diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 9 | ||||
| -rw-r--r-- | mm/pagewalk.c | 2 |
2 files changed, 5 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 93c0c25433d0..9a540e231625 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -672,11 +672,10 @@ struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr, { unsigned long pfn = pmd_pfn(pmd); - /* - * There is no pmd_special() but there may be special pmds, e.g. - * in a direct-access (dax) mapping, so let's just replicate the - * !CONFIG_ARCH_HAS_PTE_SPECIAL case from vm_normal_page() here. - */ + /* Currently it's only used for huge pfnmaps */ + if (unlikely(pmd_special(pmd))) + return NULL; + if (unlikely(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP))) { if (vma->vm_flags & VM_MIXEDMAP) { if (!pfn_valid(pfn)) diff --git a/mm/pagewalk.c b/mm/pagewalk.c index cd79fb3b89e5..461ea3bbd8d9 100644 --- a/mm/pagewalk.c +++ b/mm/pagewalk.c @@ -753,7 +753,7 @@ struct folio *folio_walk_start(struct folio_walk *fw, fw->pudp = pudp; fw->pud = pud; - if (!pud_present(pud) || pud_devmap(pud)) { + if (!pud_present(pud) || pud_devmap(pud) || pud_special(pud)) { spin_unlock(ptl); goto not_found; } else if (!pud_leaf(pud)) { |