1#ifndef LINUX_PAGE_DEBUG_FLAGS_H 2#define LINUX_PAGE_DEBUG_FLAGS_H 3 4/* 5 * page->debug_flags bits: 6 * 7 * PAGE_DEBUG_FLAG_POISON is set for poisoned pages. This is used to 8 * implement generic debug pagealloc feature. The pages are filled with 9 * poison patterns and set this flag after free_pages(). The poisoned 10 * pages are verified whether the patterns are not corrupted and clear 11 * the flag before alloc_pages(). 12 */ 13 14enum page_debug_flags { 15 PAGE_DEBUG_FLAG_POISON, /* Page is poisoned */ 16}; 17 18/* 19 * Ensure that CONFIG_WANT_PAGE_DEBUG_FLAGS reliably 20 * gets turned off when no debug features are enabling it! 21 */ 22 23#ifdef CONFIG_WANT_PAGE_DEBUG_FLAGS 24#if !defined(CONFIG_PAGE_POISONING) /* && !defined(CONFIG_PAGE_DEBUG_SOMETHING_ELSE) && \ 25 ... */ 26#error WANT_PAGE_DEBUG_FLAGS is turned on with no debug features! 27#endif 28#endif /* CONFIG_WANT_PAGE_DEBUG_FLAGS */ 29 30#endif /* LINUX_PAGE_DEBUG_FLAGS_H */ 31