--- libddr_hash.c.orig	2017-08-25 09:51:38.170686244 +0200
+++ libddr_hash.c	2017-08-25 17:14:33.308431613 +0200
@@ -398,7 +398,7 @@
 #error __WORDSIZE unknown
 #endif
 
-inline int round_down(int val, const int gran)
+static inline int round_down(int val, const int gran)
 {
 	return val-val%gran;
 }