1 #ifndef __LINUX_PAGE_EXT_H
2 #define __LINUX_PAGE_EXT_H
5 struct page_ext_operations
{
10 #ifdef CONFIG_PAGE_EXTENSION
13 * page_ext->flags bits:
15 * PAGE_EXT_DEBUG_POISON is set for poisoned pages. This is used to
16 * implement generic debug pagealloc feature. The pages are filled with
17 * poison patterns and set this flag after free_pages(). The poisoned
18 * pages are verified whether the patterns are not corrupted and clear
19 * the flag before alloc_pages().
23 PAGE_EXT_DEBUG_POISON
, /* Page is poisoned */
28 * Page Extension can be considered as an extended mem_map.
29 * A page_ext page is associated with every page descriptor. The
30 * page_ext helps us add more information about the page.
31 * All page_ext are allocated at boot or memory hotplug event,
32 * then the page_ext for pfn always exists.
38 extern void pgdat_page_ext_init(struct pglist_data
*pgdat
);
40 #ifdef CONFIG_SPARSEMEM
41 static inline void page_ext_init_flatmem(void)
44 extern void page_ext_init(void);
46 extern void page_ext_init_flatmem(void);
47 static inline void page_ext_init(void)
52 struct page_ext
*lookup_page_ext(struct page
*page
);
54 #else /* !CONFIG_PAGE_EXTENSION */
57 static inline void pgdat_page_ext_init(struct pglist_data
*pgdat
)
61 static inline struct page_ext
*lookup_page_ext(struct page
*page
)
66 static inline void page_ext_init(void)
70 static inline void page_ext_init_flatmem(void)
73 #endif /* CONFIG_PAGE_EXTENSION */
74 #endif /* __LINUX_PAGE_EXT_H */
This page took 0.030998 seconds and 5 git commands to generate.