diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 46f159f9d947b7eb87dd730391029059b461c8e0..5b9c6246de6d95c5a7d9e74b274000e59351e5ec 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -168,6 +168,12 @@ static inline u64 cl_address(u64 address)
 	return (address & ~(cacheline_size - 1));
 }
 
+static inline u64 cl_offset(u64 address)
+{
+	/* return the cacheline of the address */
+	return (address & (cacheline_size - 1));
+}
+
 enum sort_mode {
 	SORT_MODE__NORMAL,
 	SORT_MODE__BRANCH,