From: Changbin Du Date: Thu, 16 Nov 2017 01:32:53 +0000 (-0800) Subject: mm: update comments for struct page.mapping X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=41710443f790b5f7f5305eba99dacce88e259f4c;p=linux.git mm: update comments for struct page.mapping struct page.mapping can be NULL or points to one object of type address_space, anon_vma or KSM private structure. Link: http://lkml.kernel.org/r/1506485067-15954-1-git-send-email-changbin.du@intel.com Signed-off-by: Changbin Du Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index c85f11dafd560..d1b8e8f97fc2c 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -48,8 +48,10 @@ 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. See + * PAGE_MAPPING_ANON and + * PAGE_MAPPING_KSM. */ void *s_mem; /* slab first object */ atomic_t compound_mapcount; /* first tail page */