diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 9ab6de8..c081bf6 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -157,7 +157,7 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
                        &NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
 
                x += zone_page_state(z, NR_FREE_PAGES) +
-                    zone_reclaimable_pages(z) - z->dirty_balance_reserve;
+                    zone_reclaimable_pages(z);
        }
        /*
         * Make sure that the number of highmem pages is never larger
@@ -181,8 +181,7 @@ static unsigned long determine_dirtyable_memory(void)
 {
        unsigned long x;
 
-       x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages() -
-           dirty_balance_reserve;
+       x = global_page_state(NR_FREE_PAGES) + global_reclaimable_pages();
 
        if (!vm_highmem_is_dirtyable)
                x -= highmem_dirtyable_memory(x);