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#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 */
PAGE_DEBUG_FLAG_GUARD,
};
/*
* 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_GUARD) \
/* && !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 */