > }
> > +EXPORT_SYMBOL_GPL(lookup_page_ext);
> >
> > static int __init alloc_node_page_ext(int nid)
> > {
> > --
> > 2.17.1
> >
>
> --
> Sincerely yours,
> Mike.