On Tue, Jul 19, 2016 at 3:00 PM, Laura Abbott <labbott@xxxxxxxxxx> wrote: > Code such as hardened user copy[1] needs a way to tell if a > page is CMA or not. Add is_migrate_cma_page in a similar way > to is_migrate_isolate_page. > > [1]http://article.gmane.org/gmane.linux.kernel.mm/155238 > > Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx> Great, thanks! > --- > Here's an explicit patch, slightly different than what I posted before. It can > be kept separate or folded in as needed. Assuming there's no objection, I'll add it to my tree and use the new macro. -Kees > --- > include/linux/mmzone.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h > index 02069c2..c8478b2 100644 > --- a/include/linux/mmzone.h > +++ b/include/linux/mmzone.h > @@ -68,8 +68,10 @@ extern char * const migratetype_names[MIGRATE_TYPES]; > > #ifdef CONFIG_CMA > # define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) > +# define is_migrate_cma_page(_page) (get_pageblock_migratetype(_page) == MIGRATE_CMA) > #else > # define is_migrate_cma(migratetype) false > +# define is_migrate_cma_page(_page) false > #endif > > #define for_each_migratetype_order(order, type) \ > -- > 2.7.4 > -- Kees Cook Chrome OS & Brillo Security -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
