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Diffstat (limited to 'mm/rmap.c')
-rw-r--r--mm/rmap.c34
1 files changed, 20 insertions, 14 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index cd918cb9a431..0c0d8857dfce 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -826,7 +826,8 @@ static bool folio_referenced_one(struct folio *folio,
}
if (pvmw.pte) {
- if (lru_gen_enabled() && pte_young(*pvmw.pte)) {
+ if (lru_gen_enabled() &&
+ pte_young(ptep_get(pvmw.pte))) {
lru_gen_look_around(&pvmw);
referenced++;
}
@@ -956,13 +957,13 @@ static int page_vma_mkclean_one(struct page_vma_mapped_walk *pvmw)
address = pvmw->address;
if (pvmw->pte) {
- pte_t entry;
pte_t *pte = pvmw->pte;
+ pte_t entry = ptep_get(pte);
- if (!pte_dirty(*pte) && !pte_write(*pte))
+ if (!pte_dirty(entry) && !pte_write(entry))
continue;
- flush_cache_page(vma, address, pte_pfn(*pte));
+ flush_cache_page(vma, address, pte_pfn(entry));
entry = ptep_clear_flush(vma, address, pte);
entry = pte_wrprotect(entry);
entry = pte_mkclean(entry);
@@ -1137,7 +1138,7 @@ void page_move_anon_rmap(struct page *page, struct vm_area_struct *vma)
* @folio: Folio which contains page.
* @page: Page to add to rmap.
* @vma: VM area to add page to.
- * @address: User virtual address of the mapping
+ * @address: User virtual address of the mapping
* @exclusive: the page is exclusively owned by the current process
*/
static void __page_set_anon_rmap(struct folio *folio, struct page *page,
@@ -1458,6 +1459,7 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
bool anon_exclusive, ret = true;
struct mmu_notifier_range range;
enum ttu_flags flags = (enum ttu_flags)(long)arg;
+ unsigned long pfn;
/*
* When racing against e.g. zap_pte_range() on another cpu,
@@ -1508,8 +1510,8 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
break;
}
- subpage = folio_page(folio,
- pte_pfn(*pvmw.pte) - folio_pfn(folio));
+ pfn = pte_pfn(ptep_get(pvmw.pte));
+ subpage = folio_page(folio, pfn - folio_pfn(folio));
address = pvmw.address;
anon_exclusive = folio_test_anon(folio) &&
PageAnonExclusive(subpage);
@@ -1571,7 +1573,7 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
}
pteval = huge_ptep_clear_flush(vma, address, pvmw.pte);
} else {
- flush_cache_page(vma, address, pte_pfn(*pvmw.pte));
+ flush_cache_page(vma, address, pfn);
/* Nuke the page table entry. */
if (should_defer_flush(mm, flags)) {
/*
@@ -1818,6 +1820,7 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma,
bool anon_exclusive, ret = true;
struct mmu_notifier_range range;
enum ttu_flags flags = (enum ttu_flags)(long)arg;
+ unsigned long pfn;
/*
* When racing against e.g. zap_pte_range() on another cpu,
@@ -1877,6 +1880,8 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma,
/* Unexpected PMD-mapped THP? */
VM_BUG_ON_FOLIO(!pvmw.pte, folio);
+ pfn = pte_pfn(ptep_get(pvmw.pte));
+
if (folio_is_zone_device(folio)) {
/*
* Our PTE is a non-present device exclusive entry and
@@ -1891,8 +1896,7 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma,
VM_BUG_ON_FOLIO(folio_nr_pages(folio) > 1, folio);
subpage = &folio->page;
} else {
- subpage = folio_page(folio,
- pte_pfn(*pvmw.pte) - folio_pfn(folio));
+ subpage = folio_page(folio, pfn - folio_pfn(folio));
}
address = pvmw.address;
anon_exclusive = folio_test_anon(folio) &&
@@ -1952,7 +1956,7 @@ static bool try_to_migrate_one(struct folio *folio, struct vm_area_struct *vma,
/* Nuke the hugetlb page table entry */
pteval = huge_ptep_clear_flush(vma, address, pvmw.pte);
} else {
- flush_cache_page(vma, address, pte_pfn(*pvmw.pte));
+ flush_cache_page(vma, address, pfn);
/* Nuke the page table entry. */
if (should_defer_flush(mm, flags)) {
/*
@@ -2187,6 +2191,7 @@ static bool page_make_device_exclusive_one(struct folio *folio,
struct mmu_notifier_range range;
swp_entry_t entry;
pte_t swp_pte;
+ pte_t ptent;
mmu_notifier_range_init_owner(&range, MMU_NOTIFY_EXCLUSIVE, 0,
vma->vm_mm, address, min(vma->vm_end,
@@ -2198,18 +2203,19 @@ static bool page_make_device_exclusive_one(struct folio *folio,
/* Unexpected PMD-mapped THP? */
VM_BUG_ON_FOLIO(!pvmw.pte, folio);
- if (!pte_present(*pvmw.pte)) {
+ ptent = ptep_get(pvmw.pte);
+ if (!pte_present(ptent)) {
ret = false;
page_vma_mapped_walk_done(&pvmw);
break;
}
subpage = folio_page(folio,
- pte_pfn(*pvmw.pte) - folio_pfn(folio));
+ pte_pfn(ptent) - folio_pfn(folio));
address = pvmw.address;
/* Nuke the page table entry. */
- flush_cache_page(vma, address, pte_pfn(*pvmw.pte));
+ flush_cache_page(vma, address, pte_pfn(ptent));
pteval = ptep_clear_flush(vma, address, pvmw.pte);
/* Set the dirty flag on the folio now the pte is gone. */