[PATCH v4 01/34] mm: Add PAGE_TYPE_OP folio functions

["Vishal Moola (Oracle)" <vishal.moola@xxxxxxxxx>]

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@xxxxxxxxx>
---
 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 92a2063a0a23..e99a616b9bcd 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -908,6 +908,8 @@ 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)
 {
@@ -920,20 +922,34 @@ 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
-- 
2.40.1