build: fix kernel version info

diff --git a/configure.ac b/configure.ac
index 5e2e39432eafe986515e0e8963b097b7892a7290..68abfbbe10fb9538a14ba6b038ad52f65ee9ee8f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -79,10 +79,14 @@ krel="${krel#*.}";
 kminor="${krel%%.*}";
 krel="${krel#*.}";
 kmicro="${krel%%.*}";
-krel="${krel#*.}";
-kstable="${krel%%.*}";
-if test -z "$kstable"; then
+krel2="${krel#*.}";
+if test "$krel" = "$krel2"; then
        kstable=0;
+else
+       kstable="${krel%%.*}";
+       if test -z "$kstable"; then
+               kstable=0;
+       fi;
 fi;
 echo "Found kernel version $kmajor.$kminor.$kmicro.$kstable in $kbuilddir";
 if test "$kmajor" -gt 2 -o "$kminor" -gt 6 -o "$kmicro" -gt 30; then