[PATCH v4 01/12] mm: Add is_migrate_cma_page
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STALE3728d
From: Kees Cook <hidden>
Date: 2016-07-20 20:27:24
Also in:
linux-arch, linux-arm-kernel, linux-mm, lkml, sparclinux
Subsystem:
memory management - core, memory management - mglru (multi-gen lru), the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
Revision v4 of 4 in this series.
Revisions (4)
- v1 [diff vs current]
- v2 [diff vs current]
- v3 [diff vs current]
- v4 current
From: Laura Abbott <redacted> 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 <redacted> Signed-off-by: Kees Cook <redacted> --- include/linux/mmzone.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 02069c23486d..c8478b29f070 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) \
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2.7.4