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charset="utf-8" Add two helper functions __SetPageXXXValue and __GetPageXXXValue to assist in assigning values to the specified page_type. Since the current page_type value is not supported on large folio, only the page version of the helper functions is provided. Signed-off-by: Huan Yang --- include/linux/page-flags.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 3c7103c2eee4..52c9435079d5 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -1024,6 +1024,23 @@ static __always_inline void __ClearPage##uname(struc= t page *page) \ return; \ VM_BUG_ON_PAGE(!Page##uname(page), page); \ page->page_type =3D UINT_MAX; \ +} \ +static __always_inline void __PageSet##uname##Value(struct page *page, \ + unsigned int value) \ +{ \ + if (!Page##uname(page)) \ + return; \ + if (unlikely(value > (PAGE_TYPE_MASK))) \ + return; \ + WRITE_ONCE(page->page_type, (unsigned int)PGTY_##lname \ + << PAGE_TYPE_SHIFT | value); \ +} \ +static __always_inline unsigned int __PageGet##uname##Value( \ + struct page *page) \ +{ \ + if (!Page##uname(page)) \ + return 0; \ + return READ_ONCE(page->page_type) & PAGE_TYPE_MASK; \ } =20 /* --=20 2.34.1