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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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 */