Commit 12bbaae7 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

mm: create FOLIO_FLAG_FALSE and FOLIO_TYPE_OPS macros 

Following the separation of FOLIO_FLAGS from PAGEFLAGS, separate
FOLIO_FLAG_FALSE from PAGEFLAG_FALSE and FOLIO_TYPE_OPS from
PAGE_TYPE_OPS.

Link: https://lkml.kernel.org/r/20240321142448.1645400-3-willy@infradead.org


Fixes: 9c5ccf2d ("mm: remove HUGETLB_PAGE_DTOR")
Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent b76b4690

include/linux/page-flags.h

+47 −23
Original line number Diff line number Diff line
@@ -458,30 +458,51 @@ static __always_inline int TestClearPage##uname(struct page *page) \ 
	TESTSETFLAG(uname, lname, policy)				\

	TESTCLEARFLAG(uname, lname, policy)



#define FOLIO_TEST_FLAG_FALSE(name)					\

static inline bool folio_test_##name(const struct folio *folio)		\

{ return false; }

#define FOLIO_SET_FLAG_NOOP(name)					\

static inline void folio_set_##name(struct folio *folio) { }

#define FOLIO_CLEAR_FLAG_NOOP(name)					\

static inline void folio_clear_##name(struct folio *folio) { }

#define __FOLIO_SET_FLAG_NOOP(name)					\

static inline void __folio_set_##name(struct folio *folio) { }

#define __FOLIO_CLEAR_FLAG_NOOP(name)					\

static inline void __folio_clear_##name(struct folio *folio) { }

#define FOLIO_TEST_SET_FLAG_FALSE(name)					\

static inline bool folio_test_set_##name(struct folio *folio)		\

{ return false; }

#define FOLIO_TEST_CLEAR_FLAG_FALSE(name)				\

static inline bool folio_test_clear_##name(struct folio *folio)		\

{ return false; }



#define FOLIO_FLAG_FALSE(name)						\

FOLIO_TEST_FLAG_FALSE(name)						\

FOLIO_SET_FLAG_NOOP(name)						\

FOLIO_CLEAR_FLAG_NOOP(name)



#define TESTPAGEFLAG_FALSE(uname, lname)				\

static inline bool folio_test_##lname(const struct folio *folio) { return false; } \

FOLIO_TEST_FLAG_FALSE(lname)						\

static inline int Page##uname(const struct page *page) { return 0; }



#define SETPAGEFLAG_NOOP(uname, lname)					\

static inline void folio_set_##lname(struct folio *folio) { }		\

FOLIO_SET_FLAG_NOOP(lname)						\

static inline void SetPage##uname(struct page *page) {  }



#define CLEARPAGEFLAG_NOOP(uname, lname)				\

static inline void folio_clear_##lname(struct folio *folio) { }		\

FOLIO_CLEAR_FLAG_NOOP(lname)						\

static inline void ClearPage##uname(struct page *page) {  }



#define __CLEARPAGEFLAG_NOOP(uname, lname)				\

static inline void __folio_clear_##lname(struct folio *folio) { }	\

__FOLIO_CLEAR_FLAG_NOOP(lname)						\

static inline void __ClearPage##uname(struct page *page) {  }



#define TESTSETFLAG_FALSE(uname, lname)					\

static inline bool folio_test_set_##lname(struct folio *folio)		\

{ return 0; }								\

FOLIO_TEST_SET_FLAG_FALSE(lname)					\

static inline int TestSetPage##uname(struct page *page) { return 0; }



#define TESTCLEARFLAG_FALSE(uname, lname)				\

static inline bool folio_test_clear_##lname(struct folio *folio)	\

{ return 0; }								\

FOLIO_TEST_CLEAR_FLAG_FALSE(lname)					\

static inline int TestClearPage##uname(struct page *page) { return 0; }



#define PAGEFLAG_FALSE(uname, lname) TESTPAGEFLAG_FALSE(uname, lname)	\
@@ -977,35 +998,38 @@ static inline int page_has_type(const struct page *page) 
	return page_type_has_type(page->page_type);

}



#define FOLIO_TYPE_OPS(lname, fname)					\

static __always_inline bool folio_test_##fname(const struct folio *folio)\

{									\

	return folio_test_type(folio, PG_##lname);			\

}									\

static __always_inline void __folio_set_##fname(struct folio *folio)	\

{									\

	VM_BUG_ON_FOLIO(!folio_test_type(folio, 0), folio);		\

	folio->page.page_type &= ~PG_##lname;				\

}									\

static __always_inline void __folio_clear_##fname(struct folio *folio)	\

{									\

	VM_BUG_ON_FOLIO(!folio_test_##fname(folio), folio);		\

	folio->page.page_type |= PG_##lname;				\

}



#define PAGE_TYPE_OPS(uname, lname, fname)				\

FOLIO_TYPE_OPS(lname, fname)						\

static __always_inline int Page##uname(const struct page *page)		\

{									\

	return PageType(page, PG_##lname);				\

}									\

static __always_inline int folio_test_##fname(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_##fname(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_##fname(struct folio *folio)	\

{									\

	VM_BUG_ON_FOLIO(!folio_test_##fname(folio), folio);		\

	folio->page.page_type |= PG_##lname;				\

}									\

}



/*

 * PageBuddy() indicates that the page is free and in the buddy system