The patch titled
Subject: mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-__have_arch_pte_swp_exclusive.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-__have_arch_pte_swp_exclusive.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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branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE
Date: Fri, 13 Jan 2023 18:10:26 +0100
__HAVE_ARCH_PTE_SWP_EXCLUSIVE is now supported by all architectures that
support swp PTEs, so let's drop it.
Link: https://lkml.kernel.org/r/20230113171026.582290-27-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/arch/alpha/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/alpha/include/asm/pgtable.h
@@ -328,7 +328,6 @@ extern inline pte_t mk_swap_pte(unsigned
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/arc/include/asm/pgtable-bits-arcv2.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/arc/include/asm/pgtable-bits-arcv2.h
@@ -132,7 +132,6 @@ void update_mmu_cache(struct vm_area_str
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/arm64/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/arm64/include/asm/pgtable.h
@@ -417,7 +417,6 @@ static inline pgprot_t mk_pmd_sect_prot(
return __pgprot((pgprot_val(prot) & ~PMD_TABLE_BIT) | PMD_TYPE_SECT);
}
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline pte_t pte_swp_mkexclusive(pte_t pte)
{
return set_pte_bit(pte, __pgprot(PTE_SWP_EXCLUSIVE));
--- a/arch/arm/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/arm/include/asm/pgtable.h
@@ -298,7 +298,6 @@ static inline pte_t pte_modify(pte_t pte
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(swp) __pte((swp).val)
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_isset(pte, L_PTE_SWP_EXCLUSIVE);
--- a/arch/csky/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/csky/include/asm/pgtable.h
@@ -200,7 +200,6 @@ static inline pte_t pte_mkyoung(pte_t pt
return pte;
}
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/hexagon/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/hexagon/include/asm/pgtable.h
@@ -397,7 +397,6 @@ static inline unsigned long pmd_page_vad
(((type & 0x1f) << 1) | \
((offset & 0x3ffff8) << 10) | ((offset & 0x7) << 7)) })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/ia64/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/ia64/include/asm/pgtable.h
@@ -424,7 +424,6 @@ extern void paging_init (void);
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/loongarch/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/loongarch/include/asm/pgtable.h
@@ -276,7 +276,6 @@ static inline pte_t mk_swap_pte(unsigned
#define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) })
#define __swp_entry_to_pmd(x) ((pmd_t) { (x).val | _PAGE_HUGE })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/m68k/include/asm/mcf_pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/m68k/include/asm/mcf_pgtable.h
@@ -275,7 +275,6 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD]
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) (__pte((x).val))
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/m68k/include/asm/motorola_pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/m68k/include/asm/motorola_pgtable.h
@@ -190,7 +190,6 @@ extern pgd_t kernel_pg_dir[128];
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/m68k/include/asm/sun3_pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/m68k/include/asm/sun3_pgtable.h
@@ -174,7 +174,6 @@ extern pgd_t kernel_pg_dir[PTRS_PER_PGD]
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/microblaze/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/microblaze/include/asm/pgtable.h
@@ -412,7 +412,6 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 2 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 2 })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/mips/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/mips/include/asm/pgtable.h
@@ -528,7 +528,6 @@ static inline pte_t pte_modify(pte_t pte
}
#endif
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
static inline int pte_swp_exclusive(pte_t pte)
{
--- a/arch/nios2/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/nios2/include/asm/pgtable.h
@@ -253,7 +253,6 @@ static inline unsigned long pmd_page_vad
#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/openrisc/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/openrisc/include/asm/pgtable.h
@@ -408,7 +408,6 @@ static inline void update_mmu_cache(stru
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/parisc/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/parisc/include/asm/pgtable.h
@@ -422,7 +422,6 @@ extern void paging_init (void);
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -386,7 +386,6 @@ static inline void __ptep_set_access_fla
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 3 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 3 })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -717,7 +717,6 @@ static inline pte_t pte_swp_clear_soft_d
}
#endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline pte_t pte_swp_mkexclusive(pte_t pte)
{
return __pte_raw(pte_raw(pte) | cpu_to_be64(_PAGE_SWP_EXCLUSIVE));
--- a/arch/powerpc/include/asm/nohash/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/powerpc/include/asm/nohash/pgtable.h
@@ -151,7 +151,6 @@ static inline pte_t pte_modify(pte_t pte
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/riscv/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/riscv/include/asm/pgtable.h
@@ -752,7 +752,6 @@ static inline pmd_t pmdp_establish(struc
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/s390/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/s390/include/asm/pgtable.h
@@ -812,7 +812,6 @@ static inline int pmd_protnone(pmd_t pmd
}
#endif
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/sh/include/asm/pgtable_32.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/sh/include/asm/pgtable_32.h
@@ -479,7 +479,6 @@ static inline unsigned long pmd_page_vad
/* In both cases, we borrow bit 6 to store the exclusive marker in swap PTEs. */
#define _PAGE_SWP_EXCLUSIVE _PAGE_USER
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte.pte_low & _PAGE_SWP_EXCLUSIVE;
--- a/arch/sparc/include/asm/pgtable_32.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/sparc/include/asm/pgtable_32.h
@@ -353,7 +353,6 @@ static inline swp_entry_t __swp_entry(un
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & SRMMU_SWP_EXCLUSIVE;
--- a/arch/sparc/include/asm/pgtable_64.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -989,7 +989,6 @@ pgtable_t pgtable_trans_huge_withdraw(st
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/arch/um/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/um/include/asm/pgtable.h
@@ -313,7 +313,6 @@ extern pte_t *virt_to_pte(struct mm_stru
((swp_entry_t) { pte_val(pte_mkuptodate(pte)) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_get_bits(pte, _PAGE_SWP_EXCLUSIVE);
--- a/arch/x86/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/x86/include/asm/pgtable.h
@@ -1299,7 +1299,6 @@ static inline void update_mmu_cache_pud(
unsigned long addr, pud_t *pud)
{
}
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline pte_t pte_swp_mkexclusive(pte_t pte)
{
return pte_set_flags(pte, _PAGE_SWP_EXCLUSIVE);
--- a/arch/xtensa/include/asm/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/arch/xtensa/include/asm/pgtable.h
@@ -360,7 +360,6 @@ ptep_set_wrprotect(struct mm_struct *mm,
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-#define __HAVE_ARCH_PTE_SWP_EXCLUSIVE
static inline int pte_swp_exclusive(pte_t pte)
{
return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
--- a/include/linux/pgtable.h~mm-remove-__have_arch_pte_swp_exclusive
+++ a/include/linux/pgtable.h
@@ -1064,35 +1064,6 @@ static inline pgprot_t pgprot_modify(pgp
#define arch_start_context_switch(prev) do {} while (0)
#endif
-/*
- * When replacing an anonymous page by a real (!non) swap entry, we clear
- * PG_anon_exclusive from the page and instead remember whether the flag was
- * set in the swp pte. During fork(), we have to mark the entry as !exclusive
- * (possibly shared). On swapin, we use that information to restore
- * PG_anon_exclusive, which is very helpful in cases where we might have
- * additional (e.g., FOLL_GET) references on a page and wouldn't be able to
- * detect exclusivity.
- *
- * These functions don't apply to non-swap entries (e.g., migration, hwpoison,
- * ...).
- */
-#ifndef __HAVE_ARCH_PTE_SWP_EXCLUSIVE
-static inline pte_t pte_swp_mkexclusive(pte_t pte)
-{
- return pte;
-}
-
-static inline int pte_swp_exclusive(pte_t pte)
-{
- return false;
-}
-
-static inline pte_t pte_swp_clear_exclusive(pte_t pte)
-{
- return pte;
-}
-#endif
-
#ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY
#ifndef CONFIG_ARCH_ENABLE_THP_MIGRATION
static inline pmd_t pmd_swp_mksoft_dirty(pmd_t pmd)
--- a/mm/debug_vm_pgtable.c~mm-remove-__have_arch_pte_swp_exclusive
+++ a/mm/debug_vm_pgtable.c
@@ -810,7 +810,6 @@ static void __init pmd_swap_soft_dirty_t
static void __init pte_swap_exclusive_tests(struct pgtable_debug_args *args)
{
-#ifdef __HAVE_ARCH_PTE_SWP_EXCLUSIVE
unsigned long max_swapfile_size = generic_max_swapfile_size();
swp_entry_t entry, entry2;
pte_t pte;
@@ -839,7 +838,6 @@ static void __init pte_swap_exclusive_te
WARN_ON(!is_swap_pte(pte));
entry2 = pte_to_swp_entry(pte);
WARN_ON(memcmp(&entry, &entry2, sizeof(entry)));
-#endif /* __HAVE_ARCH_PTE_SWP_EXCLUSIVE */
}
static void __init pte_swap_tests(struct pgtable_debug_args *args)
--- a/mm/memory.c~mm-remove-__have_arch_pte_swp_exclusive
+++ a/mm/memory.c
@@ -3870,10 +3870,6 @@ vm_fault_t do_swap_page(struct vm_fault
* the swap entry concurrently) for certainly exclusive pages.
*/
if (!folio_test_ksm(folio)) {
- /*
- * Note that pte_swp_exclusive() == false for architectures
- * without __HAVE_ARCH_PTE_SWP_EXCLUSIVE.
- */
exclusive = pte_swp_exclusive(vmf->orig_pte);
if (folio != swapcache) {
/*
--- a/mm/rmap.c~mm-remove-__have_arch_pte_swp_exclusive
+++ a/mm/rmap.c
@@ -1710,17 +1710,6 @@ static bool try_to_unmap_one(struct foli
page_vma_mapped_walk_done(&pvmw);
break;
}
- /*
- * Note: We *don't* remember if the page was mapped
- * exclusively in the swap pte if the architecture
- * doesn't support __HAVE_ARCH_PTE_SWP_EXCLUSIVE. In
- * that case, swapin code has to re-determine that
- * manually and might detect the page as possibly
- * shared, for example, if there are other references on
- * the page or if the page is under writeback. We made
- * sure that there are no GUP pins on the page that
- * would rely on it, so for GUP pins this is fine.
- */
if (list_empty(&mm->mmlist)) {
spin_lock(&mmlist_lock);
if (list_empty(&mm->mmlist))
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
mm-userfaultfd-rely-on-vma-vm_page_prot-in-uffd_wp_range.patch
mm-userfaultfd-rely-on-vma-vm_page_prot-in-uffd_wp_range-fix.patch
mm-mprotect-drop-pgprot_t-parameter-from-change_protection.patch
mm-mprotect-drop-pgprot_t-parameter-from-change_protection-fix.patch
selftests-vm-cow-add-cow-tests-for-collapsing-of-pte-mapped-anon-thp.patch
mm-nommu-factor-out-check-for-nommu-shared-mappings-into-is_nommu_shared_mapping.patch
mm-nommu-dont-use-vm_mayshare-for-map_private-mappings.patch
drivers-misc-open-dice-dont-touch-vm_mayshare.patch
selftests-mm-define-madv_pageout-to-fix-compilation-issues.patch
mm-debug_vm_pgtable-more-pte_swp_exclusive-sanity-checks.patch
alpha-mm-support-__have_arch_pte_swp_exclusive.patch
arc-mm-support-__have_arch_pte_swp_exclusive.patch
arm-mm-support-__have_arch_pte_swp_exclusive.patch
csky-mm-support-__have_arch_pte_swp_exclusive.patch
hexagon-mm-support-__have_arch_pte_swp_exclusive.patch
ia64-mm-support-__have_arch_pte_swp_exclusive.patch
loongarch-mm-support-__have_arch_pte_swp_exclusive.patch
m68k-mm-remove-dummy-__swp-definitions-for-nommu.patch
m68k-mm-support-__have_arch_pte_swp_exclusive.patch
microblaze-mm-support-__have_arch_pte_swp_exclusive.patch
mips-mm-support-__have_arch_pte_swp_exclusive.patch
nios2-mm-refactor-swap-pte-layout.patch
nios2-mm-support-__have_arch_pte_swp_exclusive.patch
openrisc-mm-support-__have_arch_pte_swp_exclusive.patch
parisc-mm-support-__have_arch_pte_swp_exclusive.patch
powerpc-mm-support-__have_arch_pte_swp_exclusive-on-32bit-book3s.patch
powerpc-nohash-mm-support-__have_arch_pte_swp_exclusive.patch
riscv-mm-support-__have_arch_pte_swp_exclusive.patch
sh-mm-support-__have_arch_pte_swp_exclusive.patch
sparc-mm-support-__have_arch_pte_swp_exclusive-on-32bit.patch
sparc-mm-support-__have_arch_pte_swp_exclusive-on-64bit.patch
um-mm-support-__have_arch_pte_swp_exclusive.patch
x86-mm-support-__have_arch_pte_swp_exclusive-also-on-32bit.patch
xtensa-mm-support-__have_arch_pte_swp_exclusive.patch
mm-remove-__have_arch_pte_swp_exclusive.patch
