projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 33c3fc71 VD |
2 | #ifndef _LINUX_MM_PAGE_IDLE_H |
| 3 | #define _LINUX_MM_PAGE_IDLE_H | |
| 4 | ||
| 5 | #include <linux/bitops.h> | |
| 6 | #include <linux/page-flags.h> | |
| 7 | #include <linux/page_ext.h> | |
| 8 | ||
| 8c9e8381 | 9 | #if defined(CONFIG_PAGE_IDLE_FLAG) && !defined(CONFIG_64BIT) |
| 33c3fc71 VD |
10 | /* |
| 11 | * If there is not enough space to store Idle and Young bits in page flags, use | |
| 12 | * page ext flags instead. | |
| 13 | */ | |
| e3089fd0 | 14 | static inline bool folio_test_young(const struct folio *folio) |
| 33c3fc71 | 15 | { |
| b1d5488a CTK |
16 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| 17 | bool page_young; | |
| f86e4271 YS |
18 | |
| 19 | if (unlikely(!page_ext)) | |
| 20 | return false; | |
| 21 | ||
| b1d5488a CTK |
22 | page_young = test_bit(PAGE_EXT_YOUNG, &page_ext->flags); |
| 23 | page_ext_put(page_ext); | |
| 24 | ||
| 25 | return page_young; | |
| 33c3fc71 VD |
26 | } |
| 27 | ||
| 35a020ba | 28 | static inline void folio_set_young(struct folio *folio) |
| 33c3fc71 | 29 | { |
| b1d5488a | 30 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| f86e4271 YS |
31 | |
| 32 | if (unlikely(!page_ext)) | |
| 33 | return; | |
| 34 | ||
| 35 | set_bit(PAGE_EXT_YOUNG, &page_ext->flags); | |
| b1d5488a | 36 | page_ext_put(page_ext); |
| 33c3fc71 VD |
37 | } |
| 38 | ||
| 35a020ba | 39 | static inline bool folio_test_clear_young(struct folio *folio) |
| 33c3fc71 | 40 | { |
| b1d5488a CTK |
41 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| 42 | bool page_young; | |
| f86e4271 YS |
43 | |
| 44 | if (unlikely(!page_ext)) | |
| 45 | return false; | |
| 46 | ||
| b1d5488a CTK |
47 | page_young = test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags); |
| 48 | page_ext_put(page_ext); | |
| 49 | ||
| 50 | return page_young; | |
| 33c3fc71 VD |
51 | } |
| 52 | ||
| e3089fd0 | 53 | static inline bool folio_test_idle(const struct folio *folio) |
| 33c3fc71 | 54 | { |
| b1d5488a CTK |
55 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| 56 | bool page_idle; | |
| f86e4271 YS |
57 | |
| 58 | if (unlikely(!page_ext)) | |
| 59 | return false; | |
| 60 | ||
| e3089fd0 | 61 | page_idle = test_bit(PAGE_EXT_IDLE, &page_ext->flags); |
| b1d5488a CTK |
62 | page_ext_put(page_ext); |
| 63 | ||
| 64 | return page_idle; | |
| 33c3fc71 VD |
65 | } |
| 66 | ||
| 35a020ba | 67 | static inline void folio_set_idle(struct folio *folio) |
| 33c3fc71 | 68 | { |
| b1d5488a | 69 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| f86e4271 YS |
70 | |
| 71 | if (unlikely(!page_ext)) | |
| 72 | return; | |
| 73 | ||
| 74 | set_bit(PAGE_EXT_IDLE, &page_ext->flags); | |
| b1d5488a | 75 | page_ext_put(page_ext); |
| 33c3fc71 VD |
76 | } |
| 77 | ||
| 35a020ba | 78 | static inline void folio_clear_idle(struct folio *folio) |
| 33c3fc71 | 79 | { |
| b1d5488a | 80 | struct page_ext *page_ext = page_ext_get(&folio->page); |
| f86e4271 YS |
81 | |
| 82 | if (unlikely(!page_ext)) | |
| 83 | return; | |
| 84 | ||
| 85 | clear_bit(PAGE_EXT_IDLE, &page_ext->flags); | |
| b1d5488a | 86 | page_ext_put(page_ext); |
| 33c3fc71 | 87 | } |
| 8c9e8381 | 88 | #endif /* CONFIG_PAGE_IDLE_FLAG && !64BIT */ |
| 33c3fc71 | 89 | #endif /* _LINUX_MM_PAGE_IDLE_H */ |