[PATCH v2 01/34] mm: Add PAGE_TYPE_OP folio functions

[Vishal Moola (Oracle)]

No folio equivalents for page type operations have been defined, so
define them for later folio conversions.

Also changes the Page##uname macros to take in const struct page* since
we only read the memory here.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola at gmail.com>
---
 include/linux/page-flags.h | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 1c68d67b832f..607b495d1b57 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -902,6 +902,8 @@ static inline bool is_page_hwpoison(struct page *page)
 
 #define PageType(page, flag)						\
 	((page->page_type & (PAGE_TYPE_BASE | flag)) == PAGE_TYPE_BASE)
+#define folio_test_type(folio, flag)					\
+	((folio->page.page_type & (PAGE_TYPE_BASE | flag)) == PAGE_TYPE_BASE)
 
 static inline int page_type_has_type(unsigned int page_type)
 {
@@ -914,20 +916,34 @@ static inline int page_has_type(struct page *page)
 }
 
 #define PAGE_TYPE_OPS(uname, lname)					\
-static __always_inline int Page##uname(struct page *page)		\
+static __always_inline int Page##uname(const struct page *page)		\
 {									\
 	return PageType(page, PG_##lname);				\
 }									\
+static __always_inline int folio_test_##lname(const struct folio *folio)\
+{									\
+	return folio_test_type(folio, PG_##lname);			\
+}									\
 static __always_inline void __SetPage##uname(struct page *page)		\
 {									\
 	VM_BUG_ON_PAGE(!PageType(page, 0), page);			\
 	page->page_type &= ~PG_##lname;					\
 }									\
+static __always_inline void __folio_set_##lname(struct folio *folio)	\
+{									\
+	VM_BUG_ON_FOLIO(!folio_test_type(folio, 0), folio);		\
+	folio->page.page_type &= ~PG_##lname;				\
+}									\
 static __always_inline void __ClearPage##uname(struct page *page)	\
 {									\
 	VM_BUG_ON_PAGE(!Page##uname(page), page);			\
 	page->page_type |= PG_##lname;					\
-}
+}									\
+static __always_inline void __folio_clear_##lname(struct folio *folio)	\
+{									\
+	VM_BUG_ON_FOLIO(!folio_test_##lname(folio), folio);		\
+	folio->page.page_type |= PG_##lname;				\
+}									\
 
 /*
  * PageBuddy() indicates that the page is free and in the buddy system
-- 
2.39.2