[PATCH v4 1/5] mm/hugetlb: add folio support to hugetlb specific flag macros

[Sidhartha Kumar]

Allows the macros which test, set, and clear hugetlb specific page
flags to take a hugetlb folio as an input. The marcros are generated as
folio_{test, set, clear}_hugetlb_{restore_reserve, migratable,
temporary, freed, vmemmap_optimized, raw_hwp_unreliable}.

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
---
 include/linux/hugetlb.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index cfe15b32e2d4..8edcdb6a833f 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -623,26 +623,50 @@ enum hugetlb_page_flags {
  */
 #ifdef CONFIG_HUGETLB_PAGE
 #define TESTHPAGEFLAG(uname, flname)				\
+static __always_inline						\
+bool folio_test_hugetlb_##flname(struct folio *folio)		\
+	{	void *private = &folio->private;		\
+		return test_bit(HPG_##flname, private);		\
+	}							\
 static inline int HPage##uname(struct page *page)		\
 	{ return test_bit(HPG_##flname, &(page->private)); }
 
 #define SETHPAGEFLAG(uname, flname)				\
+static __always_inline						\
+void folio_set_hugetlb_##flname(struct folio *folio)		\
+	{	void *private = &folio->private;		\
+		set_bit(HPG_##flname, private);			\
+	}							\
 static inline void SetHPage##uname(struct page *page)		\
 	{ set_bit(HPG_##flname, &(page->private)); }
 
 #define CLEARHPAGEFLAG(uname, flname)				\
+static __always_inline						\
+void folio_clear_hugetlb_##flname(struct folio *folio)		\
+	{	void *private = &folio->private;		\
+		clear_bit(HPG_##flname, private);		\
+	}							\
 static inline void ClearHPage##uname(struct page *page)		\
 	{ clear_bit(HPG_##flname, &(page->private)); }
 #else
 #define TESTHPAGEFLAG(uname, flname)				\
+static inline bool						\
+folio_test_hugetlb_##flname(struct folio *folio)		\
+	{ return 0; }						\
 static inline int HPage##uname(struct page *page)		\
 	{ return 0; }
 
 #define SETHPAGEFLAG(uname, flname)				\
+static inline void						\
+folio_set_hugetlb_##flname(struct folio *folio) 		\
+	{ }							\
 static inline void SetHPage##uname(struct page *page)		\
 	{ }
 
 #define CLEARHPAGEFLAG(uname, flname)				\
+static inline void						\
+folio_clear_hugetlb_##flname(struct folio *folio)		\
+	{ }							\
 static inline void ClearHPage##uname(struct page *page)		\
 	{ }
 #endif
-- 
2.31.1