diff options
| author | Laura Abbott <labbott@redhat.com> | 2016-07-19 15:00:04 -0700 |
|---|---|---|
| committer | Sami Tolvanen <samitolvanen@google.com> | 2016-09-06 15:53:07 +0000 |
| commit | 1e701cdc5bbce1f5561ee25ff8709a18dc0b2282 (patch) | |
| tree | 442698428c9b0953a849d28df4fa329a2b3b6aec | |
| parent | 5f1b3400f0ccc2368dc444b5d9a7c93be2e700da (diff) | |
UPSTREAM: mm: Add is_migrate_cma_page
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@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Change-Id: I1f9aa13d8d063038fa70b93282a836648fbb4f6d
(cherry picked from commit 7c15d9bb8231f998ae7dc0b72415f5215459f7fb)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
| -rw-r--r-- | include/linux/mmzone.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index e23a9e704536..bab4053fb795 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -65,8 +65,10 @@ enum { #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) \ |