diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 77b04ed..450092c 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -173,6 +173,11 @@
 		(__x < 0) ? -__x : __x;		\
 	})
 
+#define abs64(x) ({				\
+		s64 __x = (x);			\
+		(__x < 0) ? -__x : __x;		\
+	})
+
 #ifdef CONFIG_PROVE_LOCKING
 void might_fault(void);
 #else