mm: convert generic code to 5-level paging

[mirror_ubuntu-bionic-kernel.git] / mm / page_vma_mapped.c

diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c
index a23001a22c151886919d3c24508d64ed1a7c8c16..c4c9def8ffea47b4838fc3095221ee90e0c0fae3 100644 (file)
--- a/mm/page_vma_mapped.c
+++ b/mm/page_vma_mapped.c
@@ -104,6 +104,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk *pvmw)
        struct mm_struct *mm = pvmw->vma->vm_mm;
        struct page *page = pvmw->page;
        pgd_t *pgd;
+       p4d_t *p4d;
        pud_t *pud;
 
        /* The only possible pmd mapping has been handled on last iteration */
@@ -133,7 +134,10 @@ restart:
        pgd = pgd_offset(mm, pvmw->address);
        if (!pgd_present(*pgd))
                return false;
-       pud = pud_offset(pgd, pvmw->address);
+       p4d = p4d_offset(pgd, pvmw->address);
+       if (!p4d_present(*p4d))
+               return false;
+       pud = pud_offset(p4d, pvmw->address);
        if (!pud_present(*pud))
                return false;
        pvmw->pmd = pmd_offset(pud, pvmw->address);