The patch titled
Subject: mm: generate PAGE_IDLE_FLAG definitions
has been added to the -mm mm-unstable branch. Its filename is
mm-generate-page_idle_flag-definitions.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-generate-page_idle_flag-definitions.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: generate PAGE_IDLE_FLAG definitions
Date: Tue, 2 Apr 2024 21:12:51 +0100
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@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 9 +++++++-
include/linux/page_idle.h | 37 +----------------------------------
2 files changed, 10 insertions(+), 36 deletions(-)
--- a/include/linux/page-flags.h~mm-generate-page_idle_flag-definitions
+++ a/include/linux/page-flags.h
@@ -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
--- a/include/linux/page_idle.h~mm-generate-page_idle_flag-definitions
+++ a/include/linux/page_idle.h
@@ -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(stru
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 */
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-always-initialise-folio-_deferred_list.patch
mm-create-folio_flag_false-and-folio_type_ops-macros.patch
mm-remove-folio_prep_large_rmappable.patch
mm-support-page_mapcount-on-page_has_type-pages.patch
mm-turn-folio_test_hugetlb-into-a-pagetype.patch
mm-turn-folio_test_hugetlb-into-a-pagetype-fix.patch
mm-remove-a-call-to-compound_head-from-is_page_hwpoison.patch
mm-free-up-pg_slab.patch
mm-free-up-pg_slab-fix.patch
mm-improve-dumping-of-mapcount-and-page_type.patch
hugetlb-remove-mention-of-destructors.patch
sh-remove-use-of-pg_arch_1-on-individual-pages.patch
xtensa-remove-uses-of-pg_arch_1-on-individual-pages.patch
mm-make-page_ext_get-take-a-const-argument.patch
mm-make-folio_test_idle-and-folio_test_young-take-a-const-argument.patch
mm-make-is_free_buddy_page-take-a-const-argument.patch
mm-make-page_mapped-take-a-const-argument.patch
mm-convert-arch_clear_hugepage_flags-to-take-a-folio.patch
mm-convert-arch_clear_hugepage_flags-to-take-a-folio-fix.patch
slub-remove-use-of-page-flags.patch
remove-references-to-page-flags-in-documentation.patch
proc-rewrite-stable_page_flags.patch
proc-rewrite-stable_page_flags-fix.patch
sparc-use-is_huge_zero_pmd.patch
mm-add-is_huge_zero_folio.patch
mm-add-pmd_folio.patch
mm-convert-migrate_vma_collect_pmd-to-use-a-folio.patch
mm-convert-huge_zero_page-to-huge_zero_folio.patch
mm-convert-do_huge_pmd_anonymous_page-to-huge_zero_folio.patch
dax-use-huge_zero_folio.patch
mm-rename-mm_put_huge_zero_page-to-mm_put_huge_zero_folio.patch
mm-use-rwsem-assertion-macros-for-mmap_lock.patch
filemap-remove-__set_page_dirty.patch
mm-correct-page_mapped_in_vma-for-large-folios.patch
mm-remove-vma_address.patch
mm-rename-vma_pgoff_address-back-to-vma_address.patch
khugepaged-inline-hpage_collapse_alloc_folio.patch
khugepaged-convert-alloc_charge_hpage-to-alloc_charge_folio.patch
khugepaged-remove-hpage-from-collapse_huge_page.patch
khugepaged-pass-a-folio-to-__collapse_huge_page_copy.patch
khugepaged-remove-hpage-from-collapse_file.patch
khugepaged-use-a-folio-throughout-collapse_file.patch
khugepaged-use-a-folio-throughout-hpage_collapse_scan_file.patch
proc-convert-clear_refs_pte_range-to-use-a-folio.patch
proc-convert-smaps_account-to-use-a-folio.patch
mm-remove-page_idle-and-page_young-wrappers.patch
mm-generate-page_idle_flag-definitions.patch
