1 #ifndef LINUX_PAGE_DEBUG_FLAGS_H
2 #define LINUX_PAGE_DEBUG_FLAGS_H
5 * page->debug_flags bits:
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().
14 enum page_debug_flags
{
15 PAGE_DEBUG_FLAG_POISON
, /* Page is poisoned */
16 PAGE_DEBUG_FLAG_GUARD
,
20 * Ensure that CONFIG_WANT_PAGE_DEBUG_FLAGS reliably
21 * gets turned off when no debug features are enabling it!
24 #ifdef CONFIG_WANT_PAGE_DEBUG_FLAGS
25 #if !defined(CONFIG_PAGE_POISONING) && \
26 !defined(CONFIG_PAGE_GUARD) \
27 /* && !defined(CONFIG_PAGE_DEBUG_SOMETHING_ELSE) && ... */
28 #error WANT_PAGE_DEBUG_FLAGS is turned on with no debug features!
30 #endif /* CONFIG_WANT_PAGE_DEBUG_FLAGS */
32 #endif /* LINUX_PAGE_DEBUG_FLAGS_H */
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