Commit 0d846469 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

mm: remove PageWaiters, PageSetWaiters and PageClearWaiters 

All callers have been converted to use folios.  This was the only user of
PF_ONLY_HEAD, so remove that too.

Link: https://lkml.kernel.org/r/20240227192337.757313-3-willy@infradead.org


Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent dfbac6dc

include/linux/page-flags.h

+1 −9
Original line number Diff line number Diff line
@@ -328,9 +328,6 @@ static unsigned long *folio_flags(struct folio *folio, unsigned n) 
 *     for compound page all operations related to the page flag applied to

 *     head page.

 *

 * PF_ONLY_HEAD:

 *     for compound page, callers only ever operate on the head page.

 *

 * PF_NO_TAIL:

 *     modifications of the page flag must be done on small or head pages,

 *     checks can be done on tail pages too.
@@ -346,9 +343,6 @@ static unsigned long *folio_flags(struct folio *folio, unsigned n) 
		page; })

#define PF_ANY(page, enforce)	PF_POISONED_CHECK(page)

#define PF_HEAD(page, enforce)	PF_POISONED_CHECK(compound_head(page))

#define PF_ONLY_HEAD(page, enforce) ({					\

		VM_BUG_ON_PGFLAGS(PageTail(page), page);		\

		PF_POISONED_CHECK(page); })

#define PF_NO_TAIL(page, enforce) ({					\

		VM_BUG_ON_PGFLAGS(enforce && PageTail(page), page);	\

		PF_POISONED_CHECK(compound_head(page)); })
@@ -362,7 +356,6 @@ static unsigned long *folio_flags(struct folio *folio, unsigned n) 
/* Which page is the flag stored in */

#define FOLIO_PF_ANY		0

#define FOLIO_PF_HEAD		0

#define FOLIO_PF_ONLY_HEAD	0

#define FOLIO_PF_NO_TAIL	0

#define FOLIO_PF_NO_COMPOUND	0

#define FOLIO_PF_SECOND		1
@@ -488,7 +481,7 @@ static inline int TestClearPage##uname(struct page *page) { return 0; } 
	TESTSETFLAG_FALSE(uname, lname) TESTCLEARFLAG_FALSE(uname, lname)



__PAGEFLAG(Locked, locked, PF_NO_TAIL)

PAGEFLAG(Waiters, waiters, PF_ONLY_HEAD)

FOLIO_FLAG(waiters, FOLIO_HEAD_PAGE)

PAGEFLAG(Error, error, PF_NO_TAIL) TESTCLEARFLAG(Error, error, PF_NO_TAIL)

PAGEFLAG(Referenced, referenced, PF_HEAD)

	TESTCLEARFLAG(Referenced, referenced, PF_HEAD)
@@ -1138,7 +1131,6 @@ static inline bool folio_has_private(struct folio *folio) 


#undef PF_ANY

#undef PF_HEAD

#undef PF_ONLY_HEAD

#undef PF_NO_TAIL

#undef PF_NO_COMPOUND

#undef PF_SECOND