diff -urN RC13-git3-mxser/drivers/net/s2io.c RC13-git3-s2io-u64/drivers/net/s2io.c
--- RC13-git3-mxser/drivers/net/s2io.c	2005-09-02 14:09:46.000000000 -0400
+++ RC13-git3-s2io-u64/drivers/net/s2io.c	2005-09-04 08:52:43.000000000 -0400
@@ -354,7 +354,7 @@
 	int lst_size, lst_per_page;
 	struct net_device *dev = nic->dev;
 #ifdef CONFIG_2BUFF_MODE
-	u64 tmp;
+	unsigned long tmp;
 	buffAdd_t *ba;
 #endif
 
@@ -542,18 +542,18 @@
 				    (BUF0_LEN + ALIGN_SIZE, GFP_KERNEL);
 				if (!ba->ba_0_org)
 					return -ENOMEM;
-				tmp = (u64) ba->ba_0_org;
+				tmp = (unsigned long) ba->ba_0_org;
 				tmp += ALIGN_SIZE;
-				tmp &= ~((u64) ALIGN_SIZE);
+				tmp &= ~((unsigned long) ALIGN_SIZE);
 				ba->ba_0 = (void *) tmp;
 
 				ba->ba_1_org = (void *) kmalloc
 				    (BUF1_LEN + ALIGN_SIZE, GFP_KERNEL);
 				if (!ba->ba_1_org)
 					return -ENOMEM;
-				tmp = (u64) ba->ba_1_org;
+				tmp = (unsigned long) ba->ba_1_org;
 				tmp += ALIGN_SIZE;
-				tmp &= ~((u64) ALIGN_SIZE);
+				tmp &= ~((unsigned long) ALIGN_SIZE);
 				ba->ba_1 = (void *) tmp;
 				k++;
 			}