1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index 865777dec161..3adb79257f43 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -53,6 +53,10 @@ static void v6_copy_user_page_aliasing(void *kto, const void *kfrom, unsigned lo
 {
         unsigned int offset = CACHE_COLOUR(vaddr);
         unsigned long from, to;
+        struct page *page = virt_to_page(kfrom);
+
+        if (test_and_clear_bit(PG_dcache_dirty, &page->flags))
+                __flush_dcache_page(page_mapping(page), page);
 
         /*
          * Discard data in the kernel mapping for the new page.