1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_MM_PAGE_IDLE_H
3 #define _LINUX_MM_PAGE_IDLE_H
5 #include <linux/bitops.h>
6 #include <linux/page-flags.h>
7 #include <linux/page_ext.h>
9 #ifdef CONFIG_PAGE_IDLE_FLAG
13 * If there is not enough space to store Idle and Young bits in page flags, use
14 * page ext flags instead.
16 extern struct page_ext_operations page_idle_ops;
18 static inline bool folio_test_young(struct folio *folio)
20 struct page_ext *page_ext = lookup_page_ext(&folio->page);
22 if (unlikely(!page_ext))
25 return test_bit(PAGE_EXT_YOUNG, &page_ext->flags);
28 static inline void folio_set_young(struct folio *folio)
30 struct page_ext *page_ext = lookup_page_ext(&folio->page);
32 if (unlikely(!page_ext))
35 set_bit(PAGE_EXT_YOUNG, &page_ext->flags);
38 static inline bool folio_test_clear_young(struct folio *folio)
40 struct page_ext *page_ext = lookup_page_ext(&folio->page);
42 if (unlikely(!page_ext))
45 return test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags);
48 static inline bool folio_test_idle(struct folio *folio)
50 struct page_ext *page_ext = lookup_page_ext(&folio->page);
52 if (unlikely(!page_ext))
55 return test_bit(PAGE_EXT_IDLE, &page_ext->flags);
58 static inline void folio_set_idle(struct folio *folio)
60 struct page_ext *page_ext = lookup_page_ext(&folio->page);
62 if (unlikely(!page_ext))
65 set_bit(PAGE_EXT_IDLE, &page_ext->flags);
68 static inline void folio_clear_idle(struct folio *folio)
70 struct page_ext *page_ext = lookup_page_ext(&folio->page);
72 if (unlikely(!page_ext))
75 clear_bit(PAGE_EXT_IDLE, &page_ext->flags);
77 #endif /* !CONFIG_64BIT */
79 #else /* !CONFIG_PAGE_IDLE_FLAG */
81 static inline bool folio_test_young(struct folio *folio)
86 static inline void folio_set_young(struct folio *folio)
90 static inline bool folio_test_clear_young(struct folio *folio)
95 static inline bool folio_test_idle(struct folio *folio)
100 static inline void folio_set_idle(struct folio *folio)
104 static inline void folio_clear_idle(struct folio *folio)
108 #endif /* CONFIG_PAGE_IDLE_FLAG */
110 static inline bool page_is_young(struct page *page)
112 return folio_test_young(page_folio(page));
115 static inline void set_page_young(struct page *page)
117 folio_set_young(page_folio(page));
120 static inline bool test_and_clear_page_young(struct page *page)
122 return folio_test_clear_young(page_folio(page));
125 static inline bool page_is_idle(struct page *page)
127 return folio_test_idle(page_folio(page));
130 static inline void set_page_idle(struct page *page)
132 folio_set_idle(page_folio(page));
135 static inline void clear_page_idle(struct page *page)
137 folio_clear_idle(page_folio(page));
139 #endif /* _LINUX_MM_PAGE_IDLE_H */