pktgen: minor cleanup

A couple of minor functions can be written more compactly.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 19b8c20..bb46313 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -509,7 +509,7 @@
 
 static int pktgen_if_show(struct seq_file *seq, void *v)
 {
-	struct pktgen_dev *pkt_dev = seq->private;
+	const struct pktgen_dev *pkt_dev = seq->private;
 	__u64 sa;
 	__u64 stopped;
 	__u64 now = getCurUs();
@@ -1670,7 +1670,7 @@
 static int pktgen_thread_show(struct seq_file *seq, void *v)
 {
 	struct pktgen_thread *t = seq->private;
-	struct pktgen_dev *pkt_dev;
+	const struct pktgen_dev *pkt_dev;
 
 	BUG_ON(!t);
 
@@ -2120,13 +2120,9 @@
 	pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
 }
 
-static inline int f_seen(struct pktgen_dev *pkt_dev, int flow)
+static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
 {
-
-	if (pkt_dev->flows[flow].flags & F_INIT)
-		return 1;
-	else
-		return 0;
+	return !!(pkt_dev->flows[flow].flags & F_INIT);
 }
 
 static inline int f_pick(struct pktgen_dev *pkt_dev)
@@ -3101,17 +3097,14 @@
 	mutex_unlock(&pktgen_thread_lock);
 }
 
-static int thread_is_running(struct pktgen_thread *t)
+static int thread_is_running(const struct pktgen_thread *t)
 {
-	struct pktgen_dev *pkt_dev;
-	int res = 0;
+	const struct pktgen_dev *pkt_dev;
 
 	list_for_each_entry(pkt_dev, &t->if_list, list)
-		if (pkt_dev->running) {
-			res = 1;
-			break;
-		}
-	return res;
+		if (pkt_dev->running)
+			return 1;
+	return 0;
 }
 
 static int pktgen_wait_thread_run(struct pktgen_thread *t)