--- 2.4.14pre6aa1/include/linux/blkdev.h.~1~	Thu Nov  1 05:20:45 2001
+++ 2.4.14pre6aa1/include/linux/blkdev.h	Thu Nov  1 05:28:24 2001
@@ -140,7 +140,8 @@
 extern inline struct buffer_head *blk_queue_bounce(request_queue_t *q, int rw,
 						   struct buffer_head *bh)
 {
-	if (bh->b_page <= q->bounce_pfn + mem_map)
+	struct page * page = bh->b_page;
+	if (page - page->zone->zone_mem_map <= q->bounce_pfn)
 		return bh;
 
 	return create_bounce(rw, bh);
--- linux/include/asm-alpha/io.h.~1~	Sun Sep 23 21:11:40 2001
+++ linux/include/asm-alpha/io.h	Thu Nov  1 07:13:50 2001
@@ -60,6 +60,8 @@
 	return (void *) (address + IDENT_ADDR);
 }
 
+#define page_to_phys(page)	(((page) - (page)->zone->zone_mem_map) << PAGE_SHIFT)
+
 /*
  * Change addresses as seen by the kernel (virtual) to addresses as
  * seen by a device (bus), and vice versa.