Don't get stuck in an infinite loop on negative integers!

[people/sha0/gpxe.git] / src / core / bitops.c

diff --git a/src/core/bitops.c b/src/core/bitops.c
index 75d57bf..53abaae 100644 (file)
--- a/src/core/bitops.c
+++ b/src/core/bitops.c
@@ -1,10 +1,11 @@
 #include <strings.h>
 
 int __flsl ( long x ) {
-       int r = 0;
+       unsigned long value = x;
+       int ls = 0;
 
-       for ( r = 0 ; x ; r++ ) {
-               x >>= 1;
+       for ( ls = 0 ; value ; ls++ ) {
+               value >>= 1;
        }
-       return r;
+       return ls;
 }