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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_MM_PAGE_IDLE_H #define _LINUX_MM_PAGE_IDLE_H #include <linux/bitops.h> #include <linux/page-flags.h> #include <linux/page_ext.h> #ifdef CONFIG_IDLE_PAGE_TRACKING #ifdef CONFIG_64BIT static inline bool page_is_young(struct page *page) { return PageYoung(page); } static inline void set_page_young(struct page *page) { SetPageYoung(page); } static inline bool test_and_clear_page_young(struct page *page) { return TestClearPageYoung(page); } static inline bool page_is_idle(struct page *page) { return PageIdle(page); } static inline void set_page_idle(struct page *page) { SetPageIdle(page); } static inline void clear_page_idle(struct page *page) { ClearPageIdle(page); } #else /* !CONFIG_64BIT */ /* * If there is not enough space to store Idle and Young bits in page flags, use * page ext flags instead. */ extern struct page_ext_operations page_idle_ops; static inline bool page_is_young(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return false; return test_bit(PAGE_EXT_YOUNG, &page_ext->flags); } static inline void set_page_young(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return; set_bit(PAGE_EXT_YOUNG, &page_ext->flags); } static inline bool test_and_clear_page_young(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return false; return test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags); } static inline bool page_is_idle(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return false; return test_bit(PAGE_EXT_IDLE, &page_ext->flags); } static inline void set_page_idle(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return; set_bit(PAGE_EXT_IDLE, &page_ext->flags); } static inline void clear_page_idle(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return; clear_bit(PAGE_EXT_IDLE, &page_ext->flags); } #endif /* CONFIG_64BIT */ #else /* !CONFIG_IDLE_PAGE_TRACKING */ static inline bool page_is_young(struct page *page) { return false; } static inline void set_page_young(struct page *page) { } static inline bool test_and_clear_page_young(struct page *page) { return false; } static inline bool page_is_idle(struct page *page) { return false; } static inline void set_page_idle(struct page *page) { } static inline void clear_page_idle(struct page *page) { } #endif /* CONFIG_IDLE_PAGE_TRACKING */ #endif /* _LINUX_MM_PAGE_IDLE_H */ |