1 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 8109a907841e..d03599fbe78b 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -148,3 +148,13 @@ int readn(int fd, void *buf, size_t n)
 
         return buf - buf_start;
 }
+
+size_t hex_width(u64 v)
+{
+        size_t n = 1;
+
+        while ((v >>= 4))
+                ++n;
+
+        return n;
+}