diff -urN 2.4.13pre1/arch/i386/mm/init.c ordered/arch/i386/mm/init.c
--- 2.4.13pre1/arch/i386/mm/init.c	Sun Sep 23 21:11:28 2001
+++ ordered/arch/i386/mm/init.c	Fri Oct 12 19:04:54 2001
@@ -469,7 +469,7 @@
 		if (page_is_ram(tmp) && PageReserved(mem_map+tmp))
 			reservedpages++;
 #ifdef CONFIG_HIGHMEM
-	for (tmp = highstart_pfn; tmp < highend_pfn; tmp++) {
+	for (tmp = highend_pfn-1; tmp >= highstart_pfn; tmp--) {
 		struct page *page = mem_map + tmp;
 
 		if (!page_is_ram(tmp)) {
diff -urN 2.4.13pre1/mm/bootmem.c ordered/mm/bootmem.c
--- 2.4.13pre1/mm/bootmem.c	Sun Sep 23 21:11:43 2001
+++ ordered/mm/bootmem.c	Fri Oct 12 19:04:56 2001
@@ -237,14 +237,15 @@
 {
 	struct page *page = pgdat->node_mem_map;
 	bootmem_data_t *bdata = pgdat->bdata;
-	unsigned long i, count, total = 0;
-	unsigned long idx;
+	unsigned long count, total = 0;
+	long idx, i;
 
 	if (!bdata->node_bootmem_map) BUG();
 
 	count = 0;
 	idx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
-	for (i = 0; i < idx; i++, page++) {
+	page += --idx;
+	for (i = idx; i >= 0; i--, page--) {
 		if (!test_bit(i, bdata->node_bootmem_map)) {
 			count++;
 			ClearPageReserved(page);
@@ -260,7 +261,9 @@
 	 */
 	page = virt_to_page(bdata->node_bootmem_map);
 	count = 0;
-	for (i = 0; i < ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE; i++,page++) {
+	idx = ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE;
+	page += --idx;
+	for (i = idx; i >= 0; i--, page--) {
 		count++;
 		ClearPageReserved(page);
 		set_page_count(page, 1);