| #ifndef LINUX_PAGE_DEBUG_FLAGS_H | |
| #define LINUX_PAGE_DEBUG_FLAGS_H | |
| /* | |
| * page->debug_flags bits: | |
| * | |
| * PAGE_DEBUG_FLAG_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_debug_flags { | |
| PAGE_DEBUG_FLAG_POISON, /* Page is poisoned */ | |
| }; | |
| /* | |
| * Ensure that CONFIG_WANT_PAGE_DEBUG_FLAGS reliably | |
| * gets turned off when no debug features are enabling it! | |
| */ | |
| #ifdef CONFIG_WANT_PAGE_DEBUG_FLAGS | |
| #if !defined(CONFIG_PAGE_POISONING) \ | |
| /* && !defined(CONFIG_PAGE_DEBUG_SOMETHING_ELSE) && ... */ | |
| #error WANT_PAGE_DEBUG_FLAGS is turned on with no debug features! | |
| #endif | |
| #endif /* CONFIG_WANT_PAGE_DEBUG_FLAGS */ | |
| #endif /* LINUX_PAGE_DEBUG_FLAGS_H */ |