mm: Dirty accountable change only apply to non prot numa case

[firefly-linux-kernel-4.4.55.git] / mm / mprotect.c

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 7332c1785744fa0517a213b489e9c5b6bf350937..33eab902f10e8efb255f1b3981e67d709cafb6b2 100644 (file)
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -58,6 +58,13 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
                                if (pte_numa(ptent))
                                        ptent = pte_mknonnuma(ptent);
                                ptent = pte_modify(ptent, newprot);
+                               /*
+                                * Avoid taking write faults for pages we
+                                * know to be dirty.
+                                */
+                               if (dirty_accountable && pte_dirty(ptent))
+                                       ptent = pte_mkwrite(ptent);
+                               ptep_modify_prot_commit(mm, addr, pte, ptent);
                                updated = true;
                        } else {
                                struct page *page;
@@ -72,22 +79,8 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
                                        }
                                }
                        }
-
-                       /*
-                        * Avoid taking write faults for pages we know to be
-                        * dirty.
-                        */
-                       if (dirty_accountable && pte_dirty(ptent)) {
-                               ptent = pte_mkwrite(ptent);
-                               updated = true;
-                       }
-
                        if (updated)
                                pages++;
-
-                       /* Only !prot_numa always clears the pte */
-                       if (!prot_numa)
-                               ptep_modify_prot_commit(mm, addr, pte, ptent);
                } else if (IS_ENABLED(CONFIG_MIGRATION) && !pte_file(oldpte)) {
                        swp_entry_t entry = pte_to_swp_entry(oldpte);