From: Changbin Du <changbin.du@xxxxxxxxx> The struct page.mapping can NULL or points to one object of type address_space, anon_vma or KSM private structure. Signed-off-by: Changbin Du <changbin.du@xxxxxxxxx> --- include/linux/mm_types.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 46f4ecf5..8dd6cb3 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -47,8 +47,8 @@ struct page { * inode address_space, or NULL. * If page mapped as anonymous * memory, low bit is set, and - * it points to anon_vma object: - * see PAGE_MAPPING_ANON below. + * it points to anon_vma object + * or KSM private structure. */ void *s_mem; /* slab first object */ atomic_t compound_mapcount; /* first tail page */ -- 2.7.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>