buildroot/package/busybox/busybox-1.8.2-arping.patch

diff -urN busybox-1.8.2/networking/arping.c busybox-1.8.2-arping/networking/arping.c
--- busybox-1.8.2/networking/arping.c	2007-11-10 01:40:47.000000000 +0000
+++ busybox-1.8.2-arping/networking/arping.c	2007-12-18 10:31:55.000000000 +0000
@@ -207,7 +207,8 @@
 		}
 
 		if (last) {
-			printf(" %u.%03ums\n", last / 1000, last % 1000);
+			unsigned diff = MONOTONIC_US() - last;
+			printf(" %u.%03ums\n", diff / 1000, diff % 1000);
 		} else {
 			printf(" UNSOLICITED?\n");
 		}