fix two compiler warnings in SN2 code

diff -Nru a/arch/ia64/sn/io/sn2/ml_iograph.c b/arch/ia64/sn/io/sn2/ml_iograph.c
@@ -508,13 +508,10 @@
 			ASSERT_ALWAYS(to);
 			rc = hwgraph_edge_add(from, to,
 				EDGE_LBL_INTERCONNECT);
-			if (rc = -EEXIST)
-				goto link_done;
-			if (rc != GRAPH_SUCCESS) {
+			if (rc != -EEXIST && rc != GRAPH_SUCCESS) {
 				printk("%s: Unable to establish link"
 					" for xbmon.", pathname);
 			}
-link_done:
 		}
 
 #ifdef	SN0_USE_BTE

@@ -617,7 +614,6 @@
 	nodepda_t	*npdap;
 	struct semaphore *peer_sema = 0;
 	uint32_t	widget_partnum;
-	cpu_cookie_t	c = 0;
 
 	npdap = NODEPDA(cnodeid);
 

diff -Nru a/arch/ia64/sn/io/sn2/shub.c b/arch/ia64/sn/io/sn2/shub.c
@@ -203,7 +203,7 @@
         uint64_t        longarg;
 	int		nasid;
 
-        cnode = (cnodeid_t)file->f_dentry->d_fsdata;
+        cnode = (cnodeid_t)(long)file->f_dentry->d_fsdata;
 
         switch (cmd) {
 	case SNDRV_SHUB_CONFIGURE: