diff options
Diffstat (limited to 'include/linux/page_ext.h')
| -rw-r--r-- | include/linux/page_ext.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index 2ccc8b414e5c..61c0f05f9069 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -10,6 +10,21 @@ struct page_ext_operations { #ifdef CONFIG_PAGE_EXTENSION /* + * page_ext->flags bits: + * + * PAGE_EXT_DEBUG_POISON is set for poisoned pages. This is used to + * implement generic debug pagealloc feature. The pages are filled with + * poison patterns and set this flag after free_pages(). The poisoned + * pages are verified whether the patterns are not corrupted and clear + * the flag before alloc_pages(). + */ + +enum page_ext_flags { + PAGE_EXT_DEBUG_POISON, /* Page is poisoned */ + PAGE_EXT_DEBUG_GUARD, +}; + +/* * Page Extension can be considered as an extended mem_map. * A page_ext page is associated with every page descriptor. The * page_ext helps us add more information about the page. |