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/* 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> #if defined(CONFIG_PAGE_IDLE_FLAG) && !defined(CONFIG_64BIT) /* * If there is not enough space to store Idle and Young bits in page flags, use * page ext flags instead. */ static inline bool folio_test_young(const struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); bool page_young; if (unlikely(!page_ext)) return false; page_young = test_bit(PAGE_EXT_YOUNG, &page_ext->flags); page_ext_put(page_ext); return page_young; } static inline void folio_set_young(struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); if (unlikely(!page_ext)) return; set_bit(PAGE_EXT_YOUNG, &page_ext->flags); page_ext_put(page_ext); } static inline bool folio_test_clear_young(struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); bool page_young; if (unlikely(!page_ext)) return false; page_young = test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags); page_ext_put(page_ext); return page_young; } static inline bool folio_test_idle(const struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); bool page_idle; if (unlikely(!page_ext)) return false; page_idle = test_bit(PAGE_EXT_IDLE, &page_ext->flags); page_ext_put(page_ext); return page_idle; } static inline void folio_set_idle(struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); if (unlikely(!page_ext)) return; set_bit(PAGE_EXT_IDLE, &page_ext->flags); page_ext_put(page_ext); } static inline void folio_clear_idle(struct folio *folio) { struct page_ext *page_ext = page_ext_get(&folio->page); if (unlikely(!page_ext)) return; clear_bit(PAGE_EXT_IDLE, &page_ext->flags); page_ext_put(page_ext); } #endif /* CONFIG_PAGE_IDLE_FLAG && !64BIT */ #endif /* _LINUX_MM_PAGE_IDLE_H */
