diff -urN 2.4.6ac1/fs/buffer.c 2.4.6ac2/fs/buffer.c
--- 2.4.6ac1/fs/buffer.c	Wed Jul  4 16:07:49 2001
+++ 2.4.6ac2/fs/buffer.c	Sat Jul  7 18:04:32 2001
@@ -1536,8 +1536,9 @@
 	SetPageUptodate(page);
 	/* Stage 3: submit the IO */
 	do {
+		struct buffer_head *next = bh->b_this_page;
 		submit_bh(WRITE, bh);
-		bh = bh->b_this_page;		
+		bh = next;
 	} while (bh != head);
 
 	/* Done - end_buffer_io_async will unlock */
@@ -2214,8 +2215,9 @@
 
 	/* Stage 2: start the IO */
 	do {
+		struct buffer_head *next = bh->b_this_page;
 		submit_bh(rw, bh);
-		bh = bh->b_this_page;
+		bh = next;
 	} while (bh != head);
 	return 0;
 }