Commit 8c9e8381 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

mm: generate PAGE_IDLE_FLAG definitions 

If CONFIG_PAGE_IDLE_FLAG is not set, we can use FOLIO_FLAG_FALSE() to
generate these definitions.

Link: https://lkml.kernel.org/r/20240402201252.917342-5-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 1ade67cd

include/linux/page-flags.h

+8 −1
Original line number Diff line number Diff line
@@ -626,12 +626,19 @@ PAGEFLAG_FALSE(HWPoison, hwpoison) 
#define __PG_HWPOISON 0

#endif



#if defined(CONFIG_PAGE_IDLE_FLAG) && defined(CONFIG_64BIT)

#ifdef CONFIG_PAGE_IDLE_FLAG

#ifdef CONFIG_64BIT

FOLIO_TEST_FLAG(young, FOLIO_HEAD_PAGE)

FOLIO_SET_FLAG(young, FOLIO_HEAD_PAGE)

FOLIO_TEST_CLEAR_FLAG(young, FOLIO_HEAD_PAGE)

FOLIO_FLAG(idle, FOLIO_HEAD_PAGE)

#endif

/* See page_idle.h for !64BIT workaround */

#else /* !CONFIG_PAGE_IDLE_FLAG */

FOLIO_FLAG_FALSE(young)

FOLIO_TEST_CLEAR_FLAG_FALSE(young)

FOLIO_FLAG_FALSE(idle)

#endif



/*

 * PageReported() is used to track reported free pages within the Buddy

include/linux/page_idle.h

+2 −35
Original line number Diff line number Diff line
@@ -6,9 +6,7 @@ 
#include <linux/page-flags.h>

#include <linux/page_ext.h>



#ifdef CONFIG_PAGE_IDLE_FLAG



#ifndef CONFIG_64BIT

#if defined(CONFIG_PAGE_IDLE_FLAG) && !defined(CONFIG_64BIT)

/*

 * If there is not enough space to store Idle and Young bits in page flags, use

 * page ext flags instead.
@@ -87,36 +85,5 @@ static inline void folio_clear_idle(struct folio *folio) 
	clear_bit(PAGE_EXT_IDLE, &page_ext->flags);

	page_ext_put(page_ext);

}

#endif /* !CONFIG_64BIT */



#else /* !CONFIG_PAGE_IDLE_FLAG */



static inline bool folio_test_young(const struct folio *folio)

{

	return false;

}



static inline void folio_set_young(struct folio *folio)

{

}



static inline bool folio_test_clear_young(struct folio *folio)

{

	return false;

}



static inline bool folio_test_idle(const struct folio *folio)

{

	return false;

}



static inline void folio_set_idle(struct folio *folio)

{

}



static inline void folio_clear_idle(struct folio *folio)

{

}



#endif /* CONFIG_PAGE_IDLE_FLAG */

#endif /* CONFIG_PAGE_IDLE_FLAG && !64BIT */

#endif /* _LINUX_MM_PAGE_IDLE_H */