Index: sys/compat/linuxkpi/common/include/linux/math64.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/math64.h
+++ sys/compat/linuxkpi/common/include/linux/math64.h
@@ -69,6 +69,8 @@
 	return (dividend / divisor);
 }
 
+#define	div64_ul(x, y)	div64_u64((x), (y))
+
 static inline int64_t
 div_s64(int64_t dividend, int32_t divisor)
 {