mm/migrate.c: add missing flush_dcache_page for non-mapped page migrate

[uclinux-h8/linux.git] / mm / migrate.c

diff --git a/mm/migrate.c b/mm/migrate.c
index ac6f493..663a544 100644 (file)
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -248,10 +248,8 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
                                pte = swp_entry_to_pte(entry);
                        } else if (is_device_public_page(new)) {
                                pte = pte_mkdevmap(pte);
-                               flush_dcache_page(new);
                        }
-               } else
-                       flush_dcache_page(new);
+               }
 
 #ifdef CONFIG_HUGETLB_PAGE
                if (PageHuge(new)) {
@@ -995,6 +993,13 @@ static int move_to_new_page(struct page *newpage, struct page *page,
                 */
                if (!PageMappingFlags(page))
                        page->mapping = NULL;
+
+               if (unlikely(is_zone_device_page(newpage))) {
+                       if (is_device_public_page(newpage))
+                               flush_dcache_page(newpage);
+               } else
+                       flush_dcache_page(newpage);
+
        }
 out:
        return rc;