--- zzzz-none-000/linux-3.10.107/net/decnet/dn_timer.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/net/decnet/dn_timer.c	2021-02-04 17:41:59.000000000 +0000
@@ -23,6 +23,7 @@
 #include <linux/spinlock.h>
 #include <net/sock.h>
 #include <linux/atomic.h>
+#include <linux/jiffies.h>
 #include <net/flow.h>
 #include <net/dn.h>
 
@@ -91,7 +92,7 @@
 	 * since the last successful transmission.
 	 */
 	if (scp->keepalive && scp->keepalive_fxn && (scp->state == DN_RUN)) {
-		if ((jiffies - scp->stamp) >= scp->keepalive)
+		if (time_after_eq(jiffies, scp->stamp + scp->keepalive))
 			scp->keepalive_fxn(sk);
 	}