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mm: generate PAGE_IDLE_FLAG definitions

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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: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-04-02 21:12:51 +01:00 committed by Andrew Morton
parent 1ade67cd22
commit 8c9e8381ea
2 changed files with 10 additions and 36 deletions
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9
include/linux/page-flags.h
View File

@ -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

37
include/linux/page_idle.h
View File

@ -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 */