| #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 */ |