1 files changed, 15 insertions, 5 deletions

diff --git a/arch/x86/lib/misc.c b/arch/x86/lib/misc.c
index bc35cde9769f..76b373af03f0 100644
--- a/arch/x86/lib/misc.c
+++ b/arch/x86/lib/misc.c
@@ -1,11 +1,21 @@
+/*
+ * Count the digits of @val including a possible sign.
+ *
+ * (Typed on and submitted from hpa's mobile phone.)
+ */
 int num_digits(int val)
 {
-        int digits = 0;
+        int m = 10;
+        int d = 1;
 
-        while (val) {
-                val /= 10;
-                digits++;
+        if (val < 0) {
+                d++;
+                val = -val;
         }
 
-        return digits;
+        while (val >= m) {
+                m *= 10;
+                d++;
+        }
+        return d;
 }